イオン化エネルギー

固体物性研究の観点から関心がもたれると思われる有機化合物を中心として、実験によって決められた孤立分子とその固体のイオン化エネルギーの値を集めた。
データの収集にあたっては、最近までの報告値をなるべく多く検討し、その結果として分子と固体についてそれぞれ次のような値の収録を行った。ただし、既に以前に報告値が収束しているような化合物も少なくなく、そのような場合には古い値をそのまま掲載したものもある。なお、たとえば次の文献を参照されたい。
K. Seki, ﾒIonization energies of free molecules and molecular solids,ﾓ Mol. Cryst. Liq. Cryst. 171 (1989) 255.

(1) 孤立分子については、典型的な電子供与体と電子受容体を含む多くの芳香族化合物を対象として、気相の第一イオン化エネルギー（Ig）を集めた。同一化合物に対し複数の値が報告されている場合には、紫外光電子分光法（UPS）により決定された最も信頼性が高いと思われる値を一つだけ示すことを原則とした。
分子とその正イオンとの間に起こる電子の脱離／付加過程を考えると、分子のイオン化エネルギーの値には断熱値（adiabatic ionization energy, Ia）、垂直脱離値（vertical detachment ionization energy, Idv）、垂直付加値（vertical attachment ionization energy, Iav）の三種類がある。そして、しばしばこれらの間には Idv > Ia > Iav の関係が認められる。今回収集したデータは UPS による決定値であり、この方法では多くの場合スペクトルの第一ピークの値から Idv が求まる。しかし、そのピーク形状から Ia が見積れる場合もあるため、原報に測定スペクトルが示されている場合にはそれも検討した。このようにして Ia が求められた化合物もあり、そのような値についてはそれと分かるようにした。

(2) 固体のイオン化エネルギー（Is）としては、高分子のデータを別にしてイオン化閾値が報告されている物質のほぼ総てについて、その値を集めた。なお、それらの値には、UPS で決められたものと、光電子放出の量子収量の励起光エネルギー依存性（PQY）やその他の方法で決められたものとがある。

孤立分子と固体のイオン化エネルギーの双方が報告されている物質については、分子の気相から固相への凝集に基づく緩和エネルギーも示した。この緩和エネルギーは、両相のイオン化エネルギーの差  D = Ig ﾐ Is  として定義される量である。この量がもつ意味などについては、たとえば次の文献を参照されたい。
N. Sato, ﾒMolecular electronic relaxation in organic solids,ﾓ Electrical and related properties of organic solids, R. W. Munn, A. Miniewicz and B Kuchta (eds.), (Kluwer Academic Publishers, Dordrecht, 1997), pp. 157 - 166.
【化合物別の収録順序（イオン化エネルギー）】


	RARE GASES AND SIMPLE INORGANIC COMPOUNDS
	SIMPLE ORGANIC COMPOUNDS
	POLYCYCLIC AROMATIC HYDROCARBONS
	METHYL- AND PHENYL-SUBSTITUTED AROMATIC HYDROCARBONS
	OTHER SUBSTITUTED HYDROCARBONS
	HETEROCYCLES
	AMINES
	QUINONES
	ELECTRON ACCEPTORS
	PHTHALOCYANINES AND PORPHYRINS
	METALLOCENES
	LONG ALKYL COMPOUNDS
	DIACETYLENE COMPOUNDS
	DYES AND PIGMENTS
		Alizaline Dyes
		Azine Dyes
		Azo Dyes
		Carotenoids
		Cyanines
		Furanquinone Pigments
		Indene Derivatives
		Merocyanines
		Oxazine Dyes
		Thiazine Dyes
		Triphenylmethane Dyes
		Viologen Dyes
		Xanthene Dyes
		Others
	MOLECULAR COMPLEXES
		Organic-Organic Complexes
		Inorganic-Organic Complexes

	NOTE

	REFERENCES
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


RARE GASES AND SIMPLE INORGANIC COMPOUNDS

Neon 	21.56	SKJ85	20.3		SKJ85	1.3
Argon	15.76	SKJ85	13.9		SKJ85	1.9
Krypton	14.00	SKJ85	11.9		SKJ85	2.1
Xenon	12.13	SKJ85	9.7		SKJ85	2.4
Nitrogen	15.57	TBBB70	14.0		HSK75	1.5
			14.2		LFK82
Oxygen 	12.07	TBBB70	10.5		HSK75	1.6
Iodine	9.26*	KKAYI81	6.34		YSI87	2.92
H2O	12.61	TBBB70	9.9		YMS75	2.7
			9.85		Su
CO2	13.78	TBBB70	12.3		HSK75	1.5
			11.9		FLK84
NH3	10.16	TBBB70	8.3�		YMS75	1.9?
SF6	15.5	KMJBS76	14.3		FK85	1.2



SIMPLE ORGANIC COMPOUNDS

Methane	12.70	TBBB70	11.2		HSK75	1.2
Neopentane	10.2*	JSGC72/3	8.7		SI83	1.5
Hexane	10.25*	Hp	8.55		SI83	1.7
3-Methylpentane	10.2*	Hp	8.85		SI83	1.4
2,2-Dimethylbutane	10.2*	Hp	8.8		SI83	1.4
Cyclohexane	9.88	BHHM77	8.2		SI83	1.7
Methylcyclohexane	9.5	BHHM77	8.3		SI83	1.2
Ethylene	10.51	B79a 	9.1		?	1.4
1-Hexene	9.37	AB78	7.6		SI78	1.8
Acetylene	11.40	TBBB70	9.7		FK84	1.7
Methanol	10.8*	KKKAYI81	8.7		YMS75	2.1
Ethanol	10.3*	KKKAYI81	8.3		YMS75	2.0
Formaldehyde	10.9*	TBBB70	8.4		YMS75	2.5
CH2Cl2	11.2*	KKAIY81	9.4		YSIu	1.8
CHCl3	11.3*	KKAIY81	9.3		YSIu	2.0
CCl4	11.4*	KKAIY81	9.4		YSIu	2.0
			9.4		FK85
CBr4	10.2	GGJOT70	7.3		SI87	2.9
CI4	9.00	JDS82	5.50		SI87	3.50
C2Br4	9.105	PNL83	6.17		SI87	2.9
C2I4	8.57	JVMDS82	5.04		SI87	3.5
Tetramethylsilane	9.79	JSGS72/3	8.2		SI83	1.6Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________

