Electronic Communication in Luminescent Dicyanorhenate-Bridged Homotrinuclear Rhenium(I) Complexes

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

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Author(s)

  • Apple Wai-Yi Cheung
  • Sze-Wing Lai
  • Shun-Cheung Cheng
  • Shek-Man Yiu
  • Chi-Fai Leung

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)6696-6705
Number of pages10
Journal / PublicationInorganic Chemistry
Volume58
Issue number10
Online published7 May 2019
Publication statusPublished - 20 May 2019

Abstract

A series of cyano-bridged homotrinuclear Re(I) complexes with the general formula of {[Re]′[Re][Re]′}+ {[Re]′ = −[ReI(CO)2(LL)(X)]; [Re] = −[(NC)ReI(CO)2(phen)(CN)]–; LL = diimine, diphosphine, or two carbonyl ligands; X = triphenylphosphine or carbonyl ligand} and the corresponding mononuclear complex analogues were synthesized. The structures of most of the trinuclear Re(I) complexes have been determined by X-ray crystallography. The relative orientations of peripheral to central Re(I) units in these structures vary considerably. The photophysical properties of these trinuclear Re(I) complexes have been examined. Except for the trinuclear Re(I) complex with Br2phen ligand, all the other triads display orange to red photoluminescence derived from the 3MLCT [dπ(Re) → π*(phen)] origin of the central Re(I) unit, suggestive of efficient energy transfer between the peripheral chromophores and the central unit. In addition to the efficient energy transfer processes between the Re(I) chromophores in these trinuclear complexes, the ability of the [NC–Re–CN] bridging ligands for electronic coupling between the rhenium metal centers is evidenced by ca. 0.2–0.3 V separation of the two rhenium metal-based oxidation potentials of the chemically equivalent peripheral units.

Citation Format(s)

Electronic Communication in Luminescent Dicyanorhenate-Bridged Homotrinuclear Rhenium(I) Complexes. / Xiao, Yelan; Cheung, Apple Wai-Yi; Lai, Sze-Wing; Cheng, Shun-Cheung; Yiu, Shek-Man; Leung, Chi-Fai; Ko, Chi-Chiu .

In: Inorganic Chemistry, Vol. 58, No. 10, 20.05.2019, p. 6696-6705.

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