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

Scheduled maintenance work on Wednesday 27th March 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 37, 2017
Previous Article Next Article

Anionic cyclometallated Pt(II) square-planar complexes: new sets of highly luminescent compounds

Author affiliations


Two series of novel NBu4+ salts of anionic cyclometallated Pt(II) complexes were synthesized and fully characterized. These highly luminescent compounds (NBu4[(C^N)Pt(O^N)] and NBu4[(C^N)Pt(O^O)]) are incorporated as testing examples of cyclometallating ligands 2-phenylpyridine (PhPy), 2-(2,4-difluorophenyl)-pyridine (F2PhPy) and 2-thienylpyridine (ThPy), and a benzo[h]quinoline (Bzq) fragment. All complexes display a square-planar coordination sphere, wherein the “(C^N)Pt” fragment is completed either by an O^N orotate (Ort) or an O^O tetrabromocatecholate (Cat) ligand. The HOMO and LUMO levels of all complexes were estimated by cyclic voltammetry and a comprehensive electrochemical and photophysical study was performed. The new complexes are emissive in solution at 298 K and the NBu4[(ThPy)Pt(Ort)] complex displays good photosensitizing properties (Φ = 28% in deaerated solution vs. Φ = 1.4% in the presence of O2). Both series of NBu4[(C^N)Pt(Ort)] and NBu4[(C^N)Pt(Cat)] complexes are highly luminescent in the solid state (emission quantum yields from 10 to 85%). Remarkably, the square-planar Pt(II) anionic complexes showed an important increase in luminescence quantum yields on changing from the dilute solution to the solid state (the most significant from 0.13% to 85% for the NBu4[(PhPy)Pt(Ort)] complex, an ideal candidate as an active species for LEECs).

Graphical abstract: Anionic cyclometallated Pt(ii) square-planar complexes: new sets of highly luminescent compounds

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Jun 2017, accepted on 25 Aug 2017 and first published on 25 Aug 2017

Article type: Paper
DOI: 10.1039/C7DT02267K
Citation: Dalton Trans., 2017,46, 12625-12635

  •   Request permissions

    Anionic cyclometallated Pt(II) square-planar complexes: new sets of highly luminescent compounds

    L. Ricciardi, M. La Deda, A. Ionescu, N. Godbert, I. Aiello and M. Ghedini, Dalton Trans., 2017, 46, 12625
    DOI: 10.1039/C7DT02267K

Search articles by author