POLYCYCLIC AROMATIC HYDROCARBONS

Benzene	9.17	CBH72	7.3		YMS75	2.1
			7.1		Su
				7.58	AS75
Naphthalene	8.12*	CBH72	6.4		SSI81	1.7
	8.15	BMS72		6.84	LM62
				6.76ﾄ	LM60
Anthracene	7.36*	CBH72	5.67ﾄ		SSI83a	1.7
	7.47	BCS74	5.75		KSSI82
			5.70		SSI81
			5.88		NES74
			5.7	5.75	HHI77
				5.65	VS72
				5.65ﾄ	LM60
				5.85	HVK68
			5.65	5.68	KHHI70
				5.5	V13
				5.6-6.2	H12
				(4.9-5.6)	VZG63
				5.85	MK70
				5.95ﾄ	MK70
				5.75	FHI72
Naphthacene	6.89*	CBH72	5.10		SSI81	1.8
	7.04	BCS74	5.25		VZG63
			5.40	5.43	KHHI70
				5.26ﾄ	LM60
				5.38�	KC61
				5.3	HVK68
				5.24	HI66
				5.31	BL68
				5.2	ZV71
				5.3	SHKI76
				5.4ｨ	APH79
Pentacene	6.58*	CBH72	4.85		Ht	1.7
	6.74	BMS72	5.1		VZG63
			5.06	5.04	KHHI70
				5.08�	KC61
				4.95	SHKI76
				5.07	HI66
Hexacene	6.43	BCS74
Phenanthrene	7.86	BMS72	6.08ﾄ		SISK85	1.8
			6.13		SISK85
				6.45ﾄ	LM60
Chrysene	7.51	BMS72	5.8		SSI81	1.7
				5.73ﾄ	LM60
Benz[a]anthracene	7.38	BMS72	5.64		Ht	1.7
	7.41	BCS74		5.68ﾄ	LM60
			5.76		ZV71
Benzo[c]phenanthrene	7.6	BH72	6.2		SSI81	1.4
	7.60	S77
Triphenylene	7.81	BS72	6.2		H2t	1.6
	7.89	BCS74
Napth[2,1-a]anthracene	7.2	SSI81	5.45		H2t	1.8
	7.14	BCS74
Dibenz[a,h]anthracene	7.35	SSI81	5.55		H2t	1.8
	7.38	BCS74		5.69ﾄ	LM60
Picene	7.5	BMS72	5.7		H2t	1.8
	7.54	BCS74
Dibenzo[g,p]chrysene	6.97*	BCS74	5.8		SSI81	1.2
Pyrene	7.37	BS72	5.58ﾄ		SISK85	1.7
	7.41	BCS74	5.83		SISK85
			5.8		Ht
			5.84	5.85	HHI74
				5.81ﾄ	LM60
				5.78ｨ	GR69
Benzo[a]pyrene	7.12	BMS72		5.4	BL68	1.7
						
Dibenzo[fg,op]naphthacene	7.26*	SSI81	5.7		SSI81	1.6
	7.40	BCS74
Perylene	6.90*	SSI81	5.12ﾄ		SSI83	1.8
	7.00	BCS74	5.2		SHKI76
			5.40	5.33	KHHI70
				5.40	BL68
				5.39�	KC61
				5.40	KHI67
				5.2	SHKI76
				5.26ｨ	GR69
				5.65	ABM76
Benzo[ghi]perylene	7.12*	BMS72	5.26ﾄ		SISK85	1.9
	7.19	BCS74	5.44		SISK85
			5.4		SSI81
Coronene	7.25*	BS72	5.52		Ht	1.7
	7.36	BCS74	5.59	5.58	HKAIH69
			5.3		SHKI76
				5.15	BL68
Pyranthrene			5.05	5.04	HKAIH69
Violanthrene A	6.42	SSI81	4.86		SSI81	1.6
			5.20	5.06	HKAIH69
				4.96	HI66
				5.20�	KC61
				5.0	ABS74
Isoviolanthrene A	6.36	SISAI82	4.92		SISAI82	1.4
				?5.20�	HKAIH69
				5.0	ABS74
Violanthrene B	6.36	SISAI82	4.82		SISAI82	1.5
			5.13		HKAIH69
Isoviolanthrene B	6.54	SISAI82	4.96		SISAI82	1.6
Tetrabenzo[a,cd,j,lm]perylene	6.58	SISAI82	5.34		SISAI82	1.2
Tetrabenzo[de,hi,op,st]pentacene	6.13	SISAI82	4.98		SISAI82	1.2
Quaterrylene	6.11	CS78		4.76	HI66	1.4
Ovalene	6.86	BMS72
Hexabenzo[a,d,g,j,m,p]coronene	6.87	SC78
Graphite				4.7	WFF71
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


Biphenyl	8.2	E72
p-Terphenyl	7.9	HSI75	6.1�	5.8	HSI75	1.8
	7.8	SKEKS84	6.2		SHKI76
Sexiphenyl	7.2	SKEKS84	5.9		SKEKS84	1.3
Bibenzyl	8.75*	PMRL71	7.2		Su	1.6
Acenaphthene	7.82	BCS74
Acenaphtylene	8.22	BCS74
Biphenylene	7.53	E72
Fluoranthene	7.95	BCS74
Decacyclene				5.40�	KC61
				4.74	IKH67
Azulene	7.43	BCS74
Benz[a]indeno[1,2,3-cd]azulene	6.84	SSI81	5.0		SSI81	1.9


________________________________________________________________________________

Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


METHYL- AND PHENYL-SUBSTITUTED AROMATIC HYDROCARBONS

Toluene	8.67	DR72/3	7.28		AS75	1.4
o-Xylene	8.4*	K72
m-Xylene	8.5*	K72
p-Xylene	8.3*	K72
Hexamethylbenzene	7.85^	VT57
1-Methylnaphthalene	7.95v	HHPT72
2-Methylnaphthalene	7.93v	HHPT72
9-Methylanthracene	7.23	HI74	5.75	5.68	HHI77	1.5
				5.56	VS72
2,3-Dimethylanthracene			5.41ﾄ		SISK85
9,10-Dimethylanthracene				5.43	VS72
9-Phenylanthracene	9.0*	SSBV72		6.10	MK70	2.9?
9,10-Diphenylanthracene	7.05	BCS74	5.85		SSI81	1.2
				6.25ﾄ	MK70
				6.05	MK70
				5.85	FHI73
9,9'-Bianthryl	7.2	HHI77	5.9	5.96	HHI77	1.3
Rubrene	6.41	THSSIF79	5.3		THSSIF79	1.1
				5.10	BL68
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


OTHER SUBSTITUTED AROMATIC HYDROCARBONS

Phenol	8.48	E69
Fluorobenzene	8.9*	BMT68
Chlorobenzene	8.9*	BMT68
Bromobenzene	9.0*	BMT68
Iodobenzene	8.4*	BMT68
Methoxybenzene	8.0*	BMT68
Benzonitrile	9.2*	BMT68
Nitrobenzene	9.6*	BMT68
p-Dinitrobenzene	10.3	EGR75
Hexachlorobenzene	8.98	SSI81a	7.3		SSI81a	1.7
Hexabromobenzene	8.80	SSSI81a	7.1		SSSI81a	1.7
Hexaiodobenzene	7.90	SSSI81a	5.9		SSSI81a	2.0

9-Bromoanthracene				6.10	MK70
9,10-Dichloroanthracene	7.5*	SW74	5.8	5.75	HHI77	1.7
				6.10	MK70
9,10-Dibromoanthracene	7.5*	SW74		6.08	MK70	1.4
1,6-Dicyanopyrene			6.33	6.23	HHI74
1,3,6,8-Tetrachloropyrene			(6.26)		HHI74
1,3,6,8-Tetrabromopyrene			5.97		HHI74
1,3,6,8-Tetracyanopyrene			6.21	6.35	HHI74
1,3,6,8-Tetranitropyrene			6.56	6.52	HHI74



HETEROCYCLICS

Thiophene	8.87	E69
Pyrrole	8.209	DAEL71
Pyridine	9.26	TBBB70	7.3�		YMS75	2.0
			(8.0)		FSK84	1.3
Pyrazine	9.28	E69
Indole	7.75*	E69
Quinoline	8.5*	VV72
Isoquinoline	8.4*	VV72
Carbazole	7.53	HCH75	5.87		KSSI82	1.5
	7.60	RKKG78	6.66		NES74
Acridine	7.88	HCH75		ca.6.2	MK70	1.7?
	8.13	MMKY75
Phenazine	8.4	MMKY75		ca.7.1	MK70	1.3?
Phenothiazine	6.82	HH75	5.15ﾄ		SISK85	1.5
	6.72	DMH77	5.18		SISK58
			5.18		KSSI82
				4.99	KC61�
				ca.4.8	Mt
Dibenzophenothiazine			5.21	5.36	HKAIH69?
Benzo[b]naphtho[2,3-d]furan (Brazan)			5.77ﾄ		SISK85
			5.81
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


