Cyclometallated tridentate platinum(ii) arylacetylide complexes: Old wine in new bottles

Ashanul Haque, Linli Xu, Rayya A. Al-Balushi, Mohammed K. Al-Suti, Rashid Ilmi, Zeling Guo, Muhammad S. Khan, Wai Yeung Wong, Paul R. Raithby

Research output: Contribution to journalReview article

14 Citations (Scopus)

Abstract

Square planar platinum(ii) complexes have been known for 150 years and pincer complexes, supported by a tridentate chelating ligand such as terpyridyl, have been known for more than 70 years. The development of cyclometallated platinum(ii) pincer complexes, in which the tridentate ligand forms one or more platinum-carbon bonds, has been much more recent. Particularly, in terms of their solution and solid-state luminescence these cyclometallated complexes show substantial advantages over their terpyridyl analogues. This tutorial review introduces the reader to the area of platinum(ii) cyclometallated pincer chemistry and shows the advantage of having an alkynyl group in the fourth coordination site on the metal. The basic design principles for the preparation of highly luminescent platinum(ii) cyclometallated pincer complexes are outlined and the strategy to improve the luminescence further by chemical manipulation of the pincer ligand and of the auxiliary ligand in the fourth coordination site are illustrated with recent examples from the literature. Recent applications of these cyclometallated pincer complexes in the area of opto-electronics is described, with emphasis on their use in OLEDs, OFETs and as NLO materials as well as demonstrating their potential use as triplet photosensitizers and as metal ion sensors. The aim of this review is to show the recent advances in this rapidly developing research field and to highlight the future promise of these materials.

Original languageEnglish
Pages (from-to)5547-5563
Number of pages17
JournalChemical Society Reviews
Volume48
Issue number23
DOIs
Publication statusPublished - 7 Dec 2019

ASJC Scopus subject areas

  • Chemistry(all)

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