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Citation: Zhou Li-Li, Jiang Yong-Cai, Ju Wei-Gang, Zhang Xiao-Hong, Wu Shi-Kang. Emission Behavior of Non-Planar Intra-Molecular Conjugated Charge Transfer Compounds[J]. Acta Physico-Chimica Sinica, ;2003, 19(07): 670-674. doi: 10.3866/PKU.WHXB20030722 shu

Emission Behavior of Non-Planar Intra-Molecular Conjugated Charge Transfer Compounds

1.
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing　100101

Received Date: 30 December 2002
Available Online: 15 July 2003

Two kinds of intra-molecular conjugated charge transfer compounds 2,3-dicyano-5,7-bis[2-[4-dimethylamino-phenyl]ethenyl]-6H-1,4-diazepine(1) and 2,3-dicyano-5- phenyl-7-[2-(4-dimethylamino-phenyl)ethenyl]-6H-1,4-diazepine(2) are synthesized and studied in this work. From the literature it is well known by the calculation of quantum chemistry that the molecular structure of these compounds is the non-planar one. The solvato-chromic behaviors of these compounds are studied in solvents with different polarity in detail. Results indicate that the peak wavelengths of fluorescence spectra of these compounds in solution are linear related with the empirical parameter of solvent polarity ET(30) in certain kinds of solvents. Compared with the double arm’s conjugated compound (1), the single arm’s conjugated compound (2) shows itself the larger Stoke’s shift and larger dipole moment difference. The results have been discussed preliminary.
- Diazepines;Non-planar intra-molecular conjugated charge transfer compounds;Fluorescence spectrum;Solvato-chromism
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