A Novel 3-D Cobalt-Organic Framework Constructed by 2-Ethyl-1H-imidazole-4,5-dicarboxylic Acid and 4,4′-Bipyridine

Abstract

A novel coordination polymer, namely {[Co₃(HEIDC)₂(4,4′-bipy)₃]·2NO₃·6H₂O} _n (1), has been hydrothermally successfully synthesized by the reaction of 2-ethyl-1H-imidazole-4,5-dicarboxylic acid (H₃EIDC) with Co(NO₃)₂·6H₂O in the presence of 4,4′-bipyridine (4,4′-bipy). The single-crystal structural study reveals that 1 is a 3D metal-organic framework, which can be viewed as made up of [Co₃(HEIDC)₂(4,4′-bipy)₃] _n units, nitrate anions and solvent water molecules. Its thermal properties have been determined as well.

Keywords:

• crystal structure
• metal-organic framework
• synthesis
• thermal property

SUPPLEMENTARY MATERIALS

Crystallographic data for the structure reported in this article in the form of CIF file has been deposited with the Cambridge Crystallographic Data Centre as supplementary publication No. 855155 for complex 1. Copy of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 IEZ, UK (Fax: [phone]; E-mail: [email protected]).

The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China (21071127 and J1210060), and by the Natural Science Foundation of Henan Educational Committee (2009A150028 and 2011A150029).