Tunable Luminescent Properties of Tricyanoosmium Nitrido Complexes Bearing a Chelating O^N Ligand

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

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Author(s)

  • Li-Juan Luo
  • Qian-Qian Su
  • Shun-Cheung Cheng
  • Jing Xiang
  • Wai-Lun Man
  • Wen-Ming Shu
  • Ming-Hua Zeng
  • Shek-Man Yiu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)4406−4413
Journal / PublicationInorganic Chemistry
Volume59
Issue number7
Online published10 Mar 2020
Publication statusPublished - 6 Apr 2020

Abstract

We have recently reported a strongly luminescent osmium(VI) nitrido complex [OsVI(N)(NO2-L)(CN)3]- [HNO2-L = 2-(2-hydroxy-5-nitrophenyl)benzoxazole]. The excited state of this complex readily activates the strong C-H bonds of alkanes and arenes (Commun. Chem. 2019, 2, 40). In this work, we attempted to tune the excited-state properties of this complex by introducing various substituents on the bidentate L ligand. The series of nitrido complexes were characterized by IR, UV/vis, 1H NMR, and electrospray ionization mass spectrometry. The molecular structures of five of the nitrido compounds have been determined by X-ray crystallography. The photophysical and electrochemical properties of these complexes have been investigated. The luminescence of these nitrido complexes in the solid state, in a CH2Cl2 solution, and in a CH2Cl2 solid matrix at 77 K glassy medium clearly shows that these emissions are due to 3LML′CT [L ligand to Os≡N] phosphorescence. The presence of strongly electron-withdrawing substituents in these complexes enhances the LML′CT emission. Our result demonstrates that the excited-state properties of this novel class of luminescent osmium(VI) nitrido complexes can be fine-tuned by introducing various substituents on the bidentate L ligand.

Citation Format(s)

Tunable Luminescent Properties of Tricyanoosmium Nitrido Complexes Bearing a Chelating O^N Ligand. / Luo, Li-Juan; Su, Qian-Qian; Cheng, Shun-Cheung; Xiang, Jing; Man, Wai-Lun; Shu, Wen-Ming; Zeng, Ming-Hua; Yiu, Shek-Man; Ko, Chi-Chiu; Lau, Tai-Chu.

In: Inorganic Chemistry, Vol. 59, No. 7, 06.04.2020, p. 4406−4413.

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