title: Photophysical properties of rare earth (Eu3+, Sm3+, Tb3+) complex covalently immobilized in hybrid Si-O-B xerogels.
abstract: The molecular linkage (phenSi) from functionalized 5-amino-1,10-phenanthroline (PhenNH(2)) by 3-(triethoxysilyl)-propyl isocyanate (TESPIC) is to construct the rare earth (Sm(3+), Eu(3+), Tb(3+)) center covalently immobilized in the hybrid xerogels of Si-O-B through the cohydrolysis and copolycondensation process between different alkoxide precursors of them (tetraethoxysilane (TEOS), tri-n-butylborate (TBB)). NMR, FTIR and ultraviolet absorption are measured to confirm the obtained materials. X-ray diffraction patterns revealed the hybrid materials are amorphous. Scanning electronic microscopy images show the stripe microstructure without phase separation phenomenon in the obtained hybrid materials. The covalently bonded Si-O-B hybrid xerogel presents the similar photoluminescent behavior to the pure Si-O-Si hybrid xerogels, which indicates that Si-O-B hybrid xerogel is a suitable system for the luminescence of RE(3+).
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
authors.forename: Chang
authors.initials: C
authors.lastname: Wang
authors.forename: Bing
authors.initials: B
authors.lastname: Yan
mesh_terms: D001881:Borates / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D049449:Luminescence; D008674:Metals, Rare Earth / Q000737:chemistry*; D015394:Molecular Structure; D055668:Photochemical Processes; D012825:Silicon / Q000737:chemistry*
chemical_list: D001881:Borates; D005782:Gels; D008674:Metals, Rare Earth; D012825:Silicon