Jump to main content
Jump to site search

Issue 39, 2011
Previous Article Next Article

Novel lanthanide luminescent materials based on multifunctional complexes of 2-sulfanylpyridine-3-carboxylic acid and silica/titania hosts

Author affiliations

Abstract

Three different types of organic–inorganic hybrid materials formed by trivalent lanthanide (Ln3+ = Eu3+, Tb3+) complexes covalently grafted to silica-, titania-, or silica/titania-based hosts have been prepared and fully characterized. Since the organic ligand 2-sulfanylpyridine-3-carboxylic acid (SPC), a derivative of nicotinic acid, exhibits three potential binding sites (pyridine N, sulfhydryl S and carboxylic O), the multifunctional precursor can be prepared through the reaction of the carboxylic group with titanium alkoxide and the modification of the sulfhydryl group with silane crosslinking reagents. Thus, the organic–inorganic hybrid materials covalently grafted with Eu3+ or Tb3+ complexes are synthesized through coordination of the Ln3+ ions with the heterocyclic group in the multifunctional precursor during the sol–gel process. The obtained hybrid materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TG), Fourier transform infrared (FTIR) spectroscopy, and photoluminescence (PL). The detailed PL studies showed that, compared with the titania-based hybrid materials (denoted as Ln–SPC–Ti), the silica- and silica/titania-based hybrid materials (denoted as Ln–SPCSi and Ln–SPCSi–Ti, respectively) exhibited higher luminescence intensity and emission quantum efficiency.

Graphical abstract: Novel lanthanide luminescent materials based on multifunctional complexes of 2-sulfanylpyridine-3-carboxylic acid and silica/titania hosts

Back to tab navigation

Supplementary files

Article information


Submitted
21 May 2011
Accepted
28 Jul 2011
First published
26 Aug 2011

J. Mater. Chem., 2011,21, 15600-15607
Article type
Paper

Novel lanthanide luminescent materials based on multifunctional complexes of 2-sulfanylpyridine-3-carboxylic acid and silica/titania hosts

L. Guo, L. Fu, R. A. S. Ferreira, L. D. Carlos, Q. Li and B. Yan, J. Mater. Chem., 2011, 21, 15600
DOI: 10.1039/C1JM12264A

Search articles by author

Spotlight

Advertisements