Promazine				ca.5.1	Mt
Promazine hydrochloride				ca.5.4	Mt
Chloropromazine				ca.4.7	Mt
Chloropromazine hydrochloride				ca.5.2	Mt

Adenine	8.0*	PPL76	7.0		PI76	1.0
				6.4	SBRPS73
Guanine	7.85	DYVAM78
Cytosine	8.45	DYVAM78	7.5		PI76	1.0
Tymine	8.95	DWMM76	7.7		PI76	1.3
Uracil	9.34	DWMM76	7.8		PI76	1.5
Tryptophan	7.3	SI79	6.1		Su	1.2
Reserpine				5.2	Mt

Tetraphenyl[3,4-c]thienothiophene	6.1	MSCL76
6a-Thiathiophthene	8.11	GHLHL71	5.88		SKu	2.1
2,5-Dimethyl-6a-thiathiophthene	7.59	GHLHL71?	5.73		SKu	1.9
2,5-Dimethyl-6a-thia-1-azapentalene	7.00	GHLHL71?	5.61		SKu	1.4
NMe,NMe,H,H?			(5.25)		SKu
1,2,5,6-Tetramethyl-6a-thia-1,6-	6.3*	GGR75	4.93		SKu	1.4
diazapentalene
1,8-Dithianaphthalene	7.0*	SCNEH78	5.75		SCNEH78	1.3

Tetrathianaphthacene (TTN)	6.07	SIS81	4.4		SIS81	1.7
			4.55	4.42	KHHI70
				4.56	HI66
				4.53	KHI67
				4.56	IKH67
			4.75	4.75	BA71
Tetraselenanaphthacene			4.45		SKIH76

Tetrathiafulvalene (TTF)	6.4	GSCF73	5.0		NES74	1.4
	6.4	BCW74
DimethylTTF (DMTTF)	6.00	SIS81	5.1		SIS81	0.9
TetramethylTTF (TMTTF)	6.03	SIS81	4.9		SIS81	1.1
HexamethyleneTTF (HMTTF)	6.06	SSI83	4.63		SSI83	1.4
TetrathiomethoxyTTF (TTMTTF)	6.29	SSI83	5.00		SSI83	1.3
Bis(ethylenedithiolo)TTF	6.21	SSI83	4.78		SSI83	1.4
(BEDT-TTF)
DibenzoTTF (DBTTF)	6.68	SIS81	4.4		SIS81	2.3
Tetraselenafulvalene (TSF)	6.68	STE77	4.99		SSI83	1.7
TetramethylTSF (TMTSF)	6.27	GKSFBBC79	4.84		SSI83	1.4
HexamethyleneTSF (HMTSF)	6.12	SSI83	4.75		SSI83	1.4
Hexamethylnenetetratellurafulvalene	6.81	SSIp	4.87		SSIp	2.9
(HMTTeF)
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


AMINES

Methylamine	8.95	TWI85
Ethylamine	8.78	TWI85
n-Butylamine	8.59	TWI85
Dimethylamine	8.18	TWI85
Diethylamine	7.99	TWI85
Trimethylamine	7.79	TWI85
Triethylamine	7.37	TWI85
Tri(n-propyl)amine	7.18	TWI85
Tetrakis(dimethylamino)ethylene	5.36	CKKLP71
(TDAE)

Aniline	7.71	E69
N-Methylaniline	7.4*	TBBB70	5.9		Su	1.5
N,N'-Dimethylaniline	7.1	EGR75
o-Phenylenediamine	7.2	TST73
m-Phenylenediamine	7.44	TST73
p-Phenylenediamine (PD)	6.84	TST73		5.2	HVK68	1.7
N,N,N',N'-Tetramethyl-p-	6.2	EGR75	5.0		Su	1.2
phenylenediamine (TMPD)				4.63	BL68
				4.7	HVK68

1-Naphthylamine	7.1*	M74
2-Naphthylamine	7.5*	M74
1,5-Naphthalenediamine	6.74	M74
1,8-Naphthalenediamine	6.65	M74
1,6-Pyrenediamine				4.71	BL68

Diphenylamine	7.18	DR74
Triphenylamine	6.82	SY92	5.42		SY92	1.4
	6.75	DR74
Diphenyl-p-tolylamine	6.78	SY92	5.59		SY92	1.2
Phenyldi(p-tolyl)amine	6.52	SY92	5.52		SY92	1.0
Tri(p-tolyl)amine	6.48	SY92	5.42		SY92	1.1


Benzidine (BD)				5.10	BL68
N,N,N',N'-TetramethylBD				5.26	BL68
N,N-Diethyl-N'-(2,4-dinitrobenzo)-			5.5		ZV71
p-phenylenediamine (AK-4)			5.55	5.55	ABB70
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


QUINONES

p-Benzoquinone	9.95	DW69
p-Chloranil (CA)	9.74	SSI81a	8.1		SSI81a	1.6
				5.0?	HVK68
p-Bromanil (BA)	9.59	SSI81a	7.4		SSI81a	2.2
				5.0?	HVK81a
p-Iodanil (IA)	8.58	SSI81a	5.6		SSI81a	3.0
Dichlorodicyano-p-benzoquinone			5.68	5.64	HKAIH69
(DDQ)
Anthraquinone	9.05	LSS75	7.6		NSAFI88	1.5
Pyranthrone			5.83	5.71	HKAIH69
Violanthrone			5.10		KHHI70
				5.32	KLu
Indanthrone				5.10	KHI67
				5.17	KHHI70
				5.26	KLu



ELECTRON ACCEPTORS

Pyromellitic dianhydride (PMDA)	10.9*	GCD79	8.0�		ISSSI76	2.9
Tetracyanoethylene (TCNE)	11.7	ISFIOK74
Tetracyano-p-quinodimethane	9.5	ISFIOK74	7.4		St	2.1
(TCNQ)			7.88		NES74
Tetracyanonaphthoquinodimethane	8.5	ISSKKI	6.0		ISSKKI	2.5
(TNAP)		SSITH79			AAITH79
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


PHTHALOCYANINES AND PORPHYRINS

Metal-free-phthalocyanine( PC)	6.1*	B79	5.15		VZG63	0.95
				5.12	BL68
				5.15�	KC61
				5.20ｨ	P62
				5.05-5.22	KLu
			､6.0(error)!		VT60
			5.0		St1
Al-PC			5.0		VZG63
Ca-PC			5.00		KLu
Cu-PC	6.1*	B79	(a-form) 4.88		CSISQ83	1.2
			(b-form) 4.62		CSISQ83	1.5
			5.0		VZG63
				5.0ｨ	P62
Chlorinated Cu-PC			6.0		St1
Fe-PC	6.1*	B79	4.85		VZG63	1.25
				4.95�	KC61
				5.00ｨ	P62
Pb-PC	6.1*	B79		5.00	KLu	1.1
Mg-PC	6.1*	B79	4.75		VZG63	1.35
				4.96ｨ	P62
				4.85ｨ	P62a
				4.70	BBFA72
				4.80	BBFA72
Ni-PC	6.2*	B79	4.8		St1	1.4
				4.95�	KC61
Na-PC			5.1		St1
				4.94	KLu
Zn-PC	6.1*	B79	6.0(error)!		VT60
			5.2		St1	0.9?
Co-PC	6.1*	B79
Protoporphyrin			4.9		St1	1.2?
Tetraphenylporphyrine (TPP)	6.39v	KR75
Zn-TPP	6.2	KR75	5.0		SKIY80	1.2
Mg-TPP	6.3	KR75
			4.85		BA71a	1.5?
Ethioporphyrin				5.29�	KC61
Hemin			5.3		SKIY80
Chlorophyll a			(4.8)		VZG63
Chlorophyll b			5.25		NFI79
Cytochrome c			(oxidized) 6.1		KSHYI78
			(reduced)  5.8		KSHIY78
Cytochrome c3			(oxidized) 5.4		KSHYI78
			(reduced)  4.6		SKIY80
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


