Solvent effect on the photochemical properties of symmetrically substituted trans-3,3′,5,5′-tetramethoxystilbene
Solvent effect on the photochemical properties of symmetrically substituted trans-3,3′,5,5′-tetramethoxystilbene
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DOI：
10.1021/jp065075p
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发表时间：
2006-11-23
影响因子：
2.9
通讯作者：
Arai, Tatsuo
中科院分区：
文献类型：
--
作者：
Hayakawa, Junpei;Ikegami, Masashi;Arai, Tatsuo
研究了反式-3，3‘，5，5’-四甲氧基二苯乙烯(TMST)在不同极性溶剂中的光化学性质。研究发现，反式TMST的斯托克斯位移随溶剂极性的增加而增大。反式TMST在环己烷中的荧光寿命为2.3 ns，在乙腈中的荧光寿命为16.6 ns。这些结果表明，反式TMST分子的激发单重态具有电荷转移(CT)特征。在此基础上，讨论了一种水溶性TMST树状大分子的内部极性环境。
Photochemical properties of trans-3,3', 5,5'-tetramethoxystilbene (TMST) have been studied in various polar solvents. The Stokes shift of trans-TMST was found to be increased with increasing solvent polarity. The fluorescence lifetime of trans-TMST experienced a large solvent effect changing from 2.3 ns in cyclohexane to 16.6 ns in acetonitrile. These results indicate that the excited singlet state of trans-TMST has a charge-transfer (CT) character. On the basis of the obtained results, the interior polar environment of a water-soluble TMST dendrimer is discussed.