Ir(III) complexes bearing benzothiazole and pyridine motifs on fluorene groups were synthesized and characterized. Complexes Ir1 and Ir2 exhibit 1π,π* transitions below 430 nm, with broad but weak metal-to-ligand and ligand-to-ligand charge transfer absorption bands above 430 nm. Both complexes possess long-lived emissions (τem = 0.37 μs for Ir1, τem = 5.41 μs for Ir2) and tripletexcited states (τTA
合成并表征了两种新的杂配阳离子 Ir( III ) 配合物,它们在芴基上带有苯并噻唑和吡啶基序。配合物Ir1和Ir2在 430 nm 以下表现出1 个π,π* 跃迁,在 430 nm 以上具有宽而弱的金属-配体和配体-配体电荷转移吸收带。两种配合物都具有长寿命发射(对于Ir1,τ em = 0.37 μs ,对于Ir2 , τ em = 5.41 μs)和三重激发态(对于Ir1,τ TA = 0.14 μs , τIr2的TA = 6.06 μs)。还研究了它们在溶液和聚集状态下的光学性质。两种 Ir( III ) 配合物在乙腈-水混合物中都表现出聚集诱导的磷光发射行为。随着含水量增加到 90%,配合物Ir1和Ir2的发射强度分别增加了近 3 倍和 2.8 倍。此外,在 CH 3 CN 和 CH 3 CN-H 2 O 混合物( f w = 90%)中进行了非线性透射率实验,532 nm 处