文献类型：期刊文献

英文题名：Photophysical and nonlinear optical properties of μ-oxo-bridged indium and gallium phthalocyanines

作者：Liu, Ying[1]; O'Flaherty, Sean M.[2]; Chen, Yu[1]; Araki, Yasuyuki[3]; Bai, Jinrui[1]; Doyle, James[2]; Blau, Werner J.[2]; Ito, Osamu[3]

机构：[1]E China Univ Sci & Technol, Dept Chem, Adv Mat Lab, Shanghai 200237, Peoples R China;[2]Trinity Coll Dublin, Dept Phys, Mat Ireland Polymer Res Ctr, Dublin 2, Ireland;[3]Tohoku Univ, JST, CREST, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

年份：2007

卷号：75

期号：1

起止页码：88

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20071610550636);WOS:【SCI-EXPANDED(收录号:WOS:000246549500012)】；

语种：英文

外文关键词：phthalocyanines; optical properties; time-resolved optical spectroscopies; nonlinear optics

摘要：The photophysical and nonlinear optical properties of a mu-oxo-bridged phthalocyanine heterodimer, i.e., [tBu(4)PcGa-O-InPctBu(4)] (5), where gallium is located in one macrocycle and indium is on the other macrocycle and the two metal atoms are connected through oxygen, have been described. Its photophysical properties are compared with the dimers: [tBu(4)PcGa](2)O (3) and [tBu(4)PCIn](2)O (4). The very small shifts of Q- and B-bands for all mu-oxo Pc dimers 3-5 relative to the starting materials tBu(4)PcGaCl (1) and tBu(4)PcInCl (2) is indicative of a very weak interaction between two phthalocyanine rings in the ground state. The deactivation processes of the excited singlet state of 5 occur independently for tBu(4)PcGa-O-moiety and tBu(4)PCIn-O-moiety. Dimerization in the manner of 5 has no advantages over 3 and 4 from the point of view of optical limiting as it does not increase the ratio of the excited to ground state absorption cross-sections nor does it reduce the saturation energy density. (C) 2006 Elsevier Ltd. All rights reserved.