METALLOCENES

Ferrocene	6.72	RWBKHS72	5.4		RNM77	1.3
				5.75	MK70
Ruthenocene				6.15	MK70
Nickellocene	6.2	RWBKHS72
Decamethylferrocene	5.7	CGKPTRS80	4.7		RNM77	1.0
Decamethylnickellocene	4.4	CGKPTRS80



LONG ALKYL COMPOUNDS

Hexatriacontane			9.1		SHSH11K77
Stearic acid	(on In2O3: crystalline)			7.8		MTSSI85
	(on Cu)			8.1		MTSSI85
	(on Au: amorphous)			8.4		MTSSI85
Perfluoroundecanoic acid			8.5		MSI88
1,4-Bis-stearylaminoanthraquinone			6.0		NFSAI87
Tetrakis(ethylthia)TTF			5.15		STMWSI86
			5.00		YSIS87
Tetrakis(propylthia)TTF			4.94		Yu
Tetrakis(butylthia)TTF			4.83		Yu
Tetrakis(pentylthia)TTF			4.86		Yu
Tetrakis(hexylthia)TTF			4.83		Yu
Tetrakis(hepthylthia)TTF			4.89		Yu
Tetrakis(octylthia)TTF			4.80		STMWSI86
Tetrakis(nonylthia)TTF			4.65		STMWSI86
Tetrakis(decylthia)TTF			4.70		STMWSI86
			4.65		Yu
			4.60		YSIS87
Tetrakis(undecylthia)TTF			4.64		Yu
Tetrakis(dodecylthia)TTF			4.67		Yu
Tetrakis(tridecylthia)TTF			4.63		Yu
Tetrakis(tetradecylthia)TTF			4.7		STMWSI86
Tetrakis(pentadecylthia)TTF			4.71		Yu
Tetrakis(hexadecylthia)TTF			4.74		Yu
Tetrakis(heptadecylthia)TTF			4.69		Yu
Tetrakis(octadecylthia)TTF			4.85		STMWSI86



DIACETYLENE COMPOUNDS

2,4-Hexadiyne-1,6-bis(p-toluene sulfonate)			6.9ｨ	A82
				7.1	MSB82
Tricosa-10,12-diynoic acid			6.7		NFSAI87
DYES AND PIGMENTS

	#:	Compound cannot be identified definitely.
	#1:	Probably.
	#2:	Probably 3-allyl-3'-ethyl-5',6'-dimethyl-4-keto-5-[2-(4(1H)-dihydroauinolinylidene)- ethylidene]-thiazolinooxacyanine bromide.
	#3:	The figure in the original paper corresponds to 3-amino-2-p-methoxyphenylindene-1-one.
	#4:	Probably 1-oxo-3-oxido-2-pyridinioindene is a better structure reflecting the properties of this.
	#5:	The structural formula in the original paper corresponds to 3-phenylamino-2-phenylindenone-1.
	#6:	Probably victoria pure blue BO.

Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________

Alizaline Dyes

Alizarin blue	7.35	V60	5.4		KV61	1.9

Azine Dyes

Phenosafranine			5.4		KV61

Azo Dyes

Bismarck brown				5.5	Mt

Carotenoids

b-Carotene	6.5	DYVAM78	5.5､		VT60	1.0

Cyanines

Cyanine#				5.28	F30
Kryptocyanine				5.0	ABVT67
				4.2-3	N61
Pinacyanol	7.25ﾆ		4.9		VT60a	2.35
Pinacyanol (chloride)				4.6	N61
Pinakryptol yellow			5.4		KAB71
Quinoline blue#1	7.35	V60	4.5		KV61	2.85
(ethylcyanine)

3,3'-Diethylthiacyanine
	bromide			5.5		TYIISOTu
	perchlorate			5.4		TYIISOTu
	tosylate (p-toluene sulfonate)			5.65		TYIISOTu
3,3'-Diethylthiacarbocyanine				5.0	N61
	bromide			5.15		TYIISOTu
	perchlorate			5.05		TYIISOTu
	tosylate			5.27		TYIISOTu
3,3'-Diethylthiadicarbocyanine
	bromide			4.9		TYIISOTu
	perchlorate			4.9		TYIISOTu
	tosylate			5.1		TYIISOTu
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________

3,3'-Diethylthiatricarbocyanine
	bromide			4.7		TYIISOTu
	perchlorate			4.73		TYIISOTu
	tosylate			5.0		TYIISOTu
3,3'-Diethylenthiapentacarbocyanine				5.1	ABVT67
	iodide

3-Allyl-3'-ethyl-5,6'-dimethyl-4-keto-5-(1-dihydro-	4.8		KV61
quinolidene-4-ethylidene)thiazalinooxacyanine bromide#2

3,3'-Dimethyl-9,11,15,17-bis(b,b'-dimethyltri-		5.2	ABVT67
methylene)thiapentacarbocyanine iodide

1,1'-Dimethyl-10-phenyl-2,2'-carbocyanine bromide		4.6	N61

Furanquinone Pigments

8,13-dioxodinaphto[2,1-b:2',3'-d]furan-	(on Al)	6.45		PN72
6-(2-pyridyl)carboxamide		(on ox. Al)	6.3		PN72

Indene Derivatives

3-Amino-2-methoxyphenylindone-1#3			5.25		BA69
				5.50	GST73
2-Pyridino-1,3-indanedione (betaine)#4				5.75	NSS77
3-Phenylamino-2-phenylindone-1#5			5.35		BA69
				5.50	GST73
1-Phenylamino-2-phenylindene-i-thione-3			5.25	BA69
				5.25	GST73
trans-Bis-bindodiene#			4.80		BA69
			4.85	4.85	ABB71
Merocyanines

Merocyanine#	7.35	V60	5.6		KV61	1.75
3-Ethyl-5-(3-ethylbenzothiazolin-2-ylidene)rhodanine	5.55		TSIT86
3-Ethyl-5-[2-(3-ethylbenzothiazolin2-ylidene)-	5.10		TSIT86
ethylidene]rhodanine
3-Ethyl-5-[4-(3-ethylbenzothiazolin2-ylidene)-2-	4.85		TSIT86
butenylidene]rhodanine
3-Ethyl-5-[6-(3-ethylbenzothiazolin2-ylidene)-2,4-	4.75		TSIT86
hexadienylidene]rhodanine
3-Ethyl-5-{4-[3-(3-sulfopropyl)benzothiazolin-2-	4.80		TSIT86
ylidene]-2-butenylidene}rhodanine
3-Ethyl-5-[2-(3-ethylthiazolidin-2-ylidene)ethyl-	5.20		TSIT86
indene]rhodanine
3-Carboxymethyl-5-[2-(3-ethylthiazolidin-2-		5.20		TSIT86
ylidene)ylideneethylidene]rhodanine
5-[2-(1,3-Diethyl-5-chlorobenzimidazolin-2-		5.15		TSIT86
ethylidene]-3-hexylrhodanine
5-[2-(1,3-Diethyl-5-nitrobenzimidazolin-2-		5.20		TSIT86
ylidene)ethylidene]-3-hexylrhodanine
Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________

