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Journal of Coordination Chemistry Volume 66, 2013 - Issue 7
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Original Articles

Two supramolecular isomers with different structural features: reversible transformation and fluorescence properties

Guanglu Li Department of Chemistry, College of Science, Northeast University, Shenyang, P.R. China
,
Chunlei Wang The Library of Northeast Normal University, Changchun, China
&
Xia Zhang Department of Chemistry, College of Science, Northeast University, Shenyang, P.R. ChinaCorrespondence[email protected]
Pages 1107-1117 | Received 30 Mar 2012, Accepted 26 Oct 2012, Published online: 25 Mar 2013
 
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Abstract

Two supramolecular isomers, {[Cd2(pda)2(1,10′-phen)2]·H2O}n (1) and {[Cd2(pda)2(1,10′-phen)2]·4H2O}n (2) (1,10′-phen = 1,10-phenanthroline, pda = phenylenediacrylate dianion), have been synthesized and characterized by single-crystal X-ray analysis. Complex 1 exhibits a 3D network constructed from 1D rod-shaped secondary building units, while 2 shows a 3D, twofold interpenetrated framework. There exists a reversible transformation between the pair of isomers: when yellow block crystals of 1 are treated under microwave irradiation, colorless plate crystals of 2 are formed; in turn, if crystals of 2 are dissolved in water and left undisturbed about two weeks at room temperature, crystals of 1 reappear. Fluorescence properties of 1 and 2 have also been studied.

Acknowledgments

We gratefully acknowledge financial supports from National Natural Science Foundation of China (21103017).

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