Photoinduced Electron Transfer between the Anionic Porphyrins and Viologens in Titania Nanosheets and Monodisperse Mesoporous Silica Hybrid Films

被引：37

作者：

Yui, Tatsuto ^{[1
]}

Kobayashi, Yuka ^{[1
]}

Yamada, Yuri ^{[2
]}

Yano, Kazuhisa ^{[2
]}

Fukushima, Yoshiaki ^{[2
]}

Torimoto, Tsukasa ^{[1
]}

Takagi, Katsuhiko ^{[1
,3
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Crystalline Mat Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Toyota Cent Res & Dev Labs Inc, Aichi 4801192, Japan

[3] Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki Ku, Kanagawa 2130012, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 04期

关键词：

mesoporous silica; titania nanosheet; electron transfer; charge separation; inorganic nanospace; CHARGE SEPARATION; SPECTROSCOPIC CHARACTERIZATION; PHOTOCHEMICAL REACTIVITY; FUNCTIONAL MATERIALS; LAYERED NIOBATES; COLLOIDAL SYSTEM; RADICAL CATIONS; CLAY-MINERALS; THIN-FILMS; INTERCALATION;

D O I：

10.1021/am101281n

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Photoinduced electron transfer between an anionic porphyrin derivative (tetrakis(p-carboxyphenyl)porphyrin; H2TCPP4-) and an electron accepting methyl viologen (MV2+) was investigated in two different nanoscale configurations, i.e., layered titania nanosheet (TNS) photocatalysts and ammonium-functionalized monodisperse mesoporous silica (AMMSS) particles. Cationic MV2+ intercalated within the TNS interlayers while anionic H2TCPP4- was accommodated within AMMSS nanocavities to form (MV2+-TNS)/(H2TCPP4--AMMSS) hybrid films. Upon irradiation with UV light and excitation of the TNS in the (MV2+-TNS)/(H2TCPP4--AMMSS) hybrid films, the consumption of H2TCPP4- and the formation of a one-electron reduced MV2+ (MV+center dot) were simultaneously observed. No consumption of H2TCPP4- was observed when an electrically insulating poly(styrene) (PS) was also introduced at the interface. These results suggest that photoinduced electron transfer occurred at the interface between the TNS and the AMMSS.

引用

页码：931 / 935

页数：5

共 82 条

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