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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetic Study of Hydrogen Bonded Exciplex Formatin of N_9-methyl Harmane
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Kinetic Study of Hydrogen Bonded Exciplex Formatin of N_9-methyl Harmane

机译：N_9-甲基Harmane氢键键合形成的动力学研究

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摘要

The kinetics of exciplex formation of N_9-methyl-1-mehtyl-9H-pyrido[[3,4-b]indole, MHN, in th presence of the proton donor hexafluoro2-propanol, HFIP, in cyclohexane has been studied by UV-vis, steady-state, and time-resolved fluorescence measurements. The results conclusively show the formation of a 1:2 ground-state proton-transfer hydrogen bonded complex, PTC, between the pyridinic nitrogen of the substrate and the proton donor the formation of these complexes is a necessary prerequisite for the exciplex to be observed. Thus, upon excitation of PTC, an excited-state equilibrium is established between PTC and a cation like exciplex, CL, #gamma#_(em). 410 nm. This excited-state reaction is assisted by a proton donor molecule. From the analysis of the multiexponential decays, measured at different emission wavelengths and as a function of HFIP concentration, the excited-state kinetics of this phototautomeric process has been analyzed in detail.
机译：通过质子供体六氟2-丙醇HFIP在环己烷中的存在，研究了N_9-甲基-1-甲基-9H-吡啶基[[3,4-b]吲哚MHN激基复合物形成的动力学。可见光，稳态和时间分辨荧光测量。结果最终表明，在底物的吡啶氮和质子供体之间形成了1：2的基态质子转移氢键结合的化合物PTC，形成这些配合物是观察激基复合物的必要先决条件。因此，在激发PTC时，在PTC与像激基复合物，CL，＃gamma #_（em）之类的阳离子之间建立了激发态平衡。 410纳米质子供体分子有助于这种激发态反应。通过对在不同发射波长下测量并作为HFIP浓度的函数的多指数衰减进行分析，已对该光互变异构过程的激发态动力学进行了详细分析。

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