Synthesis and luminescent properties of cis bis-N-heterocyclic carbene platinum(II) bis-arylacetylide complexes

Yuzhen Zhang, Jai Anand Garg, Clement Michelin, Thomas Fox, Olivier Blacque*, Koushik Venkatesan

*Corresponding author for this work

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

A series of luminescent N-heterocyclic carbene platinum(II) complexes, [(pmim)Pt(C≡C-R)2] (R = C6H5 (2), C 6H4OMe (3), C6H2(OMe)3 (4), C6H4NMe2 (5), C4H3S (6), C6H4C≡CC6H5 (7), 1-pyrenyl (8), and C6H4F (9)), were successfully synthesized using the precursor (pmim)PtI2, 1 (pmim = 1,1′-dipentyl-3,3′-methylene-diimidazoline-2,2′-diylidene). The X-ray crystal structures of 1, 4, 5, and 7 have been determined. These complexes showed long-lived emission in solution at room temperature. The emission origin of the complexes is tentatively assigned to be from triplet states of predominantly intraligand (IL) character with some mixing of metal-to-ligand charge-transfer (MLCT) character. TD-DFT and DFT calculations have been performed on most of the complexes to ascertain the nature of the excited state. Changes in the alkynyl ligands lead to a change in the absorption and emission maxima seen for these complexes in a potentially predictable way.

Original languageEnglish
Pages (from-to)1220-1228
Number of pages9
JournalInorganic Chemistry
Volume50
Issue number4
DOIs
Publication statusPublished - 21 Feb 2011
Externally publishedYes

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