Photophysical and electrochemical studies of cyclometalated cationic heteroleptic iridium(III) complex salts have been carried out. For these complex salts the intense absorption bands appeared around 263 nm and are assigned to spin-allowed π-π* transitions of phenanthroline ligands. Moderately intense and weak absorption bands observed around 341 and 440 nm, respectively. These bands are assigned to spin-allowed metal to ligand charge transfer 1MLCT and 3MLCT transitions, respectively. The influence of anions and proton on the photophysical and electrochemical studies were also carried out. The emission wavelength was red shifted and emission color changed from yellow to red by the addition of CF3CO2H. The solution color changed from green to brown and the emission was quenched by the addition anions such as of F−, CH3COO− and H2PO4 −.
对环甲基化阳离子杂环
铱(III)复盐进行了光物理和电
化学研究。这些复盐在 263 nm 附近出现了强烈的吸收带,这些吸收带属于
菲罗啉
配体的自旋允许的 π-π* 转变。在 341 和 440 nm 附近分别观察到中等强度和较弱的吸收带。这些吸收带分别是自旋允许的
金属到
配体电荷转移 1MLCT 和 3MLCT 过渡。此外,还研究了阴离子和质子对光物理和电
化学研究的影响。加入 CF3CO2H 后,发射波长发生红移,发射颜色由黄色变为红色。加入 F-、CH3COO- 和 H2PO4 - 等阴离子后,溶液颜色由绿色变为棕色,发射被淬灭。