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41.
对双(苯并噁唑)茋化合物在不同极性溶剂中的光谱、光物理及光顺反异构化问题进行了详细研究.在测定其荧光寿命及荧光量子产率基础上计算出它们的辐射及非辐射衰变速度常数.发现化合物(1)在极性溶剂中有较高的荧光量子产率,而在非极性溶剂中则有较高的异构化能力.工作还测定了化合物在两种溶剂中反顺异构化过程的活化能,并对所得结果进行了初步讨论. 相似文献
42.
The absorption spectra, fluorescence spectra and photoconduction of some systems com-posed of different cyano-containing olefinic compounds and N, N-dimethyl-p-toluidine (DMT)have been studied in this paper. The experimental results show that the exciplex emissionspectra can be observed when the systems of acrylonitrile (AN) or methacrylonitrile (MAN)with DMT are illuminated, whereas the exciplexes between trans-1, 2,-dicyanocthylene(DCNE) or tetracyanoethylene (TONE) with DMT could not be found from the spectra dueto their large ionization. The measurements of photoconduction provide further a clear andunambiguous evidence for the ionization of the systems mentioned above, and they are thesupplement to the systems studied here. 相似文献