Publication Date:
2015-10-24
Description:
Four Zn II /Cd II coordination polymers (CPs) based on 2-(4-carboxy-phenyl)imidazo[4, 5-f]-1, 10-phenanthroline (HNCP) and different derivatives of 5- R -1, 3-benzenedicarboxylate (5- R -1, 3-BDC) ( R = NO 2 , H, OH), [Zn(HNCP)(5-NO 2 -1, 3-BDC)] n ( 1 ), [Cd(HNCP)(5-NO 2 -1, 3-BDC)] n ( 2 ), [Zn(HNCP)(1, 3-BDC)(H 2 O) 2 ] n ( 3 ), and {[Zn(HNCP)(5-OH-1, 3-BDC)(H 2 O) · H 2 O} n ( 4 ) were synthesized under hydrothermal conditions. Compounds 1 – 4 were determined by elemental analyses, IR spectroscopy, and single-crystal and powder X-ray diffraction. Compounds 1 and 2 are isomorphous, presenting a 4-connected uninodal (4, 4)-sql 2D framework with threefold interpenetration, which are further extended into the three-dimensional (3D) supramolecular architecture through π ··· π stacking interactions between the aryl rings of 5-NO 2 -1, 3-BDC. Compared to compound 1 , 3 is obtained by using different reaction temperatures and metal-ligand ratios, generating a 3D framework with –ABAB– fashion via π ··· π stacking interactions. Compound 4 is a 1D chain, which is further extended into a 3D supramolecular net by hydrogen bonds and π ··· π stacking interactions. The thermogravimetric and fluorescence properties of 1 – 4 were also explored.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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