NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >


Title: Cyclometalated Ir(III) complexes containing ancillary pyrazole-based ligands
Authors: Hajra, Tanima
Ghosh, Soumya
Bera, Jitendra K
Chandrasekhar, Vadapalli
Keywords: Coordination chemistry
Cyclometallated complexes
Pyrazoles
Iridium
Photophysical properties
Colour tuning
Luminescence
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: A series of neutral mononuclear cyclometalated Ir(III) complexes, [Ir(ppy)2(Me2pzH)Cl] (1), [Ir(ppy)2(MepzH)Cl] (2), [Ir(ppy)2(Mepz)(MepzH)] (3), [Ir(ppy)2(Phpz)(PhpzH)] (4), [Ir(ppy)2(NPpz)(NPpzH)] (5) and [Ir(ppy)2(NP-2-pz)(NP-2-pzH)] (6) [where ppyH = 2-phenylpyridine; Me2pzH = 3,5-dimethylpyrazole; MepzH = 3-methylpyrazole; PhpzH = 3-phenylpyrazole; NPpzH = 3-(1-naphthyl)pyrazole; NP-2-pzH = 3-(2-naphthyl)pyrazole) have been synthesised and structurally characterised. While (1) and (2) contain neutral pyrazole ligands which binds in a κ1 manner, in compounds (3)-(6), one of the pyrazole ligands is anionic while the other is neutral. In the latter also the pyrazole ligands bind to the metal in a κ1 manner. Further, the two types of pyrazoles interact with each other by H-bonded interaction. The photophysical and electrochemical properties of all of these compounds have been studied which reveal that the absorption/emission behaviour of these compounds is dependent on the Ir(ppy)2 unit of the complexes; the ancillary pyrazole ligands do not influence the photophysical behavior in any significant manner.
Page(s): 1290-1297
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(09-10) [September-October 2011]

Files in This Item:

File Description SizeFormat
IJCA 50A(09-10) 1290-1297.pdf384.89 kBAdobe PDFView/Open
 Current Page Visits: 462 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 510484 since 06-Feb-2009  Last updated on 11-Apr-2014Webmaster: nopr@niscair.res.in