摘要
The silver-dppm complex, [Ag2(dppm)2(NMP)2](SbF6)2?4H2O?3CH2Cl2 1 (NMP = 2- (4-dimethylaminophenyl)imidazo(4,5-f)(1,10)phenanthroline, dppm = diphenylphosphinomethane), was synthesized and its structure was determined by X-ray diffraction. The crystal belongs to mono- clinic, space group C2/c, Mr = 2461.61, a = 21.57(10), b = 22.48(6), c = 22.53(6) ?, β = 101.29(2)o, V = 10713(64) ?3, Z = 4, Dc = 1.526 g/cm3, μ = 1.141 mm?1, F(000) = 4920, R = 0.0664 and wR = 0.1774 for 8524 observed reflections (I > 2σ(I)). Complex 1 exists as a centrosymmetric dimmer. The two dppm molecules bridge two AgNMP moieties to form an eight-membered Ag2P4C2 metal- lacyclic ring with ligand NMP chelating to each Ag. It appears photoluminescence (λmax = 625 nm) at room temperature and makes red shift compared with free ligand NMP (λmax = 522 nm). DFT calculation indicates that the emission of 1 originates from singlet metal-perturbed ILCT excited state.
The silver-dppm complex, [Ag2（dppm）2（NMP）2]（SbF6）2-4H2O-3CH2Cl2 1 （NMP = 2- （4-dimethylaminophenyl）imidazo（4,5-f）（1,10）phenanthroline, dppm = diphenylphosphinomethane）, was synthesized and its structure was determined by X-ray diffraction. The crystal belongs to monoclinic, space group C2/c, Mr = 2461.61, a = 21.57（10）, b = 22.48（6）, c = 22.53（6）A, β= 101.29（2）°, V= 10713（64）A^3, Z= 4, Dc= 1.526 g/cm^3,μ= 1.141mm^-1, F（000） = 4920, R =0.0664 and wR = 0.1774 for 8524 observed reflections （1 〉 2σ（I））. Complex 1 exists as a centrosymmetric dimmer. The two dppm molecules bridge two AgNMP moieties to form an eight-membered Ag2P4C2 metallacyclic ring with ligand NMP chelating to each Ag. It appears photoluminescence （λmax = 625 nm） at room temperature and makes red shift compared with free ligand NMP （λmax = 522 nm）. DFF calculation indicates that the emission of 1 originates from singlet metal-perturbed ILCT excited state.
基金
This work was support by National Basic Research Program of China (No: 2004CB720605) and the Natural Science Foundation of China (No. 20173064 and 90203017).
关键词
银
发光性能
合成方法
晶体结构
silver-dppm, luminescence, DFT, molecular obital, charge-transfer
