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Controlling Electronic Communication in Ethynylated‐Polypyridine Metal Complexes
Author(s) -
Elghayoury Abdelkhrim,
Harriman Anthony,
Khatyr Abderrahim,
Ziessel Raymond
Publication year - 2000
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(20000103)39:1<185::aid-anie185>3.0.co;2-3
Subject(s) - chromophore , ruthenium , terpyridine , triplet state , chemistry , photochemistry , naphthalene , metal , energy transfer , molecule , chemical physics , biochemistry , organic chemistry , catalysis
By introduction of a naphthalene subunit in the middle of a butadiynylene spacer the triplet lifetime of the ruthenium chromophore in RR is prolongated to 475 ns. By increasing laser intensities the two Ru‐terpy terminals are simultaneously promoted to the triplet state, and triplet – triplet annihilation occurs. In contrast, in the mixed Ru/Os complex ( RO ) the long inherent triplet lifetime of the Os‐terpy fragment facilitates reverse triplet energy transfer. terpy=bis(2,2′:6′,2″‐terpyridine).