Authentic-blue phosphorescent iridium(III) complexes bearing both hydride and benzyl diphenylphosphine; Control of the emission efficiency by ligand coordination geometry

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuan-Chien Chiu
  • Chen-Huey Lin
  • Jui-Yi Hung
  • Yi-Ming Cheng
  • Kang-Wei Wang
  • Min-Wen Chung
  • Gene-Hsiang Lee
  • Pi-Tai Chou

Detail(s)

Original languageEnglish
Pages (from-to)8164-8172
Journal / PublicationInorganic Chemistry
Volume48
Issue number17
Online published11 Aug 2009
Publication statusPublished - 7 Sep 2009
Externally publishedYes

Abstract

Sequential treatment of IrCl3·nH2O with 2 equiv of benzyl diphenylphosphine (bdpH) and then 1 equiv of 3-trifluoromethyl-5-(2-pyridyl) pyrazole (fppzH) in 2-methoxyethanol gave formation to three isomeric complexes with formula [Ir(bdp)(fppz)(bdpH)H] (13). Their molecular structures were established by single crystal X-ray diffraction studies, showing existence of one monodentate phosphine bdpH, one terminal hydride, a cyclometalated bdp chelate, and a fppz chelate. Variation of the metal−ligand bond distances showed good agreement with those predicted by the trans effect. Raman spectroscopic analyses and the corresponding photophysical data are also recorded and compared. Among all isomers complex 1 showed the worst emission efficiency, while complexes 2 and 3 exhibited the greatest luminescent efficiency in solid state and in degassed CH2Cl2 solution at room temperature, respectively. This structural relationship could be due to the simultaneously weakened hydride and the monodentate bdpH bonding that are destabilized by the trans-pyrazolate anion and cyclometalated benzyl group, respectively.

Citation Format(s)

Authentic-blue phosphorescent iridium(III) complexes bearing both hydride and benzyl diphenylphosphine; Control of the emission efficiency by ligand coordination geometry. / Chiu, Yuan-Chien; Lin, Chen-Huey; Hung, Jui-Yi; Chi, Yun; Cheng, Yi-Ming; Wang, Kang-Wei; Chung, Min-Wen; Lee, Gene-Hsiang; Chou, Pi-Tai.

In: Inorganic Chemistry, Vol. 48, No. 17, 07.09.2009, p. 8164-8172.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review