Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Near infrared luminescent hexanuclear zinc–lanthanide prisms: Synthesis, structure and luminescent properties

Language

English

Abstract

The use of the Schiff-base ligand N,N′-bis(3-methoxysalicylidene) ethylene-1,2-diamine (H2L) and fumarate (fum) enables the construction of the hexanuclear luminescent Zn-Ln complexes [Zn 4Ln2L4(fum)2] (NO3) 2·3CH3OH (Ln = Nd 1; Yb 2; Er 3; Gd 4). The complexes have been characterized by elemental analysis, FT-IR spectra and ESI mass spectrometer. The single crystal X-ray crystallographic study has been carried out on 1. Luminescent properties of these complexes including UV-Vis absorption spectra, excitation, visible and NIR region emission spectra, and NIR emission lifetime have been determined. The intrinsic near-infrared luminescent quantum yield of 1 and 2 are estimated to be 0.63% and 0.84% calculated from the observed lifetime and the natural lifetime of the lanthanide ions, respectively. Systematic analysis suggests that enhancement of near infrared emission could be observed upon construction of the stable polynuclear structures. © 2014 Elsevier B.V. All rights reserved.

Keywords

Fumarate, Luminescent prism, Near-infrared, Schiff-base, Sensitization and energy transfer

Publication Date

2014

Source Publication Title

Inorganica Chimica Acta

Volume

414

Start Page

160

End Page

164

Publisher

Elsevier

DOI

10.1016/j.ica.2014.02.003

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.ica.2014.02.003

ISSN (print)

00201693

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