Structural Features for Fluorescing Present in Methoxycoumarin Derivatives.
作者:Akira TAKADATE、Toshinobu MASUDA、Chiyomi MURATA、Miki SHIBUYA、Akihiko ISOBE
DOI:10.1248/cpb.48.256
日期:——
Structural features of fluorescent methoxycoumarins were examined from the viewpoint of substituent effect and ring structure in connection with intramolecular charge-transfer (ICT). The fluorescence of methoxycoumarins depended primarily upon the ICT from a C6-electron-donating group to the substituents at the C3-position of the coumarin ring. Furthermore, the presence of a lactone ring itself, including a carbonyl group, cyclic ether oxygen and ethylenic bond as parital ring structures, was found to be essential for fluorescing in methoxycoumarins according to the fluorescent behaviors of chemically deformed model compounds.
从取代基效应和与分子内电荷转移(ICT)相关的环结构的角度研究了荧光甲氧基香豆素的结构特征。甲氧基香豆素的荧光主要取决于从 C6 给电子基团到香豆素环 C3 位取代基的 ICT。此外,根据化学变形模型化合物的荧光行为,发现内酯环本身(包括羰基、环醚氧和烯键作为部分环结构)的存在对于甲氧基香豆素中的荧光至关重要。