Quenching of the Photoisomerization of Azobenzene Self-Assembled Monolayers by the Metal Substrate

被引:13
|
作者
Benassi, Enrico [1 ]
Corni, Stefano [1 ]
机构
[1] Ctr S3 CNR Ist Nanosci, I-41125 Modena, Italy
来源
JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 45期
关键词
EXCITATION-ENERGY TRANSFER; DIFFERENTIAL-OVERLAP TECHNIQUE; INTERMEDIATE NEGLECT; ELECTRONIC-STRUCTURE; AU(111) SURFACE; EXCITED-STATES; ADSORPTION; MOLECULE; GOLD; SPECTROSCOPY;
D O I
10.1021/jp508246p
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
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 nonlocality 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.
引用
收藏
页码:25906 / 25917
页数:12
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