Spacer-Directed Selective Assembly of Copper Square or Hexagon and Ring-Stacks or Coordination Nanotubes
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- 作者：Xialu Wu ; Nini Ding ; Wenhua Zhang ; Fei Xue ; T. S. Andy Hor
- 刊名：Inorganic Chemistry
- 出版年：2015
- 出版时间：July 20, 2015
- 年：2015
- 卷：54
- 期：14
- 页码：6680-6686
- 全文大小：442K
- ISSN：1520-510X
文摘
The use of simple self-assembly methods to direct or engineer porosity or channels of desirable functionality is a major challenge in the field of metal鈥搊rganic frameworks. We herein report a series of frameworks by modifying square ring structure of [{Cu2(5-dmpy)2(L1)2(H2O)(MeOH)}2{ClO4}4]路4MeOH (1路4MeOH, 5-dmpy = 5,5鈥?dimethyl-2,2鈥?bipyridine, HL1 = 4-pyridinecarboxylic acid). Use of pyridyl carboxylates as directional spacers in bipyridyl chelated Cu(II) system led to the growth of square unit into other configurations, namely, square ring, square chain, and square tunnel. Another remarkable characteristic is that the novel use of two isomers of pyridinyl鈥揳crylic acid directs selectively to two different extreme tubular forms鈥攁ligned stacking of discrete hexagonal rings and crack-free one-dimensional continuum polymers. This provides a unique example of two extreme forms of copper nanotubes from two isomeric spacers. All of the reactions are performed in a one-pot self-assembly process at room temperature, while the topological selectivity is exclusively determined by the skeletal characteristics of the spacers.