Blue phosphorescent Zn(II) and orange phosphorescent Pt(II) complexes of 4,4′-diphenyl-6,6′-dimethyl-2,2′-bipyrimidine
作者： Qin-De Liu , Ruiyao Wang , Suning Wang
DOI: 10.1039/B404905E
关键词:
摘要: To investigate the different phosphorescent promoting effects of organic emitters by various metal centers, a new ligand, 4,4'-diphenyl-6,6'-dimethyl-2,2'-bipyrimidine (pmbp), and its Zn(II), Hg(II), Pt(II) complexes, [Zn(pmbp)(2)](ClO(4))(2)(1), Pt(pmbp)Ph(2)(2), Zn(pmbp)Cl(2)(3), Hg(pmbp)Cl(2)(4) were synthesized. Their structures determined single crystal X-ray diffraction. The zinc complexes 1 3 exhibit blue luminescence in solid state at ambient temperature, but mercury complex 4 is not luminescent. At 77 K, both pmbp have emissions MeOH solutions, which demonstrated to be phosphorescence their long decay lifetime (micros). By comparing luminescent properties free ligand complex, we concluded that originates from centered pi --> pi* transitions. Complex 2 exhibits orange CH(2)Cl(2) solution K was assigned metal-to-ligand [d(M) pi*(pmbp)] charge transfer (MLCT). origin responsible for color Zn(II) complexes.
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