Zeitschrift für Anorganische und Allgemeine Chemie
Zeitschrift für Anorganische und Allgemeine Chemie
5 years ago

Synthesis, Characterization, and Luminescent Properties of Silver(I) Complexes based on Diphosphine Ligands and 6,7-Dicyanodipyridoquinoxaline

Synthesis, Characterization, and Luminescent Properties of Silver(I) Complexes based on Diphosphine Ligands and 6,7-Dicyanodipyridoquinoxaline
Yu Wang, Zhen-Wei Zhang, Zhong-Feng Li, Xiu-Lan Xin, Qiong-Hua Jin, Min Liu, Yang-Zhe Cui, Yu-Ping Yang
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 = bis[2-(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.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/zaac.201700241

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