Luminescence properties of Pt(II) complexes containing polypyridine ligands with extended aromatic moieties

Dalton Transactions : an International Journal of Inorganic Chemistry
Fabio CucinottaMatteo Cusumano

Abstract

The luminescence properties of eleven Pt(II) complexes containing polypyridine ligands with extended aromatic moieties have been studied, both in acetonitrile fluid solution at 298 K and in butyronitrile rigid matrix at 77 K. For comparison purposes, also the phosphorescence properties of three free ligands at 77 K in butyronitrile have been investigated. The absorption spectra of all the compounds exhibit intense bands (epsilon in the range 10(4)-10(5) M(-1) cm(-1)) in the UV region, which are attributed to spin-allowed ligand-centered (LC) transitions, and moderately intense bands (epsilon in the range 10(3)-10(4) M(-1) cm(-1)) in the visible region, which receive contribution from both spin-allowed LC transitions and spin-allowed metal-to-ligand charge-transfer (MLCT) transitions. At low energy, less intense spin-forbidden MLCT bands are also present. At 77 K in rigid matrix, all the studied compounds exhibit structured and long-lived (lifetimes from 840 micros on the millisecond timescale) luminescence, which is attributed to triplet LC states in all cases. At room temperature in fluid solution the luminescence lifetime of all the compounds is largely shortened (nanosecond timescale), and most of the emission spectra are un...Continue Reading

References

Aug 21, 2001·Inorganic Chemistry·J A TreadwayT J Meyer
Mar 28, 1996·Chemical Reviews·Vincenzo BalzaniScolastica Serroni
Feb 19, 2002·Chemical Reviews·Pingyun Chen, Thomas J. Meyer
Mar 30, 2004·Inorganic Chemistry·Matteo CusumanoPer Lincoln
Sep 15, 2005·Inorganic Chemistry·Bernadette HigginsJ N Demas
Sep 27, 2005·Inorganic Chemistry·James H Alstrum-AcevedoThomas J Meyer
Jan 5, 2006·Inorganic Chemistry·Matteo CusumanoAntonino Giannetto
Aug 1, 1975·Proceedings of the National Academy of Sciences of the United States of America·C Creutz, N Sutin
Jun 15, 2006·Journal of the American Chemical Society·Pingwu DuRichard Eisenberg
Apr 4, 2007·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Fausto PuntorieroMatteo Cusumano
Dec 11, 1970·Science·G A CrosbyD H Carstens

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Citations

Jun 16, 2012·Chemistry : a European Journal·Qianxiong ZhouXuesong Wang

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