New Hybrid Properties of TiO(2) Nanoparticles Surface Modified With Catecholate Type Ligands.

Nanoscale Research Letters
Ivana A JankovićJovan M Nedeljković

Abstract

Surface modification of nanocrystalline TiO(2) particles (45 A) with bidentate benzene derivatives (catechol, pyrogallol, and gallic acid) was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge-transfer complexes results in a red shift of the semiconductor absorption compared to unmodified nanocrystallites. The binding structures were investigated by using FTIR spectroscopy. The investigated ligands have the optimal geometry for chelating surface Ti atoms, resulting in ring coordination complexes (catecholate type of binuclear bidentate binding-bridging) thus restoring in six-coordinated octahedral geometry of surface Ti atoms. From the Benesi-Hildebrand plot, the stability constants at pH 2 of the order 10(3) M(-1) have been determined.

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Citations

Sep 24, 2015·ACS Applied Materials & Interfaces·Ana B Muñoz-GarcíaGerardino D'Errico
Jun 4, 2013·Journal of Controlled Release : Official Journal of the Controlled Release Society·Hong Jae LeeSang Cheon Lee
Mar 25, 2017·ACS Applied Materials & Interfaces·Ali OthmanSilvana Andreescu
Sep 3, 2019·Chemical Communications : Chem Comm·Franco CenturionMd Arifur Rahim
Apr 21, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Tania HidalgoPatricia Horcajada
Oct 25, 2013·Nanoscale·Julie BolleyLaurence Motte
Sep 10, 2013·RSC Advances·Rıfat Emrah OzelSilvana Andreescu
Feb 18, 2011·Journal of the American Chemical Society·Giuseppe CernutoAntonietta Guagliardi
Oct 2, 2013·Journal of Agricultural and Food Chemistry·Mahmoudreza OvissipourBarbara Rasco
Jun 23, 2020·Accounts of Chemical Research·Jiajing ZhouFrank Caruso

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Methods Mentioned

BETA
dynamic light scattering

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