A two-step electron-driven proton transfer mechanism for the solution-phase nonradiative decay process of squaraine molecule

被引：2

作者：

Ozawa, Hitoshi ^{[1
]}

Yashiro, Kazunori ^{[1
]}

Yabushita, Satoshi ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2015年 / 625卷

关键词：

PICOSECOND LASER PHOTOLYSIS; CONICAL INTERSECTIONS; FLUORESCENCE EMISSION; ENERGY; EXCITATION; CHEMISTRY; SOLVENT;

D O I：

10.1016/j.cplett.2015.02.025

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The strong solvent polarity dependence observed in the nonradiative decay rates of Bis[4-(dimethylamino)phenyl]squaraine (SQ-DMA) had previously been explained by the twisted intramolecular charge transfer mechanism. However, our recent theoretical study did not support this mechanism. We theoretically study the possibility of electron-driven proton transfer (EDPT) processes between an alcohol solvent molecule and the CO- groups of SQ-DMA using a complex model. The results actually support the EDPT mechanism that proceeds via two nonadiabatic transitions: the first from the locally excited (pi -> pi*) state of SQ-DMA to the charge transfer (CT) state, and the second from the CT to So states. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：78 / 83

页数：6

共 23 条

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