Alteration of molecular conformations and spectral properties for nickel(II), zinc(II) and copper(II) complexes having 3,8-di(thiophen-2′,2′′-yl)-1,10-phenanthroline ligands |
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| Authors: | Bin Hu |
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| Institution: | State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China |
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| Abstract: | Four transition metal complexes of 3,8-di(thiophen-2′,2″-yl)-1,10-phenanthroline (dtphen), formulated as Ni(dtphen)2(H2O)2]·(ClO4)2 (1), Zn(dtphen)2(H2O)]·(ClO4)2 (2) Cu(dtphen)2(H2O)]·(ClO4)2 (3), Cu(dtphen)(phen)2]·(ClO4)2 (4) (phen = 1,10-phenanthroline) with different metal-to-ligand ratios, were synthesized and characterized herein. The X-ray single-crystal diffraction studies of 1-4 exhibit that different molecular configurations for the dtphen ligand can be observed where the side thiophene rings adopt the trans/trans, trans/cis, trans/disorder and cis/cis conformations relative to the central 1,10-phenanthroline unit in different compounds. Fluorescence emission spectra of 1-4 in methanol show that the fluorescence emission of 2 is much stronger than the other three metal complexes, which is mainly due to its full d10 electronic configuration of Zn(II) ion. |
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| Keywords: | 3 8-Di(thiophen-2&prime 2&prime &prime -yl)-1 10-phenanthroline Coordination complexes Molecular configurations Supramolecular interactions |
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