期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 104, 期 37, 页码 8577-8582出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp001676j
关键词
-
The excited-state dipole moments of several structurally related 7-aminocoumarin derivatives, used as laser dyes and in nonlinear applications, have been measured directly by following time-resolved changes in photoinduced microwave dielectric absorption. The dipole moments of the systems in the fluorescent state lie between 8.1 and 11.9 D, and the changes in the dipole moment on electronic excitation range between 1.7 and 6.1 D. Further, the excited-state dipole moment of any given system is found to be almost the same in benzene and in 1,4-dioxane. The results unambiguously suggest that these aminocoumarins fluoresce from the locally excited state and not from a zwitterionic or twisted intramolecular charge-transfer state, as often indicated in the literature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据