Dimeric and polymeric silver(I) saccharinato complexes of two bis(pyridine) ligands: Synthesis,structural, spectroscopic,fluorescent and thermal properties |
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Authors: | Emel Guney Veysel T Yilmaz Orhan Buyukgungor |
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Institution: | 1. Department of Chemistry, Faculty of Arts and Sciences, Uludag University, 16059 Bursa, Turkey;2. Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Samsun, Turkey |
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Abstract: | The reaction of silver(I) with 1,2-bis1-(pyridin-2-yl)ethylidene]hydrazine (bpeh) and N,N-bis(pyridin-2-ylmethyl)amine (bpma) in the presence of Na(sac) (sac = saccharinate) yielded Ag2(sac)2(bpeh)] (1) and Ag(sac)(bpma)]n (2) with conformational chirality. Both complexes have been characterized by elemental analysis, IR, thermal analysis and X-ray single crystal diffraction. Complex 1 displays a binuclear composition, in which each silver(I) ion is bound to one monodentate sac ligand and one of the bidentate pyridylimino groups of the bpeh ligand in a distorted trigonal coordination geometry. Complex 2 is a one-dimensional helical polymer, in which silver(I) centers are bridged by tridentate bpma ligands, and each silver(I) ion is coordinated in a distorted tetrahedral geometry by one monodentate sac ligand, a bidentate pyridylamine group of one bpma ligand, and a py group of another bpma ligand. Weak intermolecular C–H?O hydrogen bonds and C–H?π interactions lead to assembly of 1 and 2 into three-dimensional supramolecular frameworks. Spectral and thermal analysis data for 1 and 2 are in agreement with the crystal structures. In addition, both complexes in the solid state display intraligand π–π∗ fluorescence. |
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Keywords: | Saccharinate 1 2-Bis[1-(pyridin-2-yl)ethylidene]hydrazine N N-bis(pyridin-2-ylmethyl)amine Chirality Coordination polymer Silver(I) |
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