Publication Date:
2014-08-19
Description:
Two transition metal-organic coordination polymers, [Mn 2 (1,3-bdc) 2 (Me 2 bpy) 2 ] · Me 2 bpy ( 1 ) and [Co(4,4′-oba)(Me 2 bpy)] ( 2 ) were hydrothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy, TG, and single-crystal X-ray diffraction [1,3-H 2 bdc = benzene-1,3-dicarboxylic acid, H 2 oba = 4,4′-oxybis(benzoic acid) Me 2 bpy = 4,4′-dimethyl-2,2′-bipyridine]. Compound 1 crystallizes in the orthorhombic system, space group P 2 1 2 1 2 1 , with a = 23.371(5), b = 14.419(3), and c = 14.251(3) Å. Compound 2 crystallizes in the monoclinic system, space group P 2 1 / c , with a = 7.4863(15), b = 18.272(4), c = 16.953(5) Å, and β = 107.44(3)°. The crystal structure of complex 1 is a wave-like layer with central Mn 2+ atoms bridged by 1,3-bdc ligands, whereas the structure of compound 2 presents a ladder chain of hexacoordinate Co 2+ atoms, in which the metal atoms are bridged by 4,4′-oba ligands and decorated by Me 2 bpy ligands. The two compounds are further extended into 3D supramolecular structures through π–π stacking interactions. Additionally, the compounds show intense fluorescence in solid state at room temperature.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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