Photoinduced Charge-Transfer Association of Tetracyanoquinodimethane with Aminobiphenyls

Bulletin of the Korean chemical society

Myung-Ae Chung¹  Sang-Don Jung¹  Dae Won Cho¹  Yong Hee Kim¹  Ki Dong Song¹ 

关键词: Photoinduced electron transfer;    7;    7';    8;    8'-Tetracyanoquinodimethane (TCNQ);    4-Aminobiphenyl;    2-Aminobiphenyl;    Benzidine;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 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 TCNQ2? species, respectively. These bands grow quickly upon photoirradiation, 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.

【 授权许可】

Unknown