新型铱(Ⅲ)配合物有机磷光材料的合成及性能研究

Synthesis and Properties of a Series of Novel Phosphorescent Iridium(Ⅲ) Complexes

以苯甲酰氯及其衍生物、邻氨基苯硫酚等为原料,通过与无水三氯化铱及乙酰丙酮配合,合成了一系列新型的取代2-苯基苯并噻唑合铱(Ⅲ)的乙酰丙酮类配合物有机磷光材料,并对产物进行了核磁、红外、质谱和元素分析等结构表征及溶解性能、热稳定性和紫外吸收光谱、荧光光谱等发光性能的研究.结果表明,此类配合物在二甲亚砜和三氯甲烷等有机溶剂中具有良好的溶解性;配合物分解温度高,可达338～360℃,具有较高的热稳定性,其高温升华现象十分有利于真空热蒸镀薄膜的制备;此类配合物在紫外-可见吸收光谱上的250～350 nm处出现了强的配体自旋,允许单重态π-π*跃迁吸收峰,在400～530 nm处出现了配合物分子内金属铱到配体的单重态和三重态电荷跃迁吸收峰(1MLCT和3MLCT);同时,该类铱(Ⅲ)配合物在发射光谱560～600 nm处出现了强的黄光发射,并且在室温下表现出较高的荧光量子效率.

A series of new phosphorescent 2- （phenyl） -benzothiazolate derivatives iridium （ Ⅲ ） acetylacetonate complexes are synthesized from benzoyl-chloride and substituted benzoyl-chloride, 2-aminothiopbenol and iridium trichloride anhydrate via three-step-reaction. All these complexes are characterized by ^1H NMR, FTIR, mass spectrometry and elemental analysis. The solubility, thermogravitometric analysis, UV-Vis absorption, photoluminescence and quantum efficiencies of these complexes are investigated. The results indicate that all these complexes have better solubility in common organic solvents such as dimethyl-sulfoxide and chloroform. The TGA thermograms show that the decomposition temperature of all these complexes are stable up to 338-360 ℃, all the complexes have excellent performance in thermostability, and they can be easily sublimed that makes them suitable for high-vacuum thermal evaporation films. The UV-Vis absorption spectra of these complexes show intense high energy transitions π-π from 250 to 350 nm, singlet metal to ligand charge-transfer（^1MLCT） from 400 to 450 nm and the triplet metal to ligand charge-transfer（^3MLCT） from 450 to 530 nm. A series of strong yellow photoluminescence （ in the range of 560 to 600 nm） and high quantum efficiencies of these complexes are also observed at room temperature.