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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Quenching of the Photoisomerization of Azohenzene Self-Assembled Monolayers by the Metal Substrate
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Quenching of the Photoisomerization of Azohenzene Self-Assembled Monolayers by the Metal Substrate

机译：金属基底对偶氮苯自组装单分子层光致异构化的猝灭

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摘要

In this study, we aim at investigating the role played by the metal surface as a possible dissipative channel in the photoisomerization process of azobenzene-derivative- based self-assembled monolayers (azo-SAMs). In particular we compare the cases of gold and platinum. We study the excitonic transfer phenomena of two azo-derivatives (both in trans and in cis conformation) chemisorbed on Au{111} and Pt{111} to the metal surfaces. The metal effects are evaluated within the local and nonlocal regimes, showing that nonlocabty in the metal response plays an important role and nonlocal accounting quenching rates are one order of magnitude smaller than the corresponding local results. The couplings are stronger for Au{111} than for Pt{111}, but for both cases the energy transfer between the molecule and the metal turns out not to be able to suppress photoisomerization.
机译：在这项研究中，我们旨在研究金属表面作为基于偶氮苯衍生物的自组装单分子层（azo-SAMs）的光致异构化过程中可能的耗散通道的作用。特别是，我们比较了黄金和铂金的情况。我们研究了化学吸附在Au {111}和Pt {111}上的两种偶氮衍生物（反式和顺式）的激子转移现象。在局部和非局部范围内评估了金属效应，表明金属响应中的非稳定性起着重要作用，并且非局部核算的淬灭速率比相应的局部结果小一个数量级。 Au {111}的耦合比Pt {111}的耦合强，但是在两种情况下，分子与金属之间的能量转移都证明不能抑制光致异构化。

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