Two- and three-photon absorption and excitation phosphorescence of oligofluorene-substituted Ir(ppy)3

A series of triscyclometalated iridium complexes with oligofluorene-substituted ppy ligands manifest impressive two- and three-photon absorption properties. In particular, a star-shaped complex bearing three carbazole-terminated trifluorenyl ppy demonstrates a large three-photon absorption cross sec...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2015-02, Vol.51 (16), p.3446-3449
Hauptverfasser: Fan, Yuanpeng, Ding, Duanchen, Zhao, Dahui
Format: Artikel
Sprache:eng
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Zusammenfassung:A series of triscyclometalated iridium complexes with oligofluorene-substituted ppy ligands manifest impressive two- and three-photon absorption properties. In particular, a star-shaped complex bearing three carbazole-terminated trifluorenyl ppy demonstrates a large three-photon absorption cross section up to 81 × 10(-78) cm(6) s(2) photon(-2). In combination with optimal phosphorescence quantum yields (0.5-0.8), such iridium complexes are effective two- and three-photon excited phosphorescence emitters.
ISSN:1359-7345
1364-548X
DOI:10.1039/c4cc09573a