Synthesis,Characterization, and Luminescent Properties of Silver(I) Complexes based on Diphosphine Ligands and 6,7‐Dicyanodipyridoquinoxaline |
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| Authors: | Yu Wang Yang‐Zhe Cui Zhong‐Feng Li Min Liu Yu‐Ping Yang Zhen‐Wei Zhang Xiu‐Lan Xin Qiong‐Hua Jin |
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| Institution: | 1. Department of Chemistry, Capital Normal University, Beijing, P. R. China;2. The College of Materials Science and Engineering, Beijing University of Technology, Beijing, P. R. China;3. School of Science, Minzu University of China, Beijing, P. R. China;4. Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing, P. R. China;5. School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing, P. R. China;6. +86‐10‐68902320 |
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| Abstract: | Five mono‐nuclear silver (I) complexes with 6,7‐dicyanodipyridoquinoxaline ligand, namely {Ag(DPEphos)(dicnq)]NO3}2 · CH3OH ( 1 ), Ag(DPEphos)(dicnq)]BF4 · CH3OH ( 2 ), Ag(XANTphos)(dicnq)]CF3SO3 ( 3 ), {Ag(XANTphos)(dicnq)]NO3}2 ( 4 ), and Ag(XANTphos)(dicnq)]ClO4 · CH2Cl2 ( 5 ) {DPEphos = bis2‐(diphenylphosphanyl)phenyl]ether, dicnq = 6,7‐dicyanodipyridoquinoxaline, XANTphos = 9,9‐dimethyl‐4,5‐bis(diphenylphosphanyl)xanthene} were characterized by X‐ray diffraction, IR, 1H NMR, 31P NMR, fluorescence spectra, and terahertz time‐domain spectra (THz‐TDS). In the five complexes the AgI, which is coordinated by two kinds of chelating ligands, adopts four‐coordinate modes to generate mono‐nuclear structures. The C–H ··· π interactions lead to formation of a 1D infinite chain for complexes 2 and 3 . The crystal packing of complexes 1 and 5 reveal that they form 3D supermolecular network by several pairs of C–H ··· π interactions. The emissions of these complexes are attributed to ligands‐centered π–π*] transition based on both of the P‐donor and N‐donor ligands. |
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| Keywords: | 6 7‐Dicyanodipyridoquinoxaline Luminescence Silver Supermolecular interaction Terahertz time‐domain spectroscopy |
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