Alkyl group-directed assembly of coordination polymers based on bis-(4-imidazol-1-yl-phenyl)-amine and their photocatalytic properties?

New Journal of Chemistry Pub Date: 2016-01-12 DOI: 10.1039/C5NJ02760H

Abstract

Hydrothermal reactions of Zn(NO3)2·6H2O or CdCl2·2.5H2O with bis-(4-imidazol-1-yl-phenyl)-amine (bimpa) and 5-methyl-1,3-benzenedicarboxylic acid (5-Me-1,3-H2BDC) or 5-tert-butyl-1,3-benzenedicarboxylic acid (5-tb-1,3-H2BDC) afforded four coordination polymers, [Zn2(5-Me-1,3-BDC)2(bimpa)2]n (1), {[Cd2(5-Me-1,3-BDC)2(bimpa)(H2O)4]·H2O}n (2), {[Zn(5-tb-1,3-BDC)(bimpa)]·2H2O}n (3) and {[Cd(5-tb-1,3-BDC)(bimpa)]·H2O}n (4). Complexes 1–4 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 exhibits a 4-fold interpenetrating 3D framework in which 1D curvilinear chains are interconnected by bimpa ligands. 2 can be considered as a 3D supramolecular architecture based on 2D entanglements which consist of 1D tubes in parallel interpenetration. 3 and 4, respectively, have 2D (65·8) layers (3) and 2D layers constructed by 1D tubes (4), which are further extended into two 3D supramolecular architectures through weak hydrogen-bonding and π?π interactions. The solid state luminescence and optical properties of 1–4 at ambient temperature were also investigated. A comparative study on their photocatalytic activity toward the degradation of methylene blue in polluted water was explored.

Graphical abstract: Alkyl group-directed assembly of coordination polymers based on bis-(4-imidazol-1-yl-phenyl)-amine and their photocatalytic properties
Recommended Literature