Luminescence properties of Cu(Ⅰ)complexes with single-crystal-to-single-crystal conversion
2-(N,N-bis(diphenylphosphino)methyl)aminopyridine(bdppmapy)was selected as a phosphine ligand,dipyrido[3,2-a:2',3'-c]phenazine(dppz)as a nitrogen ligand,and[Cu(CH3CN)4]BF4 as a copper salt to react at room temperature.Three new Cu(Ⅰ)complexes were prepared,namely[Cu(dppz)(bdppmapy)]2(BF4)2·H2O(CuBF4-1),[Cu(dppz)(bdppmapy)]BF4(CuBF4-2),and[Cu(dppz)(bdppmapy)]BF4(CuBF4-3).Single crystals of CuBF4-1 and CuBF4-3 were obtained.The phenomenon of single-crystal-to-single-crystal conversion was found,and the influence of solvent molecules on the structure and photophysical properties of coordination geometry was explored.The struc-tures of complexes CuBF4-1 and CuBF4-3 were determined by single-crystal X-ray diffraction,and the structures of the three complexes were characterized by powder X-ray diffraction(PXRD),IR,and hydrogen/phosphorus NMR(1H/31P NMR).The photophysical properties of the complexes were characterized and analyzed by UV-Vis absorp-tion spectrum,fluorescence spectrum,fluorescence lifetime,and quantum yield.The differences in the lumines-cence properties of the complexes were compared,and the influence of solvent molecules on the structure and photo-physical properties of coordination geometry was discussed.Terahertz time-domain spectroscopy provided assis-tance in the study of complexes.CCDC:2309825,CuBF4-1;2309824,CuBF4-3.
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