EFFICIENT PHOTOREDUCTION OF METHYLVIOLOGEN BY METALLOPHTHALOCYANINE SENSITIZERS |
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| Authors: | Hiroyuki Ohtani Takayoshi Kobayashi Takashi Tanno † Akira Yamada Dieter Wöhrle † Takeshi Ohno |
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| Institution: | Department of Physics, The University of Tokyo, Hongo, Bunkyo, Tokyo 113, Japan;Institute of Physical and Chemical Research, Hirosawa, Wako, Saitama 351, Japan;Department of Chemistry, College of General Education, Osaka University, Toyonaka, Osaka, 560, Japan |
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| Abstract: | Abstract— Metallophthalocyanines (MPc) and tetrasubstituted magnesium phthalocyanines (MgPcR4) were investigated as sensitizers for the photoreduction of methylviologen (MV2+) under visible light(420–800 nm) irradiation using disodium ethylenediaminetetraacetic acid (Na2EDTA) as an electron donor in dimethyl formamide (DMF)-water mixture. Magnesium phthalocyanine and aluminium phthalocyanine were found to be the most efficient sensitizers among nine MPc's examined (M = 2Li, 2Na, Mg, Ca, Al(Cl), Fe, Ni, Co, and Zn). The following sequence of the efficiency among MgPc and MgPcR4's was obtained. |
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