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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11674

Title: Ag(I) induced emission with azines having donor-acceptor-donor chromophore
Authors: RAY, D
IYER, ESS
SADHU, KK
BHARADWAJ, PK
Keywords: transition-metal ions
silver ion
fluorescent chemosensor
escherichia-coli
antimicrobial agent
energy-transfer
excited-state
cu-ii
ag-i
complexes
Issue Date: 2009
Publisher: ROYAL SOC CHEMISTRY
Citation: DALTON TRANSACTIONS, (29), 5683-5687
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 (similar to 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.
URI: http://dx.doi.org/10.1039/b820481k
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11674
http://hdl.handle.net/10054/11674
ISSN: 1477-9226
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