Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 20, 2019
Previous Article Next Article

Half-lantern cyclometalated Pt(II) and Pt(III) complexes with bridging heterocyclic thiolate ligands: synthesis, structural characterization, and electrochemical and photophysical properties

Author affiliations

Abstract

The half-lantern Pt(II)–Pt(II) cyclometalated complexes [{Pt(ppy-κ2C,N)(μ-N^S)}2] [Hppy = 2-phenylpyridine; HN^S = 2-mercaptopyridine (Spy, 1a), 5-(trifluoromethyl)-2-mercaptopyridine (SpyCF3, 1b), 2-mercaptopyrimidine (SpyN, 1c), 2-mercaptobenzothiazole (SBt, 1d) and 2-mercaptobenzimidazole (SBi, 1e)] were synthesized by reaction of [Pt(ppy-κ2C,N)Cl(dmso)] (A) with an ethanolic solution of the corresponding sodium thiolate salts, thus providing a new direct approach to obtain this type of complexes in high yield. 1a, 1d and 1e were previously reported by other routes (see the text). These complexes exhibit intense red emission (QY 13.2–37.4%, CH2Cl2) derived from a triplet metal–metal to ligand charge transfer (3MMLCT) excited state both in CH2Cl2 solution and in the solid state (298 and 77 K), consistent with strong Pt⋯Pt interactions. The electrochemical behavior of these complexes was examined to get insight into the influence of the bridging ligand on the metallointeractions. By stirring compounds 1a–c in CHCl3, two electron oxidized diplatinum(III) derivatives [{Pt(ppy-κ2C,N)(μ-N^S)Cl}2] (2a–c) were successfully obtained (2a previously reported by Kato et al.). The X-ray structure of 2c·CHCl3 confirmed the retention of the half-lantern structure for the Pt(III)–Pt(III) dichloro complex and a shortening of the Pt–Pt distance in relation to 1.

Graphical abstract: Half-lantern cyclometalated Pt(ii) and Pt(iii) complexes with bridging heterocyclic thiolate ligands: synthesis, structural characterization, and electrochemical and photophysical properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Feb 2019, accepted on 23 Apr 2019 and first published on 23 Apr 2019


Article type: Paper
DOI: 10.1039/C9NJ00969H
New J. Chem., 2019,43, 7716-7724

  •   Request permissions

    Half-lantern cyclometalated Pt(II) and Pt(III) complexes with bridging heterocyclic thiolate ligands: synthesis, structural characterization, and electrochemical and photophysical properties

    H. R. Shahsavari, E. Lalinde, M. T. Moreno, M. Niazi, S. H. Kazemi, S. Abedanzadeh, M. Barazandeh and M. R. Halvagar, New J. Chem., 2019, 43, 7716
    DOI: 10.1039/C9NJ00969H

Search articles by author

Spotlight

Advertisements