The binuclear cyclometalated complexes [Pt2Me2(ppy)2(μ-dppm)], 1a, and [Pt2Me2(bhq)2(μ-dppm)], 1b, in which ppy = 2-phenylpyridyl, bhq = benzoh}quinoline and dppm = bis(diphenylphosphino)methane, were synthesized by the reaction of [PtMe(SMe2)(ppy)] or [PtMe(SMe2)(bhq)] with 1/2 equiv of dppm at room temperature, respectively. Complexes 1a and 1b were fully characterized by multinuclear (1H, 31P, 13C, and 195Pt) NMR spectroscopy and were further identified by single crystal X-ray structure determination. A comparison of the intramolecular PtâPt and ÏâÏ interactions in complexes 1a and 1b has been made on the basis of data on crystal structures and wave functions analysis. The binuclear complexes 1a and 1b are luminescent in the solid state, and showing relatively intense orangeâred emissions stemming from 3MMLCT excited states. The reaction of complex 1b with excess MeI gave the binuclear cyclometalated Pt(IV)âPt(IV) complex [Pt2Me4(bhq)2(μ-I)2], 2. Crystal structure of complex 2 shows intermolecular CâHâ¯I and CâHâ¯Ï interactions in solid state.
双核环状
金属配合物[Pt2Me2(ppy)2(μ-dppm)]、1a和[Pt2Me2(bhq)2(μ-dppm)]、1b(其中ppy =
2-苯基吡啶,bhq = 苯并h}
喹啉,dppm = 双(
二苯基膦)
甲烷)分别通过[PtMe(SMe2)(ppy)]或[PtMe(SMe2)(bhq)]与1/2当量的dppm在室温下反应合成。配合物1a和1b通过多核(1H、31P、13C和195Pt)核磁共振光谱法进行了充分表征,并通过单晶X射线结构测定进一步鉴定。根据晶体结构和波函数分析数据,对配合物1a和1b中的分子内Pt-Pt和Ï-Ï相互作用进行了比较。双核配合物1a和1b在固态下发光,并显示出源自3MMLCT激发态的相对强烈的橙红色发射。配合物1b与过量的MeI反应得到双核环状
金属化Pt(IV)-Pt(IV)配合物[Pt2Me4(bhq)2(μ-I)2]、2。配合物2的晶体结构显示了固态下的分子间