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Original Articles

Polymeric frameworks constructed from Zn with benzenetricarboxylic acid ligands and monodentate 4,4′-bipyridine: hydrothermal synthesis, crystal structures and luminescence

, , &
Pages 251-261 | Received 21 Oct 2006, Accepted 29 Dec 2006, Published online: 22 Sep 2010
 

Abstract

Two metal-organic coordination polymers, [Zn(1,2,4-BTC)(bipy)] n (1) (1,2,4-BTC = 1,2,4-benzenetricarboxylic acid, bipy = 4,4′-bipyridine) and [Zn(1,3,5-BTC)(bipy)(H2O) · 3H2O] n (2) (1,3,5-BTC = 1,3,5-benzenetricarboxylic acid, bipy = 4,4′-bipyridine), have been synthesized using the principle of crystal engineering. Despite similar reactants and reaction conditions, complex 1 is an infinite 2-D square-grid network while complex 2 is a 1-D zigzag chain. 4,4′-bipyridine is a terminal monodentate ligand towards the Zn centers, which is rare in Zn polymers because 4,4′-bipyridine is a linear molecule and bridges central ions using two nitrogen atoms. Both coordination polymers show blue luminescence in the solid state at room temperature.

Acknowledgement

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (20301013).

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