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设计、合成了3个新颖的环金属配体1-苯甲基-2-苯基-苯并咪唑[BPBM]、1-(4-甲氧基-苯甲基)-2-(4-甲氧基-苯基)-苯并咪唑[MBMPB]和1-(4-N,N-二甲基-苯甲基)-2-(4-N,N-二甲基-苯基)-苯并咪唑[DBPA],并以乙酰丙酮(Hacac)为辅助配体合成了3个高效绿色铱配合物Ir(BPBM)2(acac)(1)、Ir(MBMPB)2(acac)(2)和Ir(DPBA)2(acac)(3)。由于在配体上引入了大的非平面取代基,分子间的浓度猝灭被有效地抑制;室温下,3个配合物在纯固态下都展示了明亮的绿光发射,且详细研究了它们的热稳定性和光物理性能。结果表明:该类配合物具有短的激发态寿命和高的光致磷光效率,在制备非掺杂有机电致发光器件方面具有潜在的应用前景。
We have designed and synthesized three novel ring metal ligands, 1-benzyl-2-phenyl-benzimidazole [BPBM], 1- (4-methoxybenzyl) -2- Oxy-phenyl) -benzimidazoles [MBMPB] and 1- (4-N, N-dimethyl- benzyl) -2- (4-N, N- dimethyl-phenyl) -benzene (BPA) 2 (acac) (1), Ir (MBMPB) 2 (acac) (2) and imidacloprid [DBPA] were synthesized and supported by acetylacetone (Hacac) Ir (DPBA) 2 (acac) (3). Due to the introduction of large non-planar substituents on the ligand, quenching of the intermolecular concentration is effectively suppressed; at room temperature, the three complexes exhibit bright green emission at pure solid state, and they have been studied in detail Thermal stability and photophysical properties. The results show that the complexes have short excited state lifetime and high phosphorescent efficiency, and have potential applications in the preparation of non-doped organic electroluminescent devices.