Metallation of a cyclic chlorophyll hetero-dyad, and the optical properties of synthetic metallo-dyads

被引：0
|
作者：
Hitoshi Tamiaki
Nobuo Kosaka
Yusuke Kinoshita
机构：
[1] Faculty of Science and Engineering,Department of Bioscience and Biotechnology
[2] Ritsumeikan University,undefined
来源：
Research on Chemical Intermediates | 2013年 / 39卷
关键词：
Chlorophyll; Dimer; Intramolecular interaction; Metal complex; Regioisomer;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A cyclic chlorophyll hetero-dyad 1-H2H2, prepared by double ester linking of two structurally different pyropheophorbide-a moieties through 3-CH2OCO-132′ and 172-COOCH2-3′, was metallated with zinc and copper to give mono and di-metallated complexes 1-MH2 or 1-H2M and 1-MM. The metallation proceeded stepwise and regioselectively, with predominant synthesis of one of the two mono-metallated complexes 1-MH2 as intermediate. The di-zinc complex produced, 1-ZnZn, was demetallated exclusively via the same mono-zinc complex 1-ZnH2 as was the major intermediate during metallation. Visible and/or circular dichroism spectra of 1-H2H2, 1-MH2, 1-H2M, and 1-MM (M = Ni, Cu, or Zn) were measured in organic solvents. Intramolecular interaction of chlorin chromophores is discussed and compared with that of the corresponding monomeric species.
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页码：221 / 232
页数：11
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