Photoinduced charge-transfer association of tetracyanoquinodimethane with aminobiphenyls

被引:0
作者
Department of Chemistry, Chosun University, Gwangju 501-759, Korea, Republic of [1 ]
不详 [2 ]
机构
[1] Department of Chemistry, Chosun University
[2] IT Convergence Research Laboratory, ETRI
来源
Bull. Korean Chem. Soc. | 2008年 / 5卷 / 948-952期
关键词
2-Aminobiphenyl; 4-Aminobiphenyl; 7,7′,8,8′- Tetracyanoquinodimethane (TCNQ); Benzidine; Photoinduced electron transfer;
D O I
10.5012/bkcs.2008.29.5.948
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学科分类号
摘要
The molecular association of acceptors with electron donors is studied in the highly-polar solvent CH3CN. Tetracyanoquinodimethane (TCNQ) forms a stable charge-transfer complex with donor molecules such as 4-aminobiphenyl (4-AB), benzidine (BD) and 2-aminobiphenyl (2-AB) with high association constants. The complexes of TCNQ with 4-AB or BD show new absorption bands at around 800 and 500 nm, which can be identified as reduced TCNQ•- and TCNQ 2- species, respectively. These bands grow quickly upon photo-irradiation, implying that the charge-transfer complexes are easily formed in an excited state. Conversely, a small spectral manifestation of the charge transfer was observed in the case of 2-AB complex. It is demonstrated that the structural orientation between the geminate ion pairs could play an important role in building a stable complex.
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页码:948 / 952
页数:4
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