Oxazine Dyes

Nile blue A				5.17	Mt
Triphenodioxazine (TPDO)			4.94		SSNFKI86
DichloroTPDO			5.75		SSNFKI86

Thiazine Dyes

Methylene blue			5.4		KV61
				5.2	Mt
Triphenodithiazine(TPDT)			5.12		SSNFKI86
DichloroTPDT			5.61		SSNFKI86
TetrachloroTPDT				5.2	Mt

Triphenylmethane Dyes

Aurin			5.4､		VZG63
Crystal Violet			5.0		KV61
				 	3.45	Mt
					5.00	KLu
	(Br-)				5.0	N61
	(Cl-)				5.1	N61
	(acetate)				5.2	N61
Malachite green			5.2		KV61
	(Cl-)				5.2	N61
	(oxalate)				ca.5.2	N61
Night blue				4.7	Mt
Victoria pure blue 30#6				5.00	Mt
Fuchsin				4.15	F30
Basic fuchsin (Cl)				5.6%	N61

Viologen Dyes

Methyl viologen 	(reduced)			3.6		MKI76
	(oxidized)			4.8	4.8-9	MKI76

Xanthene Dyes

Erythrosine				5.5	VT60
Erythrosine (Na)				5.5%	N61
Rhodamin B				5.10ｨ	GR69
			5.1		KV61
Rhodamin 6G	7.26	V60	5.7		VT60	1.6

Others

Indigo red#	7.32	V60		5.0	KV61	1.3
Indigo blue	7.17	V60		5.4	KV61	1.7
Golden-orange indanthrene#				(5.3-5.8)	VZG63
Pinakryptol#			5.2､		VT60a
Yellow indanthrene#				(5.2-5.6)	VZG63
MOLECULAR COMPLEXES

	DDQ:	Dichlorodicyano-p-benzoquinone	PMDA:	Pyromellitic dianhydride
	TCNQ:	Tetracyanoquinodimethane	TMPD:	N,N,N',N'-Tetramethyl-p-phenylenediamine
	TNB:	1,3,5-Trinitrobenzene

Compound	Ig/eV	Ref.	Is/eV		Ref.	D/eV
			UPS	PQY etc.
________________________________________________________________________________


Organic-Organic Complexes
(Anthracene)(TNB)				(5.88)	BL68
(Anthracene)(TCNQ)			6.17		NES74
				5.03	BL68
(Anthracene)(PMDA)			6.00		KSSI82
			6.0		ISSSI76
				5.26	BL68
(Pyrene)(TNB)				5.60	BL68
(Pyrene)(TCNQ)				5.70	BL68
(1,2-Benzanthracene)(TCNQ)				5.00	BL68
(Chrysene)(TNB)				(5.50)	BL68
(Coronene)(Trinitrobenzene)				5.62	HKAIH69
(Perylene)(TNB)				(5.54)	BL68
(Perylene)(Dicyanomethylenetrinitrofluorene)		5.23	BL68
(Perylene)(p-Chloranil)				5.40	BL68
(Perylene)(o-Chloranil)				5.35	BL68
(Perylene)(TCNQ)				(5.50)	BL68  
(Perylene)(PMDA)				5.16	BL68
(Violanthrene)(o-Chloranil)				5.32�	KC61
(Carbazole)(TCNQ)			6.76		NES74
(Carbazole)(PMDA)			6.22		KSSI82
(Acridine)(PMDA)			6.3		KSSI82
(Phenothiazine)(o-Chloranil)				5.38�	KC61
(Phenothiazine)(PMDA)			5.41		KSSI82
(N-Methylphenazinium)(TCNQ)			6.0		NES74
(Bibenzophenothiazine)(DDQ)				4.99	HKAIH69
 (Bibenzophenothiazine)2(DDQ)				4.75	HKAIH69
(Tetrathianaphthacene)(TCNQ)2			4.75		AAB77
(Tetrathiafulvalene)(TCNQ)			(5.07)ﾀ		NES74
			(5.6)ﾀ		GPEMS74
(p-Phenylenediamine)(Chloranil)				5.4 	HVK68
(p-Phenylenediamine)(Bromanil)				5.4	HVK68
(TMPD)(p-Chloranil)				5.0	HVK68
				4.88	BL68
(TMPD)(p-Bromanil)				4.85	HVK68
				4.87	BL68
(TMPD)(TCNQ)	(from p-xylene)				4.86	BL68
	(from glacial acetic acid)			4.72	BL68
(1,6-Diaminopyrene)(o-Chloranil)				4.88	BL68
(1,6-Diaminopyrene)(p-Chloranil)				4.39	BL68
(1,6-Diaminopyrene)(p-Bromanil)				(4.65)	BL68
(1,6-Diaminopyrene)(TCNQ)				4.58	BL68
(Benzidine)(TCNQ)				5.03	BL68
(N,N,N',N'-Tetramethylbenzidine)(TNB)			4.72	BL68
(H2-Phthalocyanine)(o-Chloranil)				5.29�	KC61
(Fe-Phthalocyanine)(o-Chloranil)				5.32�	KC61
(Decamethylferrocene)(TCNQ)2			4.7		RNM77
(Quinolinium)(TCNQ)2			5.35		NES74
			4.85		HKAIH69



Inorganic-Organic Complexes

Li(TCNQ)			5.6		NES74
Na(Anthracene)				3	MKu
Na(o-Chloranil)				5.50	Mt
Na(TCNQ)			5.6		NES74
K(o-Chloranil)				5.35	Mt
K(TCNQ)			5.8		GPEMS74
Rb(Benzonitrile)				5.01	KTI70
				5.05	KI72
Rb(Benzonitrile) (+H2)				4.90	KTI70
Cs(Pyrene)				1.5	OIIH65
Cs(Perylene)			2.2		YSIu
Cs(Triphenylene)				2.40	KI72
Cs2(Triphenylene)				2.43	KI72
Cs(Violanthrene)				1.54	IH63
				2.95	ABS74
Cs(Tetranitropyrene)				1.8	OIIH65
Cs(Tetrachloropyrene)				1.8	OIIH65
Cs(Tetrabromopyrene)				1.8	OIIH65
Cs(Tetracyanopyrene)				1.3	OIIH65
Cs2(TCNQ)3				3.0	LSS75a

NH4(TCNQ)			4.9		SKSI75
NOTES

Gas phase

	*:	Value read from the reported spectrum.
	v:	Vertical ionization energy.
	^:	Value determined from photoionization experiment.

