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

Shunsheng Zhao*, Xiangrong Liu, Wai Yeung WONG, Xingqiang Lü, Rick W K WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)160-164
Number of pages5
JournalInorganica Chimica Acta
Volume414
DOIs
Publication statusPublished - 1 Apr 2014

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

User-Defined Keywords

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

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