Single-molecule interfacial electron transfer dynamics of porphyrin on TiO2 nanoparticles: dissecting the interfacial electric field and electron accepting state density dependent dynamics

被引：22
|
作者：
Rao, Vishal Govind [1 ]
Dhital, Bharat
Lu, H. Peter
机构：
[1] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA
来源：
CHEMICAL COMMUNICATIONS | 2015年 / 51卷 / 94期
关键词：
SENSITIZED SOLAR-CELLS; CHARGE RECOMBINATION KINETICS; SNO2; NANOCRYSTALLITES; SPECTROELECTROCHEMISTRY; EFFICIENCY; INJECTION; PHOTOSENSITIZATION; SPECTROSCOPY; COMPLEX; FILMS;
D O I：
10.1039/c5cc06451a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Single-molecule photon-stamping spectroscopy correlated with electrochemical techniques was used to dissect complex interfacial electron transfer (ET) dynamics by probing an m-ZnTCPP molecule anchored to a TiO2 NP surface while electrochemically controlling the energetically-accessible surface states of TiO2 NPs. Application of negative potential increases the electron density in TiO2 NPs, resulting in hindered forward ET and enhanced backward ET due to the changes in the interfacial electric field and the occupancy of acceptor states.
引用
收藏
页码：16821 / 16824
页数：4
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