Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 132, Issue 1-2, Pages 87-93Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2010.01.016
Keywords
Organic-inorganic periodic mesoporous organosilica; Lanthanide; Photoluminescence; Sulfide linkage
Categories
Funding
- National Natural Science Foundation of China [20971100]
- Program for New Century Excellent Talents in University [NCET-08-0398]
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Novel organic-inorganic periodic mesoporous organosilicas (PMOs) were synthesized by linking lanthanide (Tb3+, Eu3+) complexes to the framework of mesoporous through the modified 4-mercaptobenzoic acid (MCBA-Si) using co-condensation method in the presence of Pluronic P123 surfactant as a template. 4-mercaptobenzoic acid (MCBA) grafted to the coupling agent 3-(triethoxysilyl)-propyl isocyanate (TEPIC) was used as the precursor for the preparation of periodic mesoporous materials. The two kinds of resulting materials (denoted as Ln-MCBA-PMOs, Ln = Tb, Eu) were characterized in detail by fourier-transform infrared spectra, ultraviolet-visible diffuse reflection absorption spectra, Si-29 MAS NMR spectra, small-angle X-ray diffraction, nitrogen adsorption/desorption isotherms, photoluminescence spectroscopy and luminescence decay time measurements. The results reveal that luminescent periodic mesoporous materials have high surface area, uniformity in the mesopore structure and good crystallinity. Furthermore, the mesoporous material covalently bonded Tb3+ complex (Tb-MCBA-PMOs) exhibits the stronger characteristic emission of Tb3+ and longer lifetime than Eu-MCBA-PMOs due to the triplet state energy of organic ligand MCBA-Si matches with the emissive energy level of Tb3+ very well. (C) 2010 Elsevier Inc. All rights reserved.
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