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Title: Ag(i) induced emission with azines having donor-acceptor-donor chromophore
Authors: Ray D.
Iyer E.S.S.
Sadhu, Kalyan Kumar
Bharadwaj P.K.
Published in: Dalton Transactions
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. © The Royal Society of Chemistry 2009.
Citation: Dalton Transactions(29): 5683-5687
Issue Date: 2009
Keywords: Absorption band
Alkaline-earth metal ions
Excited-state lifetime
High intensity
Schiff base condensation
Solid-state spectra
Time-resolved fluorescence measurements
Charge transfer
Functional groups
Ion exchange
Metal ions
Trace analysis
X ray crystallography
hydrazone derivative
organometallic compound
Schiff base
chemical structure
X ray crystallography
Crystallography, X-Ray
Models, Molecular
Molecular Structure
Organometallic Compounds
Schiff Bases
ISSN: 14779226
Author Scopus IDs: 13411225500
Author Affiliations: Ray, D., Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
Iyer, E.S.S., Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
Sadhu, K.K., Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
Bharadwaj, P.K., Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
Corresponding Author: Bharadwaj, P. K.; Department of Chemistry, , Kanpur 208016, India; email:
Appears in Collections:Journal Publications [CY]

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