Dynamics of proton transfer in 7-azaindole
Dynamics of proton transfer in 7-azaindole
复制标题
7-氮杂吲哚中的质子转移动力学
DOI：
10.1016/0022-2313(91)90105-5
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发表时间：
1991
影响因子：
3.6
通讯作者：
R. Hochstrasser
中科院分区：
文献类型：
--
作者：
P. E. Share;M. Pereira;M. Sarisky;S. T. Repinec;R. Hochstrasser
标题化合物作为光诱导质子易位的范例已被广泛研究，光诱导质子易位是生物系统中光诱变的一种机制。使用飞秒荧光门控和瞬态吸收技术测量了 7-氮杂吲哚二聚体中质子转移的时间依赖性。发现质子化和氘化化合物的激发态反应的时间常数分别为 1.4 和 4.0 ps。瞬态吸收测量显示在激光脉冲的时间尺度上基态互变异构体的形成，表明导致基态互变异构体形成的竞争途径。
The title compound has been widely investigated as a paradigm for photoinduced proton translocation, a mechanism proposed for photomutagenesis in biological systems. The time dependence of proton transfer in 7-azaindole dimers has been measured using femtosecond fluorescence gating and transient absorption techniques. The excited state reaction is found to occur with a time constant of 1.4 and 4.0 ps for the protonated and deuterated compound, respectively. The transient absorption measurements show the formation of the ground state tautomer on the timescale of the laser pulse, suggesting competing pathways leading to formation of the ground state tautomer.