New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands
Apstrakt
Surface modification of nanocrystalline TiO2 particles (45 ) 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.
Ključne reči:
TiO2 nanoparticles / Surface modification / Catechol / Pyrogallol / Gallic acidIzvor:
Nanoscale Research Letters, 2010, 5, 1, 81-88Finansiranje / projekti:
DOI: 10.1007/s11671-009-9447-y
ISSN: 1931-7573
WoS: 000272916400013
Scopus: 2-s2.0-77952887094
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Janković, Ivana A. AU - Šaponjić, Zoran AU - Džunuzović, Enis S. AU - Nedeljković, Jovan PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3853 AB - Surface modification of nanocrystalline TiO2 particles (45 ) 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. T2 - Nanoscale Research Letters T1 - New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands VL - 5 IS - 1 SP - 81 EP - 88 DO - 10.1007/s11671-009-9447-y ER -
@article{ author = "Janković, Ivana A. and Šaponjić, Zoran and Džunuzović, Enis S. and Nedeljković, Jovan", year = "2010", abstract = "Surface modification of nanocrystalline TiO2 particles (45 ) 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.", journal = "Nanoscale Research Letters", title = "New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands", volume = "5", number = "1", pages = "81-88", doi = "10.1007/s11671-009-9447-y" }
Janković, I. A., Šaponjić, Z., Džunuzović, E. S.,& Nedeljković, J.. (2010). New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands. in Nanoscale Research Letters, 5(1), 81-88. https://doi.org/10.1007/s11671-009-9447-y
Janković IA, Šaponjić Z, Džunuzović ES, Nedeljković J. New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands. in Nanoscale Research Letters. 2010;5(1):81-88. doi:10.1007/s11671-009-9447-y .
Janković, Ivana A., Šaponjić, Zoran, Džunuzović, Enis S., Nedeljković, Jovan, "New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands" in Nanoscale Research Letters, 5, no. 1 (2010):81-88, https://doi.org/10.1007/s11671-009-9447-y . .