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Elucidating the Origin of Enhanced Phosphorescence Emission in the Solid State (EPESS) in Cyclometallated Iridium Complexes

TitleElucidating the Origin of Enhanced Phosphorescence Emission in the Solid State (EPESS) in Cyclometallated Iridium Complexes
Publication TypeJournal Article
Year of Publication2014
AuthorsHowarth, AJ, Patia, R, Davies, DL, Lelj, F, Wolf, MO, Singh, K
JournalEUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Pagination3657-3664
Date PublishedAUG
ISSN1434-1948
Abstract

A new mechanism for enhanced phosphorescence emission in the solid state (EPESS) in cyclometallated Ir complexes with the general formula {[}Ir((CN)-N-boolean AND)(2)((NO)-O-boolean AND)] involving distortion of the six-membered chelate ring of the ancillary ligand is proposed. Photophysical and computational studies show that neither pi-stacking nor restricted rotation cause the observed EPESS in these complexes and that ligand distortions in the triplet excited state are responsible for EPESS

DOI10.1002/ejic.201402495