Captures of Copper(II)-2,2'-bpy Complexes in Conformation-Fixed Homometallic Anionic Dimers and Heterometallic Clusters
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- 作者：Mingyan Wu ; Daqiang Yuan ; Yougui Huang ; Wei Wei ; Qiang Gao ; Feilong Jiang ; Maochun Hong
- 刊名：Crystal Growth & Design
- 出版年：2007
- 出版时间：August 2007
- 年：2007
- 卷：7
- 期：8
- 页码：1446 - 1451
- 全文大小：421K
- 年卷期：v.7,no.8(August 2007)
- ISSN：1528-7505
文摘
Reactions of p-sulfonatothiacalix [4]arene (Na4H4TCAS), Cu(NO3)2·3H2O, and 2,2'-bipyridine (2,2'-bpy) with/withoutsilver(I) ions generated a self-complementary homometallic anionic dimer [Cu(2,2'-bpy)3][Cu3(HTCAS)(2,2'-bpy)4]2·14H2O·CH3OH (1) and a heterometallic cluster {Ag3Cu5[H3(TCAS)2](2,2'-bpy)8(H2O)}·31H2O (2). In these two complexes the cone-likeconformation of p-sulfonatothiacalix [4]arene is fixed by the metal centers through coordination with the phenolic groups and thioetherbridges at the lower rim of p-sulfonatothiacalix [4]arene. Interestingly, these two complexes display completely different structuralmotifs: head-to-head supramolecular dimers and tail-to-tail ditopic cups, while both 1 and 2 show several different types of captureof Cu-2,2'-bpy complexes. A variable-temperature magnetic susceptibility study of 1 indicates that there are weak ferromagneticinteractions between Cu(II) ions through the phenolic group bridge and very weak intermolecular antiferromagnetic interactions.