Synthesis and phosphorescent properties of two novel iridium(III) complexes bearing bulky tert-butyl substituents
Synthesis and phosphorescent properties of two novel iridium(III) complexes bearing bulky tert-butyl substituents
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DOI：
10.1016/j.cclet.2007.06.008
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发表时间：
2007-09
影响因子：
9.1
通讯作者：
Rong-Yi Huang;Xiaoqiang Wei;Tai Zhang;Zhiyun Lu;M. Xie
中科院分区：
文献类型：
--
作者：
Rong-Yi Huang;Xiaoqiang Wei;Tai Zhang;Zhiyun Lu;M. Xie
The synthesis and phosphorescence properties of two novel Ir(III) complexes bearing tert-butyl substituents, bis(4-tert-butyl-2-phenylbenzothiozolato-N, [Formula: see text] ) iridium(III) (acetylacetonate) [(tbt)2Ir(acac)] and bis(4-tert-butyl-1-phenyl-1H-benzimidazolato-N, [Formula: see text] ) iridium(III) (acetylacetonate) [(tpbi)2Ir(acac)], are reported, their molecular structures are confirmed by1H NMR, ESI-MS and elementary analysis. Photoluminescence (PL) studies revealed that they can emit strong green and orange phosphorescence in high quantum yields. Compared to their prototypes lacking of tert-butyl substituents, the two novel iridium(III) complexes both have shorter lifetimes and improved or nearly similar PL quantum efficiencies, implying that the exciton quenching is inhibited effectively when molecular steric hindrance increases. The two chelates have great potential to be used as electrophosphorescent materials.
