Self-Assembly, Reorganization, and Photophysical Properties of Silver(I)-Schiff-Base Molecular Rectangle and Polymeric Array Species
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- 作者：Huang-Chun Wu ; P. Thanasekaran ; Chi-Hwe Tsai ; Jing-Yun Wu ; Sheng-Ming Huang ; Yuh-Sheng Wen ; and Kuang-Lieh Lu
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：January 9, 2006
- 年：2006
- 卷：45
- 期：1
- 页码：295 - 303
- 全文大小：408K
- 年卷期：v.45,no.1(January 9, 2006)
- ISSN：1520-510X
文摘
A self-assembly of AgClO4 with a Schiff-base ligand N,N'-bis(pyridin-2-ylmethylene)benzene-1,4-diamine (1) gavea 1D zigzag polymeric array [{Ag2(C18H14N4)2}(ClO4)2(CH3CN)]n (3), while the self-assembly of AgClO4 with 3,3'-dimethyl-N,N'-bis(pyridin-2-ylmethylene)biphenyl-4,4'-diamine (2) afforded the molecular rectangle [{Ag2(C26H22N4)2}(ClO4)2] (4). The structures of 3 and 4 were characterized by single-crystal X-ray diffraction analysis. Structuraldata for 3 indicate that the Ag(I) ion is coordinated by two ligands of 1 in a distorted tetrahedral fashion therebyleading to a 1D zigzag polymeric array. The zigzag chains are interdigitated with weak 
pi.gif" BORDER=0 >-pi.gif" BORDER=0 > stacking interactions.The structure of 4 consists of a discrete molecular rectangle where the silver atom has a distorted square-planarcoordination with the pyridyl ligands and azomethine nitrogen atoms of 2. An intramolecular pi.gif" BORDER=0 >-pi.gif" BORDER=0 > interaction betweenthe phenyl rings of adjacent Schiff-base 2 functions to stabilize the rectangular architecture. The Ag(I)-Schiff-basecoordination polymer 3 is not stable in solution. The degradation and reorganization of 3 to form a [2 × 2] gridarchitecture [{Ag4(C26H22N4)4}(ClO4)4] (3g) was supported in a FAB-MS study. The rectangular structure of 4 remainsintact in solution at ambient temperature. The complexes 3g and 4 exhibit unusual luminescence behavior insolution at room temperature with significantly red-shifted emission in the visible region.
pi.gif" BORDER=0 >-pi.gif" BORDER=0 > stacking interactions.The structure of 4 consists of a discrete molecular rectangle where the silver atom has a distorted square-planarcoordination with the pyridyl ligands and azomethine nitrogen atoms of 2. An intramolecular pi.gif" BORDER=0 >-pi.gif" BORDER=0 > interaction betweenthe phenyl rings of adjacent Schiff-base 2 functions to stabilize the rectangular architecture. The Ag(I)-Schiff-basecoordination polymer 3 is not stable in solution. The degradation and reorganization of 3 to form a [2 × 2] gridarchitecture [{Ag4(C26H22N4)4}(ClO4)4] (3g) was supported in a FAB-MS study. The rectangular structure of 4 remainsintact in solution at ambient temperature. The complexes 3g and 4 exhibit unusual luminescence behavior insolution at room temperature with significantly red-shifted emission in the visible region.