Solid state

	�:	Raw value determined from photoemission quantum yield measurements.
		(Those authors also reported values corrected for estimated surface/bulk difference effects).
	( ):	Values claimed to be dubious by the authors.
	?:	Dubious values.
	ﾄ:	Value for a single crystal.
	ｨ:	Millikan method.
	!:	Stated to be erroneous in VZG63.
	ﾆ:	Cast doubt on the possibility of decomposition by Nelson [N67].
	､:	Photoelectron spectrum is rather featureless.
	%:	Resolution is reduced to 0.4 eV due to low light intensity.
	ﾀ:	Cast doubt on the possibility of different surface composition from the bulk [LSS75, NSE75].
REFERENCES

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電子親和力

固体物性研究の観点から関心がもたれると思われる有機化合物を中心として、実験によって決められた孤立分子の電子親和力の値を集めた。
データの収集にあたっては、十年ほど前に相次いで総説（たとえば、後に掲げる文献のうち DMB84, KC87, JB87, LBLHLM88, CW89 など）が出版されて以来、この方面の研究がクラスターを含むイオンやラジカルなどに向かったため、実質的にはあまりデータが増えていないことを踏まえて、それらの総説中に取り上げられた物質とその値を主に選んだ。
ただし、近年、アメリカの National Institute of Standards and Technology (NIST) が種々のデータべースを構築している中に S. G. Lias らが編集している電子親和力のデータベースも存在するので、その最新（1998 年 11 月）版の内容もチェックしたうえで必要に応じてデータを NIST98 からの引用として加えた。

いうまでもなく、電子親和力の実験的な決定方法は次頁に示すように一通りではない。そのため、方法の違いによって得られる値には偏差が認められる場合がある。また、同じ方法を用いたとしても測定装置に依存する誤差要素が異なりうる。これらの結果として、同一物質に対する報告値が広い範囲にわたってばらつく場合も少なくない。そこで、今回収集したデータにはなるべくその決定方法や誤差を記すこととし、また、複数の値が報告されている場合には、一応の評価を行って selected value を示すことにした。ただし、このような作業は実は膨大な労力を要するものであるため、決して十分に行えたとはいえない状況にある。なお、上述の NIST のデータベースについては、収録されている値の出典が明示されていないため、その評価は必ずしも容易ではないことを付記しておく。

分子とその負イオンとの間に起こる電子の付着／脱着過程を考えると、分子の電子親和力の値には断熱値（adiabatic electron affinity, Aa）、垂直脱着値（vertical detachment electron affinity, Adv）、垂直付着値（vertical attachment electron affinity, Aav）の三種類がある。そして、しばしばこれらの間には Adv > Aa > Aav の関係が認められる。今回収集したデータがこれらのどれに当たるかを本来は明確に示すべきだが、それには値のそれぞれについて少なくとも原報を調べる必要があり、そこまでは手が回らなかった。ただし、どの電子親和力に当たるのか示したものが一部にはあり、また測定方法の判明している値については、次頁に記す方法の特徴から求まる値の素性が分かるものもある。【電子親和力の測定方法】

略号	方法名  →  主に求まる値	《参考文献》
	（英語名称）


CD (or CI)	衝突脱離（イオン化）法 → Adv	《JB79》
	（Collisional detachment; Collisional ionization technique）

CT (or ECT)	（吸熱）電荷移動法 → Adv	《JB79》
	（Charge transfer; Endothermic charge-transfer）

CTS	電荷移動吸収分光法［溶液法］ → Av	《CW75》
	（Charge-transfer spectroscopic method in solution）

EC (or ECD)	電子捕獲法 → Aa	《CW89》
	（Electron capture; Electron capture detector technique）

ET	電子透過（分光）法 → Aa	《JB87》
	（Electron transmission）

ETE	電子移動平衡法 → Aa	《KC87》
	（Electron transfer equilibrium）

HWRP	半波還元電位［溶液法］→ Aa	《CW89》
	（Half-wave reduction potential method in solution）

LPES	レーザー光電子分光法 → Adv	《HL85》
	（Laser photoelectron spectroscopy）

LPT (or LPD)	レーザー光脱離閾値法 → Adv	《HL85》
	（Laser photodetachment threshold; Laser photodetachment technique）

MT (or M)	マグネトロン法 → Aa	《CW89》
	（Magnetron method）

PT	光脱離閾値法 → Adv	《HL85》
	（Photodetachment threshold）
【化合物別の収録順序（電子親和力）】


	SIMPLE INORGANIC COMPOUNDS
		Diatomic molecules
		Triatomic molecules
		Polyatomic molecules
	SIMPLE ORGANIC COMPOUNDS
		Methane derivatives
		Benzophenone derivatives
		Alkene derivatives
		Alkyne derivatives
	AROMATIC HYDROCARBONS AND THEIR DERIVATIVES
		Benzene derivatives
		Naphthalene derivatives
		Anthracene derivatives
		Others
	QUINONES AND THEIR DERIVATIVES
		Benzoquinone derivatives
		Naphthoquinone derivatives
		Anthraquinone derivatives
	NONBENZENOID COMPOUNDS
	HETEROCYCLIC COMPOUNDS

	REFERENCES

Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

SIMPLE INORGANIC COMPOUNDS

Diatomic molecules
O2	0.440(8)	LPES	DMB84
S2	1.670(15)	LPES	DMB84
Se2	1.96(5)	LPT	SCMFB89
Te2	1.92(7)	LPES	DMB84
NO	0.024(10)	LPES	DMB84
F2	3.08(10)	CT	DMB84
Cl2	2.38(10)	CT	DMB84
Br2	2.55(10)	CT	DMB84
I2	2.55(5)	CT	DMB84
IBr	2.55(10)	CT	DMB84

Triatomic molecules
CS2	0.895(20)	LPES	OE
NO2	2.275(25)	LPT	DMB84	selected value
	2.30	ETE	KC87
N2O	ｲ1.465	CT	DMB84
O3	2.1028(25)	LPT	DMB84
SO2	1.097(36)	LPES	CBH74
	1.107(8)	LPES	NE	selected value
S2O	1.877(8)	LEPS	NE
SeO2	1.83(5)	LPES	SCMFB89

Polyatomic molecules
Fe(CO)2	1.22(2)	LPES	DMB84
Fe(CO)3	1.8(2)	LPES	DMB84
HNO3	0.57(15)	CD	DMB84
Ni(CO)2	0.643(14)	LPES	DMB84
Ni(CO)3	1.077(13)	LPES	DMB84
SF6	0.5 - 0.8	CD	CW89
	1.05(10)	ETE	GCK85
	1.15(15)	EC	CW89
	1.10(10)		CW89	selected value
	1.4(4)	MT	CW89
PCl3	0.82(10)	CD	DMB84
PBr3	1.59(15)	CD	DMB84
SO3	ｳ1.70(15)	CD	DMB84
C60	2.6-2.8		YPCCS87
	2.650(50)	LPD	WCJS91
C72	3.300		NIST98
C78	3.010		NIST98
C80	3.700		NIST98
C84	3.050		NIST98
Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

SIMPLE ORGANIC COMPOUNDS

Methane derivatives
CH3CN	ﾐ2.84		LBLHLM88
CH3I	0.2(1)	CT	DMB84
CH3NO2	0.44(20)	CD	DMB84
	0.45(10)	EC	CW89	selected value
	0.48(10)	ETE	KC87
CH2Cl2	1.31(5)	MT	CW89
CHCl3	1.70(5)	MT	CW89	selected value
	1.76		LBLHLM88
CCl4	2.0(2)	CT	CW89
	2.06(10)	MT	CW89	selected value
	2.08(20)	CT	CW89

Benzophenone derivatives
Benzophenone	0.64(5)	EC	CW89	selected value
	0.65(10)	CT	CW89
4-Fluorobenzophenone	0.64(5)	EC	CW89
	0.65(5)		CW89	selected value
	0.66(10)	CT	CW89
4-Bromobenzophenone	0.90		CW89
4-Chlorobenzophenone	0.8(1)	EC	CW89
	0.84(10)	CT	CW89	selected value
4-Iodobenzophenone	1.00		CW89
4-Methoxybenzophenone	0.64		CW89
Perfluorobenzophenone	1.61		LBLHLM88

