Sensitization of TiO2 by the MLCT Excited State of Col Coordination Compounds

被引：15

作者：

Achey, Darren ^{[1
]}

Ardo, Shane ^{[1
]}

Xia, Hai-Long ^{[1
]}

Siegler, Maxime A. ^{[1
]}

Meyer, Gerald J. ^{[1
,2
]}

机构：

[1] Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA

[2] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 04期

关键词：

ELECTRON INJECTION; PHOTOELECTRODES; HYDROGEN; FILM;

D O I：

10.1021/jz101622k

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：

Co+ coordination compounda, based on porphyrin or glyoxime ligands, anchored to TiO2 nanocrystallites interconnected in a mesoporous thin film were found to efficiently inject electrons into TiO2 when excited with visible or near-infrared light. When a cobale metalloporphysin sensitizer was employed charge separated state whose recombination kinetics were nonexponential but were first order in the concentration of TiO2 electrons. The MLCT excited state was found to inject electrons more efficiently than the pi ->pi* excited state of the present findinds provide an earth abundant metal to use in coordination compounds for sensitization of wide-band-gap semiconductor nanoparticles especially those whose conduction band edges are generally closer to the vacuum level.

引用

页码：305 / 308

页数：4

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