2-苯基异喹啉及其衍生物铂(Ⅱ)配合物的合成和光谱性质

摘要

Seven platinum ( Ⅱ ) complexes containing 2-phenylisoquinoline or its derivatives were prepared and the structures and properties of complexes were characterized by 1H/13 C NMR, TGA, X-ray single crystal diffraction, CV, UV-Vis and PL etc. The results show that these platinum ( Ⅱ ) complexes keep planar coordination geometry around Pt atom, and exhibit red phosphorescence from the metal-to-ligand charge-transfer(MLCT) (407, 444, 463 nm) and ligand center(LC) (353, 363, 376 nm) of mixed-state with quantum efficiency of 0. 02 ~0. 06 and lifetimes of 1. 78 ~3. 33 μs at room temperature in the DCM solution. Steric hindrance of the peripheral substituent effectively inhibits the intermolecular interaction.%合成了7种2-苯基异喹啉及其衍生物Pt(Ⅱ)配合物.采用1H/13C NMR、TCA、X射线单晶衍射、CV、UV-Vis和PL等测试方法对配合物的结构和性能进行了表征.结果表明,这些Pt(Ⅱ)配合物均为平面四方配位构型.室温下,所有配合物在二氯甲烷(DCM)溶液中均发射红光,其中配合物(CzPPiQ) Pt( acac)和(CzPPiQ) Pt(dpm)为标准的红光发射,其发射源于金属到配体的电荷转移(MLCT)(407、444和463 nm)和配体中心(LC)(353、363和376 nm)的混合激发态.配合物在DCM溶液中的光量子产率为0.02～0.06,寿命为1.78～3.33μs.大位阻外围取代基的引入有效抑制了分子间相互作用.