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Title: Pyridine imines as ligands in luminescent iridium complexes
Authors: Davies, David L.
Lelj, Francesco
Lowe, Mark P.
Ryder, Karl S.
Singh, Kuldip
Singh, Shalini
First Published: 13-Jan-2014
Publisher: Royal Society of Chemistry
Citation: Dalton Transactions, 2014
Abstract: Biscyclometallated iridium complexes [Ir(ppz)[subscript 2](X^Y)][PF[subscript 6]] (X^Y = pyridine imine) have been synthesised. The pyridineimine ligands are prepared in situ during the complexation. The complexes show room temperature emission between 640 and 780 nm in CH[subscript 2]Cl[subscript 2] solution. The emission is red shifted compared with the analogous bipyridine complex [Ir(ppz)[subscript 2](bipy)][PF[subscript 6]]. DFT calculations have been used to shed light on the influence of the imine substituent on the electrochemical and photochemical properties. In particular, the calculations suggests that there is a significant change in geometry between the ground state and the first triplet excited state for arylimines but not for alkylimines, leading to much weaker emission for the arylimine complexes. The work demonstrates that pyridineimines can be used as a substitute for bipyridines in luminescent iridium complexes.
DOI Link: 10.1039/c3dt52975d
ISSN: 1477-9226
eISSN: 1477-9234
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2014, The Royal Society of Chemist. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Chemistry

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