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Construction of luminescent molecular-based hybrid material with double chemical bond from functional bridge ligand through in-situ sol-gel process

BING YAN1,* , LI-MIN ZHAO1

Affiliation

  1. Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, China

Abstract

Modification of ortho tolylacetic acid (OTA) by means of the amidation reaction with a crosslinking molecule (3-aminopropyl)trimethoxysilane, abbreviated as APMS) was afford to a functional molecular bridge (OTA-APMS) with double activity. Then the modified functional molecular bridge further exhibits (behave) double function: one is to coordinate to terbium ion through amide’ oxygen atom, the other is to form the covalent bond with the Si-O network matrix precursor (tetraethoxysilane, TEOS) by an in-situ sol-gel process. (resulting in) A novel molecular hybrid material (named as Tb-OTA-APMS) with double chemical bonds (Tb-O coordination bond and Si-O covalent bond) resulted. The photophysical properties of the molecular hybrid material were determined by ultraviolet absorption, phosphorescent, and fluorescence spectra. The strong luminescence of Tb3+ verifies optimum energy match and effective intramolecular energy transfer between the triplet state energy of modified ligand bridge and emission energy level of Tb3+..

Keywords

Molecular hybrid material, Covalently bonded, Photoluminescence, Terbium.

Submitted at: April 19, 2006
Accepted at: May 18, 2006

Citation

BING YAN, LI-MIN ZHAO, Construction of luminescent molecular-based hybrid material with double chemical bond from functional bridge ligand through in-situ sol-gel process, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1298-1301 (2006)