Ray, Debdas ; Iyer, E. Siva Subramaniam ; Sadhu, Kalyan K. ; Bharadwaj, Parimal K. (2009) Ag(I) induced emission with azines having donor-acceptor-donor chromophore Dalton Transactions (29). pp. 5683-5687. ISSN 1477-9226
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Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/2009...
Related URL: http://dx.doi.org/10.1039/B820481K
Abstract
Two azine molecules, [3-{4-(dimethylamino)phenyl}prop-2-en-1-ylidene]hydrazone (HL) and [4-(dimethylamino)benzylidene]hydrazone (LL) synthesized via Schiff base condensation, show an absorption band due to intra-ligand charge transfer (ILCT). Both ligands show weak emission in the absence of a metal ion as input. When Ag+ ions are added to either compound in THF, the metal ion gets bonded to the azine moiety resulting in a high intensity emission (~400 fold). While Cu+ shows a slight enhancement of emission, other first-row transition, alkali or alkaline-earth metal ions do not show any emission allowing Ag+ ions to be detected in the presence of these metal ions. Both the Ag+ complexes were characterised by X-ray crystallography and show solid-state spectra similar to their solution spectra. Time-resolved fluorescence measurements done on the complexes show two excited-state lifetimes.
Item Type: | Article |
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Source: | Copyright of this article belongs to Royal Society of Chemistry. |
ID Code: | 4988 |
Deposited On: | 18 Oct 2010 06:00 |
Last Modified: | 18 May 2011 07:52 |
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