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Iridium(iii) phosphorescent complexes with dual stereogenic centers: single crystal, electronic circular dichroism
Tian-Yi Li1, You-Xuan Zheng2, Yong-Hui Zhou3
1State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China. yxzheng@nju.edu.cn and Dresden Integrated Center for Applied Physics and Photonic Materials, Technische Universität Dresden, George-Bähr-Str.1, 01069 Dresden, Germany.
Abstract:
Iridium complexes with a chiral metal center and chiral carbons, Λ/Δ-(dfppy)2Ir(chty-R) and Λ/Δ-(dfppy)2Ir(chty-S), were synthesized and characterized. These isomers have the same steady-state photophysical properties, and obvious offsets in ECD spectra highlight both the chiral sources. Each enantiomeric couple shows mirror-image CPL bands with a dissymmetry factor in the order of 10-3.
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