Construction of hybrid material with double chemical bond from functional bridge ligand: Molecular modification, lotus root-like micromorphology and strong luminescence
✍ Scribed by Bing Yan; Yu-Long Sui
- Book ID
- 104075166
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 262 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0925-3467
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✦ Synopsis
Modifying benzoic acid with a cross-linking molecule (3-aminopropyl)triethoxysilane (abbreviated as APES), a fictional molecular bridge with double reactivity was achieved by the amidation reaction between them. Then the modified functional molecule, which behaving as a bridge, both coordinate with terbium ion through amideÕs oxygen atom and form the Si-O chemical bond in an in situ sol-gel process with matrix precursor (tetraethoxysilane, TEOS). As a result, a novel molecular hybrid material (Tb-BA-APES) with double chemical bond (Tb-O coordination bond and Si-O covalent bond) was constructed. The strong luminescence of Tb 3+ substantiates optimum energy couple and effective intramolecular energy transfer between the triplet state energy of modified ligand bridge and emissive energy level of Tb 3+ . Especially SEM of the molecular hybrid material exhibits unexpected microlotus root-like pore morphology.