Neutral Luminescent Bis(bipyridyl) Osmium(II) Complexes with Improved Phosphorescent Properties

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)6771-6777
Journal / PublicationOrganometallics
Volume33
Issue number23
Online published17 Nov 2014
Publication statusPublished - 8 Dec 2014

Abstract

A new class of neutral bis(isocyanoborato) bis(bipyridyl) Os(II) complexes with the general formula of [Os(N-N)2(CNBR3)2] (N-N = bpy, 4,4'-Me2bpy; R = C6F5, C6H5) were prepared with simple synthetic methodologies. One of these complexes was structurally characterized by X-ray crystallography. Unlike most of the neutral bis(bipyridyl) Os(II) complexes, which are very weakly emissive or nonemissive, these isocyanoborato complexes displayed intense orange to red phosphorescence with a luminescent quantum yield up to 0.09 in CH2Cl2 solution at room temperature. The photophysical and electrochemical properties of these complexes were also investigated. Detailed photophysical study showed that these complexes exhibited significantly enhanced emission properties over other reported neutral bis(bipyridyl) Os(II) complexes. In addition, it also revealed that the photophysics, electrochemistry, and excited state properties can be fine-tuned or modified through the functionalization of isocyanoborate ligands.

Citation Format(s)

Neutral Luminescent Bis(bipyridyl) Osmium(II) Complexes with Improved Phosphorescent Properties. / Chu, Wing-Kin; Yiu, Shek-Man; Ko, Chi-Chiu.
In: Organometallics, Vol. 33, No. 23, 08.12.2014, p. 6771-6777.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review