The in-situ synthesis process and luminescence behavior of a p-hydroxybenzoic acid-terbium complex in sol-gel derived host materials

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xianping Fan
  • Xuhui Lv
  • Shaobin Li
  • Feng Wang
  • Minquan Wang

Detail(s)

Original languageEnglish
Pages (from-to)3560-3564
Journal / PublicationJournal of Materials Chemistry
Volume12
Issue number12
Publication statusPublished - 1 Dec 2002
Externally publishedYes

Abstract

The in-situ synthesis and photophysical properties of a p-hydroxybenzoic acid-terbium (PHBA-Tb3+) complex in sol-gel derived host materials have been investigated. The Raman scattering spectrum of a 1% TbCl3-3% PHBA co-doped gel was the same as that of the PHBA-Tb3+ complex powders synthesized in ethanolic solution, indicating that the PHBA-Tb3+ complex was synthesized in the 1% TbCl3-3% PHBA co-doped gel. The steady-state excitation and emission spectra of the 1% TbCl3-3% PHBA co-doped gel, which were similar to those of the PHBA-Tb3+ complex powders, also indicated the synthesis of the PHBA-Tb3+ complex in the 1% TbCl3-3% PHBA co-doped gel. The time-resolved spectra of the 1% TbCl3-3% PHBA co-doped gel indicated an efficient ligand-to-metal energy transfer, which also confirmed the synthesis of the PHBA-Tb3+ complex in the gel. The luminescence decay curve of the 1% TbCl3-3% PHBA co-doped gel could be fitted by a double-exponential function. Due to the less efficient non-radiative 5D4 relaxation processes in the gel, the presence of the PHBA-Tb3+ complex in the gel led to greatly increased 5D4 lifetimes.

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