Electronic spectroscopy and photochromic mechanism of bis-Schiff bases, N, N′-bis(2-hydroxy-l-naphthylidene)-l, 4-phenyldiamine |
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| Authors: | Yangfu Ming Zhennian Huang Meigong Fan Bao’an Xu Sheng Jin Side Yao |
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| Institution: | (1) Institute of Photographic Chemistry, Chinese Academy of Sciences, 100101 Beijing, China;(2) Department of Chemistry, Peking University, 100871 Beijing, China;(3) Department of Chemistry, Peking University, 100871 Beijing, China;(4) Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, 201800 Shanghai, China |
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| Abstract: | The steady state and transient state absorption spectra and fluorescence spectra of N, Ń-bis(2-hydroxy-1-naphthylidene)-1,
4-phenyldiamine (BNP) in cyclohexane and acetonitrile were determined. The photochromic mechanism was discussed. In nonpolar
solvents, BNP exists mainly in the enol form and has the absorption maximum in the UV region. In polar solvents, however,
both the enol and proton transfer tautomer are formed, but the former is the main one. Fluorescence emissions result from
the excited state of proton transfer product.
Project supported by the National Natural Science Foundation of China and the Foundation of Chinese Academy of Sciences. |
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| Keywords: | absorption spectroscopy fluorescence spectroscopy N N′ -bis(2-hydroxy-l-mphthylidene)-1 4-phenyldiamine |
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