Alkene derivatives
Ethylene	ﾐ1.3		JB87	adiabatic value
	ﾐ1.74		JB87	vertical value
Trichloroethylene	0.400		NIST98
1,1-Diphenylethylene	0.390		NIST98
Maleic anhydride	1.4(2)	CD	DMB84
	1.42(10)		CW89	selected value
	1.44(10)	CT	CW89
trans-Dicyanoethylene	0.78(10)	MT	CW89
	1.0(2)		CW89
	1.24(10)	ETE	KC87	selected value
Tetracyanoethylene	2.3(3)	PT	DMB84
	2.88(5)	MT	FP67
	2.90(10)	CTS	CW89	selected value
	3.17(10)	ETE	CK86
trans-2-Butene	ﾐ2.10		LBLHLM88
Butadiene	ﾐ0.62	ET	JB87
Hexacyanobutadiene	3.24(7)	MT	CW89
Cyclohexene	ﾐ2.13	ET	JB87
Cyclooctatetraene	0.60		CW89
1,3-Cyclopentadiene	ﾐ1.05		LBLHLM88

Alkyne derivatives
Acetylene	ﾐ2.6	ET	JB78
Compound	Ag/eV	Method	Ref.	Comment
_______________________________________________________________________________

AROMATIC HYDROCARBONS AND THEIR DERIVATIVES

Benzene derivatives
Benzene	0.72	EC	CW89	adiabatic value
	ﾐ1.15	ET	CW89	vertical value
tert-Butylbenzene	ﾐ1.06		LBLHLM88
Bromobenzene	ﾐ0.70		LBLHLM88
Chlorobenzene	ﾐ0.75		LBLHLM88
o-Dichlorobenzene	0.09		CW89
p-Dichlorobenzene	0.18		CW89
Pentachlorobenzene	0.729		NIST98
Hexachlorobenzene	0.915		NIST98
o-Dicyanobenzene	0.95(10)	CT	CW89
	1.0(1)		CW89	selected value
	1.04(10)	MT	CW89
p-Dicyanobenzene	1.10		CW89
Fluorobenzene	ﾐ0.89		LBLHLM88
1,2,3,5-Tetramethylbenzene	0.108		NIST98
1,2,4,5-Tetramethylbenzene	0.048		NIST98
Pentamethylbenzene	0.182		NIST98
Hexamethylbenzene	0.121		NIST98
Nitrobenzene	>0.7(2)	CT	DMB84
	>0.8(2)	EC	CW83
	1.01(10)	CT	CW89	selected value
o-Dinitrobenzene	1.65		CW89
m-Dinitrobenzene	1.62		CW89
p-Dinitrobenzene	1.96		CW89
o-Bromonitrobenzene	1.17		CW89
m-Bromonitrobenzene	1.32		CW89
p-Bromonitrobenzene	1.29		CW89
o-Chloronitrobenzene	1.12		CW89
m-Chloronitrobenzene	1.28		CW89
p-Chloronitrobenzene	1.26		CW89
m-Cyanonitrobenzene	1.53		CW89
p-Cyanonitrobenzene	1.72		CW89
m-Fluoronitrobenzene	1.22		CW89
p-Fluoronitrobenzene	1.11		CW89
m-Methoxynitrobenzene	1.04		CW89
p-Methoxynitrobenzene	0.91		CW89
m-(Trifluoromethyl)nitrobenzene	1.41		CW89
2,3-Dimethylnitrobenzene	0.81		CW89
2,6-Dimethylnitrobenzene	0.71		CW89
3,4-Dimethylnitrobenzene	0.89		CW89
1,3,5-Trichlorobenzene	0.34		CW89
1,2,4,5-Tetrachlorobenzene	0.45		CW89
1,2,4,5-Tetracyanobenzene	2.15(22)	MT	CW89
1,4-Dicyanotetrafluorobenzene	1.89		CW89
Pentafluorobenzene	0.434		NIST98
Hexacyanobenzene	2.48(13)	MT	CW89
Hexafluorobenzene	0.52(10)	CT	CGHK86
	0.86(3)	EC	CW89	selected value
	1.20(8)	MT	CW89
Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

(Trifluoromethyl)benzene	0.002		NIST98
Acetophenone	0.34		CW89
p-Cyanoacetophenone	1.13		LBLHLM88
o-Nitroacetophenone	1.38		LBLHLM88
m-Nitroacetophenone	1.31		LBLHLM88
p-Nitroacetophenone	1.55		LBLHLM88
Aniline	ﾐ1.13		LBLHLM88
m-Nitroaniline	0.95		LBLHLM88
N,N-Dimethyl-3-nitroaniline	0.95		CW89
Anisole	ﾐ1.09		LBLHLM88
Benzaldehyde	0.41		CW89
m-Phthalaldehyde	0.971		NIST98
m-Cyanobenzaldehyde	1.00		LBLHLM88
p-Cyanobenzaldehyde	1.22		LBLHLM88
o-Nitrobenzaldehyde	1.51		LBLHLM88
m-Nitrobenzaldehyde	1.41		LBLHLM88
p-Nitrobenzaldehyde	1.67		LBLHLM88
Benzonitrile	0.24		CW89
o-Nitrobenzonitrile	1.61		LBLHLM88
m-Nitrobenzonitrile	1.56		LBLHLM88
p-Nitrobenzonitrile	1.72		LBLHLM88
2,6-Dinitrobenzonitrile	0.72		LBLHLM88
3,5-Dinitrobenzonitrile	2.16		LBLHLM88
Pentafluorobenzonitrile	0.94		LBLHLM88
Toluene	ﾐ1.11		LBLHLM88
o-Nitrotoluene	0.92		CW89
m-Nitrotoluene	0.8(2)	EC	CW89
	0.99(10)	CT	CW89	selected value
p-Nitrotoluene	0.95		CW89
Octafluorotoluene	>1.7(3)	CT	DMB84
Phenol	ﾐ1.01		LBLHLM88
o-Xylene	ﾐ1.12		LBLHLM88
m-Xylene	ﾐ1.06		LBLHLM88
p-Xylene	ﾐ1.07		LBLHLM88
Biphenyl	ﾐ0.3		LBLHLM88
o-Nitrobiphenyl	1.07		CW89
p-Nitrobiphenyl	1.20		CW89
Perfluorobiphenyl	0.91		LBLHLM88
Phthalic anhydride	1.21		CW89
Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

Naphthalene derivatives
Naphthalene	0.15		CW89
1-Chloronaphthalene	0.28		CW89
1-Ethylnaphthalene	0.147		NIST98
2-Ethylnaphthalene	0.195		NIST98
1-Methylnaphthalene	0.160		NIST98
2-Methylnaphthalene	0.143		NIST98
1-Naphthalenecarbonitrile	0.6765		NIST98
1-Naphthalenecarboxaldehyde	0.681		NIST98
2,3-Dimethylnaphthalene	0.173		NIST98
2,6-Dimethylnaphthalene	0.160		NIST98
1-Naphthaldehyde	0.68(3)	EC	CW89
	0.69(3)		CW89	selected value
	0.70(10)	CT	CW89
2-Naphthaldehyde	0.62(3)	EC	CW89
	0.63(3)		CW89	selected value
	0.65(10)	CT	CW89
1-Nitronaphthalene	1.23		CW89
2-Nitronaphthalene	1.18		CW89
1,3-Dinitronaphthalene	1.78		LBLHLM88
1,5-Dinitronaphthalene	1.77		LBLHLM88

