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  4. Steric hindrance at metal centre quenches green phosphorescence of cationic iridium(III) complexes with 1-(2-pyridyl)-pyrazoles
 
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research article

Steric hindrance at metal centre quenches green phosphorescence of cationic iridium(III) complexes with 1-(2-pyridyl)-pyrazoles

Shavaleev, Nail M.  
•
Scopelliti, Rosario  
•
Graetzel, Michael  
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2013
Inorganica Chimica Acta

Cationic cyclometalated iridium(III) complexes (N,C-2'-2-phenylpyridyl)(2)Ir((NN)-N-boolean AND) with alkyl-substituted 1-(2'-pyridyl)-pyrazole (NN)-N-boolean AND ligands exhibit green phosphorescence from a cyclometalating-ligand-centered excited state with structured emission spectrum and with quantum yield and excited-state lifetime of up to 26% and 1.4 mu s in argon-saturated dichloromethane solution. The alkyl groups do not change the energy or the nature of the emissive state; however, those alkyl groups that hinder coordination of the (NN)-N-boolean AND ligand to iridium(III) strongly quench phosphorescence of the complex. (C) 2013 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.ica.2013.03.002
Web of Science ID

WOS:000320651900029

Author(s)
Shavaleev, Nail M.  
•
Scopelliti, Rosario  
•
Graetzel, Michael  
•
Nazeeruddin, Mohammad K.  
Date Issued

2013

Publisher

Elsevier

Published in
Inorganica Chimica Acta
Volume

404

Start page

210

End page

214

Subjects

Pyrazole

•

Ligand

•

Iridium

•

Complex

•

Cyclometalation

•

Phosphorescence

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
October 1, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/95697
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