Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives
Apstrakt
Surface modification of nanocrystalline TiO2 particles (45 and ) with bidentate benzene derivatives, that is, 2-hydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, and catechol was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge transfer (CT) 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 or salycilate type of binuclear bidentate binding), thus restoring 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.
Izvor:
Journal of Physical Chemistry. C, 2009, 113, 29, 12645-12652Finansiranje / projekti:
- Sinteza i karakterizacija nanočestica i nanokompozita (RS-MESTD-MPN2006-2010-142066)
DOI: 10.1021/jp9013338
ISSN: 1932-7447
WoS: 000268139800007
Scopus: 2-s2.0-68049132958
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Janković, Ivana A. AU - Šaponjić, Zoran AU - Čomor, Mirjana AU - Nedeljković, Jovan PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3745 AB - Surface modification of nanocrystalline TiO2 particles (45 and ) with bidentate benzene derivatives, that is, 2-hydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, and catechol was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge transfer (CT) 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 or salycilate type of binuclear bidentate binding), thus restoring 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. T2 - Journal of Physical Chemistry. C T1 - Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives VL - 113 IS - 29 SP - 12645 EP - 12652 DO - 10.1021/jp9013338 ER -
@article{ author = "Janković, Ivana A. and Šaponjić, Zoran and Čomor, Mirjana and Nedeljković, Jovan", year = "2009", abstract = "Surface modification of nanocrystalline TiO2 particles (45 and ) with bidentate benzene derivatives, that is, 2-hydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, and catechol was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge transfer (CT) 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 or salycilate type of binuclear bidentate binding), thus restoring 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.", journal = "Journal of Physical Chemistry. C", title = "Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives", volume = "113", number = "29", pages = "12645-12652", doi = "10.1021/jp9013338" }
Janković, I. A., Šaponjić, Z., Čomor, M.,& Nedeljković, J.. (2009). Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives. in Journal of Physical Chemistry. C, 113(29), 12645-12652. https://doi.org/10.1021/jp9013338
Janković IA, Šaponjić Z, Čomor M, Nedeljković J. Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives. in Journal of Physical Chemistry. C. 2009;113(29):12645-12652. doi:10.1021/jp9013338 .
Janković, Ivana A., Šaponjić, Zoran, Čomor, Mirjana, Nedeljković, Jovan, "Surface Modification of Colloidal TiO2 Nanoparticles with Bidentate Benzene Derivatives" in Journal of Physical Chemistry. C, 113, no. 29 (2009):12645-12652, https://doi.org/10.1021/jp9013338 . .