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Intramolecular Triplet Energy Transfer in Pyrene–Metal Polypyridine Dyads: A Strategy for Extending the Triplet Lifetime of the Metal Complex
Author(s) -
Hissler Muriel,
Harriman Anthony,
Khatyr Abderrahim,
Ziessel Raymond
Publication year - 1999
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(19991105)5:11<3366::aid-chem3366>3.0.co;2-i
Subject(s) - intramolecular force , pyrene , energy transfer , metal , photochemistry , chemistry , triplet state , chemical physics , stereochemistry , organic chemistry , molecule
An elegant and flexible synthesis of pyrene‐based dyads bearing ruthenium or osmium chromophoric moieties connected through a single C≡C bond or a Pt(C≡C) 2 spacer is described (see picture). Photophysical properties reveal that the two Ru‐based units enter into reversible triplet energy transfer with the appended pyrene. This effect is responsible for the unusual prolongation of the ruthenium triplet excited (40 and 17 μs, for pyr–Ru and pyr–Pt–Ru , respectively).