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An investigation on the second-order nonlinear optical response of cationic bipyridine or phenanthroline iridium(iii) complexes bearing cyclometallated 2-phenylpyridines with a triphenylamine substituent

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Date
07/07/2018
Author
Hierlinger, Claus
Cordes, David B.
Slawin, Alexandra M. Z.
Colombo, Alessia
Dragonetti, Claudia
Righetto, Stefania
Roberto, Dominique
Jacquemin, Denis
Zysman-Colman, Eli
Guerchais, Veronique
Funder
EPSRC
Grant ID
EP/M02105X/1
Keywords
QD Chemistry
Inorganic Chemistry
DAS
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Abstract
The synthesis and characterisation of six new cationic iridium(iii) complexes bearing either 4,4′-di-tert-butyl-2,2′-bipyridine (dtBubpy) or 5-NO2-1,10-phenanthroline along with two cyclometallated 2-phenylpyridine derivative ligands, decorated with triphenylamine groups either meta or para to the Ir-CC^N bond or para to the Ir-NC^N bond, are reported. The second-order nonlinear optical (NLO) properties of all the compounds have been determined by the electric field induced second harmonic generation technique and show that the μβEFISH value can be tuned by the nature of the iridium coordination sphere. The dipole moment, μ, necessary to evaluate the quadratic hyperpolarizability βEFISH, was theoretically determined. The linear optical properties of the complexes are also presented and rationalised by quantum-chemical calculations. One of the prepared iridium compounds was incorporated into a polystyrene film, affording the first example of a second-order NLO active polymeric film based on a cationic organometallic complex.
Citation
Hierlinger , C , Cordes , D B , Slawin , A M Z , Colombo , A , Dragonetti , C , Righetto , S , Roberto , D , Jacquemin , D , Zysman-Colman , E & Guerchais , V 2018 , ' An investigation on the second-order nonlinear optical response of cationic bipyridine or phenanthroline iridium(iii) complexes bearing cyclometallated 2-phenylpyridines with a triphenylamine substituent ' , Dalton Transactions , vol. 47 , no. 25 , pp. 8292-8300 . https://doi.org/10.1039/c8dt00754c
Publication
Dalton Transactions
Status
Peer reviewed
DOI
https://doi.org/10.1039/c8dt00754c
ISSN
1477-9226
Type
Journal article
Rights
© 2018 The Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1039/C8DT00754C
Description
This work was supported by MIUR, CNR and the National Interuniversity Consortium of Materials Science and Technology (Project INSTMMI012) in Italy. C.H. acknowledges Région Bretagne, France, for funding. E.Z.-C. acknowledges the University of St Andrews and EPSRC (EP/M02105X/1) for financial support.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/17775

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