Anthracene derivatives
Anthracene	0.56(5)	EC	CW89
	0.57(5)		CW89	selected value
	0.60(10)	CT	CW89
1-Chloroanthracene	0.78		CW89
2-Chloroanthracene	0.75		CW89
9-Chloroanthracene	0.86		LBLHLM88
9-Cyanoanthracene	1.27		LBLHLM88
9-Nitroanthracene	1.43		LBLHLM88
Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

Others
Phenanthrene	0.31		CW89
Naphthacene	0.88		CW89
Chrysene	0.41		CW89
Triphenylene	0.29		CW89
Benz[a]anthracene	0.64		CW89
Benzo[c]phenanthrene	0.54		CW89
Pyrene	0.56		CW89
Dibenz[a,h]anthracene	0.64		CW89
Dibenz[a,j]anthracene	0.64		CW89
Pentacene	1.392		NIST98
Perylene	0.350		NIST98
Benzo[a]pyrene	0.67		CW89
Benzo[e]pyrene	0.534		NIST98
Picene	0.542		NIST98
Benzo[ghi]perylene	0.420		NIST98
Coronene	0.540		NIST98
Indene	0.173		NIST98
Biphenylene	0.890		NIST98
Fluorene	0.278		NIST98
Acenaphthylene	0.403		NIST98
Fluoranthene	0.63		CW89


QUINONES AND THEIR DERIVATIVES

Benzoquinone derivatives
o-Benzoquinone	1.620		NIST98
p-Benzoquinone	1.34(9)	MT	CW89
	1.89(30)	CD	DMB84
	1.91(10)	CT	CW89	selected value
	1.92(10)	CT	CW89
Methyl-p-benzoquinone	1.85		CW89
Phenyl-p-benzoquinone	2.04		CW89
tert-Butyl-p-benzoquinone	1.88		CW89
2,6-Di(tert-butyl)-p-benzoquinone	1.88		CW89
2,5-Dichloro-p-benzoquinone	2.41		CW89
2,6-Dichloro-p-benzoquinone	2.48		CW89
2,5-Dimethyl-p-benzoquinone	1.77		CW89
Trimethyl-p-benzoquinone	1.63		CW89
Tetrafluoro-p-benzoquinone	2.27	MT	CW89
	2.45(10)	CT	CW89
	2.6(1)		CW89	selected value
	2.70(10)	CT	CW89
	2.92(20)	CD	DMB84
Tetrachloro-o-benzoquinone	2.440		NIST98
Tetrachloro-p-benzoquinone	2.40(26)	MT	CW89
	2.7(1)		CW89	selected value
	2.76(20)	CD	DMB84
	2.77(10)	CT	CW89
	2.78(10)	CT	CW89
Tetrabromo-p-benzoquinone	2.44(20)	CD	DMB84
Compound	Ag/eV	Method	Ref.	Comment
________________________________________________________________________________

Tetracyano-p-quinodimethane	2.80(10)	MT	CW89
	2.80(10)	CD	CW89
	2.80(3)	CD	CW89
	2.8(3)	CD	DMB84
	2.82(10)		CW89	selected value
	2.83(18)	MT	CW89
Tetrafluorotetracyano-p-quinodimethane	3.38(10)		CW89

Naphthoquinone derivatives
1,4-Naphthoquinone	1.81		CW89
2,3-Naphthoquinone	2.19		LBLHLM88
2-Methyl-1,4-naphthoquinone	1.74		CW89

Anthraquinone derivatives
9,10-Anthraquinone	1.15(10)	MT	CW89
	1.59		CW89	selected value
2-tert-Butyl-9,10-anthraquinone	1.56	ETE	HCSK88
2-Ethyl-9,10-anthraquinone	1.56	ETE	HCSK88


NONBENZENOID COMPOUNDS

Azulene	0.69(5)	EC	CW89	selected value
	0.69(10)	CT	CW89


HETEROCYCLIC COMPOUNDS

Pyrrole	ﾐ2.38		LBLHLM88
Furan	ﾐ1.76		LBLHLM88
Thiophene	ﾐ1.17		LBLHLM88
Pyridine	ﾐ0.62		LBLHLM88
2,3,5,6-Tetracyanopyridine	1.59(10)	CT	CW89
	2.12(17)	MT	CW89	selected value
	2.17		CW89
Pentafluoropyridine	0.681		NIST98
Pyridazine	0.250		NIST98
Pyrazine	0.400		NIST98
1,3,5-Triazine	0.450		NIST98
Acridine	0.906		NIST98
Phenazine	1.305		NIST98
REFERENCES

[CBH74]	R. J. Cellota, R. A. Bennet and J. L. Hall, J. Chem. Phys. 60 (1974) 1740.
[CGHK86]	S. Chowdhury, E. P. Grimsrud, T. Heinis and P. Kebarle, J. Am. Chem. Soc. 108 (1986) 3630.
[CK86]	S. Chowdhury and P. Kebarle, J. Am. Chem. Soc. 108 (1986) 5453.
[CW75]	E. C. M. Chen and W. E. Wentworth, J. Chem. Phys. 63 (1975) 3186
[CW83]	E. C. M. Chen and W. E. Wentworth, J. Phys. Chem. 87 (1983) 45.
[CW89]	E. C. M. Chen and W. E. Wentworth, Mol. Cryst. Liq. Cryst. 171 (1989) 271.
[DMB84]	P. S. Drzaic, J. Marks and J. I. Brauuman, in: Gas Phase Ion Chemistry, Vol. 3, (ed.) M. T. Bowers (Academic Press, Orlando, 1984), p. 167.
[FP67]	A. L. Farragher and F. M. Page, Trans. Faraday Soc. 63 (1967) 2369.
[GCK85]	E. P. Grimsrud, S. Chowdhury and P. Kebarle, J. Chem. Phys. 85 (1985) 1059.
[HCSK88]	T. Heinis, S. Chowdhury, S. Scott and P. Kebarle, J. Am. Chem. Soc. 110 (1988) 400.
[HL85]	H. Hotop and W. C. Lineberger, J. Phys. Chem. Ref. Data, 14 (1985) 731.
[JB78]	K. D. Jordan and P. D. Burrow, Acc. Chem. Res. 11 (1978) 341.
[JB79]	B. K. Janousek and J. I. Brauman, in: Gas Phase Ion Physics, Vol. 2, M. T. Bowers (ed.), (Academic Press, New York, 1979), ch. 10.
[JB87]	K. D. Jordan and P. D. Burrow, Chem. Rev. 87 (1987) 557.
[KC87]	P. Kebarle and S. Chowdhury, Chem. Rev. 87 (1987) 513.
[LBLHLM88]	S. G. Lias, J. E. Bartmess, J. F. Liebman, J. L. Holmes, R. D. Levin and W. G. Mallard, J. Phys. Chem. Ref. Data, Suppl. 17(1) (1988).
[NE]	M. E. Nimlos and G. B. Ellison, unpublished results.
[NIST98]	NIST Standard Ref. Database 69 (1998).
[OE]	M. M. Oakes and G. B. Ellison, unpublished results.
[SCMFB89]	J. T. Snodgrass, J. V. Coe, K. M. McHugh, C. B. Friedhoff and K. H. Bowen, J. Phys. Chem. 93 (1989) 1249.
[WCJS91]	L.-S. Wang, J. Conceicao, C. Jin and R. E. Smalley, Chem. Phys. Lett. 182 (1991) 5.
[YPCCS87]	S. H. Yang, C. I. Pettiette, J. Conceicao, O. Cheshnovsky and R. E. Smalley, Chem. Phys. Lett. 139 (1987) 233.