New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands
<p>Abstract</p> <p>Surface modification of nanocrystalline TiO<sub>2</sub> particles (45 Å) with bidentate benzene derivatives (catechol, pyrogallol, and gallic acid) was found to alter optical properties of nanoparticles. The formation of the inner-sphere char...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2009-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-009-9447-y |
| _version_ | 1797762464344965120 |
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| author | Džunuzović Enis Janković Ivana Šaponjić Zoran Nedeljković Jovan |
| author_facet | Džunuzović Enis Janković Ivana Šaponjić Zoran Nedeljković Jovan |
| author_sort | Džunuzović Enis |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Surface modification of nanocrystalline TiO<sub>2</sub> particles (45 Å) 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<sup>3</sup> M<sup>−1</sup> have been determined.</p> |
| first_indexed | 2024-03-12T19:28:44Z |
| format | Article |
| id | doaj.art-879b14f72be44468b5a2dd4feb5bba21 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T19:28:44Z |
| publishDate | 2009-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-879b14f72be44468b5a2dd4feb5bba212023-08-02T04:45:27ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2009-01-01518188New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type LigandsDžunuzović EnisJanković IvanaŠaponjić ZoranNedeljković Jovan<p>Abstract</p> <p>Surface modification of nanocrystalline TiO<sub>2</sub> particles (45 Å) 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<sup>3</sup> M<sup>−1</sup> have been determined.</p>http://dx.doi.org/10.1007/s11671-009-9447-yTiO<sub>2</sub> nanoparticlesSurface modificationCatecholPyrogallolGallic acid |
| spellingShingle | Džunuzović Enis Janković Ivana Šaponjić Zoran Nedeljković Jovan New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands Nanoscale Research Letters TiO<sub>2</sub> nanoparticles Surface modification Catechol Pyrogallol Gallic acid |
| title | New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands |
| title_full | New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands |
| title_fullStr | New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands |
| title_full_unstemmed | New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands |
| title_short | New Hybrid Properties of TiO<sub>2</sub> Nanoparticles Surface Modified With Catecholate Type Ligands |
| title_sort | new hybrid properties of tio sub 2 sub nanoparticles surface modified with catecholate type ligands |
| topic | TiO<sub>2</sub> nanoparticles Surface modification Catechol Pyrogallol Gallic acid |
| url | http://dx.doi.org/10.1007/s11671-009-9447-y |
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