Synthesis and Characterization of a New Coordination Polymer Constructed from 2,2′-Dibenzyl-1,1′-Binaphthyl-3,3′-dicArboxylic Acid and Cobalt(II)

Abstract

A novel metal-organic framework Co(bnbc)(C₅H₅N)₃ (complex 1) (H₂bnbc = 2,2′-dibenzyl-1,1′-binaphthyl- 3,3′-dicarboxylic acid) has been synthesized under mild conditions and structurally characterized. IR spectra indicates that the coordination mode of carboxyl group of complex 1 is chelating bidentate with the Co²⁺ ion. Crystal structural analysis reveals that complex 1 adopts a one-dimensional (1D) infinite line structure, and the distance between two carbon atoms of the pair carboxyl groups is 8.226 Å which is longer than other analogs. The complex 1 is further assembled into a 2D supramolecular network through the hydrogen bonds. Thermogravimetric analysis (TGA) shows that complex 1 is highly thermally stable up to 150°C. X-ray powder diffraction (PXRD) of complex 1 shows that single crystalline structure is as the same as the huge mass small crystalline structure confirming its purity of phase. Meanwhile, the photoluminescent property of the complex 1 is investigated.

Keywords:

• 2,2′-Dibenzyl-1,1′-binaphthyl-3,3′-dicarboxylic acid
• Cobalt (II)
• crystal structure
• metal organic frameworks
• photoluminescent
• thermogravimetric analysis

Acknowledgments

This work was supported by the Natural Science Foundation of Hebei Province (No. B2012201109, No. B2010000223) and Doctoral fundation of Hebei University (No. 2009-164). Crystallographic data for the structural analysis have been deposited with the Cambridge Crystallographic Data Center, CCDC No. 901307. Copies of this information can be obtained free of charge from The Director, CCDC, 12 Union road, Cambridge, CB21EZ, UK (fax: + 44 1223 336033; email: [email protected] www:http://www.ccdc.cam.ac.uk).