Please use this identifier to cite or link to this item:
Title: Electronic communications mediated by metal clusters
Authors: Yip, JHK
Wu, J
Wong, KY 
Ho, KP
Pun, CSN
Vittal, JJ
Keywords: Electrochemistry
Electronic communication
Mixed valency
Molecular wire
Issue Date: 2004
Source: Journal of the Chinese Chemical Society, 2004, v. 51, no. 5 B, p. 1245-1252 How to cite?
Journal: Journal of the Chinese Chemical Society 
Abstract: Two model systems [CuI3(dppm) 3(μ3-η1-C≡CFc)2] ·PF6 (1·PF6) and [PtI 2(dppm)2(C≡CFc)2] (2) were devised to probe the ability of metal clusters in mediating electronic communications. The complexes were characterized by using single-crystal X-ray diffraction, UV-vis spectroscopy, and voltammetry (dppm = bis(diphenylphosphino)methane; Fc = ferrocenyl). The complex is composed a of trimetallic CuI3 core bridged by three dppm and capped with one and two ferrocenylacetylides, respectively. Cyclic and differential pulse voltammograms of 1·PF 6 show two reversible Fc oxidations separated by 110 ± 14 mV, giving a comproportionation constant Kc of 77 ± 30. The stability of the mixed-valence complex 12+ arises mainly from the reduction of electrostatic repulsion and statistical distribution. On the other hand, the Pt-Pt σ-bond enhances electronic interactions between the terminal Fc-groups in compound 2. The CV of the complex shows two reversible Fc-centered oxidations which are separated by 267 ± 14 mV and the K c is 3.3 × 104 ± 1.5 × 104. Addition of a d10 AuCl/Br fragment to the Pt-Pt bond gives rise to complexes [Pt2(μ-AuX)(dppm)2(C≡CFc)2] [X = Cl (3) and Br (4)]. The two Fc-oxidations are not resolved in the CV of the complexes, indicating that the electronic communication is shut down.
ISSN: 0009-4536
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Jul 3, 2018


Last Week
Last month
Citations as of Jul 10, 2018

Page view(s)

Last Week
Last month
Citations as of Jul 15, 2018

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.