Bathochromic effect of trifluoromethyl-substituted 2-naphthalen-1-yl-pyridine ligands in color tuning of iridium complexes

Cheng Hsien Yang, Chun Hung Chen, I. Wen Sun

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

A series of trifluoromethyl-substituted 2-naphthalen-1-yl-pyridine ligands and the corresponding iridium complexes have been synthesized and characterized by spectroscopic methods as well as X-ray crystallography. Upon excitation at 470 nm, (4-fnapy)2Ir(acac) and (5-fnapy)2Ir(acac) emit red photoluminescence at 617 and 613 nm, respectively. Compared to (napy)2Ir(acac), the introduction of trifluoromethyl substituents resulted in a significant bathochromic shift caused by a lowering of the LUMO levels. We propose that the bathochromic effect of the nitrogen atom on the pyrimidine ring should be much weaker than expected from the work of Chi et al. [Inorg. Chem. 44 (2005) 1344]. For a blend with 6 wt% of (5-fnapy)2Ir(acac), a brightness of 8600 cd m-2 at 10.5 V is reached with Commission Internationale de L'Eclairage chromaticity coordinates of x = 0.65 and y = 0.35.

原文English
頁(從 - 到)2407-2414
頁數8
期刊Polyhedron
25
發行號12
DOIs
出版狀態Published - 2006 八月 21

All Science Journal Classification (ASJC) codes

  • 物理與理論化學
  • 無機化學
  • 材料化學

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