Structural investigation of the hydrolysis-condensation process of modified titanium isopropoxide

M. W. Jung, H. J. Oh, J. C. Yang, Yong-Gun Shul

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Abstract

The structures of modified Ti(OPr(i)) 4 with chelating ligands (L) such as ethylacetoacetate (Etac), acetylacetone (Acac) and methylacetoacetate (Mtac) were identified by using IR, 1 H NMR and 13 C NMR spectroscopies, and the octahedral structure was confirmed after modification. The pre-edge peaks of XANES spectra of modified metal alkoxides also denoted the mixture of five-fold and six-fold structures. The EXAFS fitting results showed the local structure around Ti atom after alkoxide modification. The hydrolysis- condensation rates of modified Ti alkoxide with organic additives were investigated by 1 H NMR spectroscopy. The Ti(OPr(i)) 4 modified by Acac was less reactive toward hydrolysis-condensation reaction than those modified by the other alkoxides, which can be attributed to the stable ligand structure between Ti(OPr(i)) 4 and Acac. The small particle size of modified Ti(OPr(i)) 4 sol was obtained when Acac was employed.

Original languageEnglish
Pages (from-to)1394-1398
Number of pages5
JournalBulletin of the Korean Chemical Society
Volume20
Issue number12
Publication statusPublished - 1999 Dec 20

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Condensation
Hydrolysis
Nuclear magnetic resonance spectroscopy
Ligands
Condensation reactions
Polymethyl Methacrylate
Chelation
Metals
Particle size
Nuclear magnetic resonance
Atoms
acetylacetone
titanium isopropoxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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abstract = "The structures of modified Ti(OPr(i)) 4 with chelating ligands (L) such as ethylacetoacetate (Etac), acetylacetone (Acac) and methylacetoacetate (Mtac) were identified by using IR, 1 H NMR and 13 C NMR spectroscopies, and the octahedral structure was confirmed after modification. The pre-edge peaks of XANES spectra of modified metal alkoxides also denoted the mixture of five-fold and six-fold structures. The EXAFS fitting results showed the local structure around Ti atom after alkoxide modification. The hydrolysis- condensation rates of modified Ti alkoxide with organic additives were investigated by 1 H NMR spectroscopy. The Ti(OPr(i)) 4 modified by Acac was less reactive toward hydrolysis-condensation reaction than those modified by the other alkoxides, which can be attributed to the stable ligand structure between Ti(OPr(i)) 4 and Acac. The small particle size of modified Ti(OPr(i)) 4 sol was obtained when Acac was employed.",
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Structural investigation of the hydrolysis-condensation process of modified titanium isopropoxide. / Jung, M. W.; Oh, H. J.; Yang, J. C.; Shul, Yong-Gun.

In: Bulletin of the Korean Chemical Society, Vol. 20, No. 12, 20.12.1999, p. 1394-1398.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural investigation of the hydrolysis-condensation process of modified titanium isopropoxide

AU - Jung, M. W.

AU - Oh, H. J.

AU - Yang, J. C.

AU - Shul, Yong-Gun

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AB - The structures of modified Ti(OPr(i)) 4 with chelating ligands (L) such as ethylacetoacetate (Etac), acetylacetone (Acac) and methylacetoacetate (Mtac) were identified by using IR, 1 H NMR and 13 C NMR spectroscopies, and the octahedral structure was confirmed after modification. The pre-edge peaks of XANES spectra of modified metal alkoxides also denoted the mixture of five-fold and six-fold structures. The EXAFS fitting results showed the local structure around Ti atom after alkoxide modification. The hydrolysis- condensation rates of modified Ti alkoxide with organic additives were investigated by 1 H NMR spectroscopy. The Ti(OPr(i)) 4 modified by Acac was less reactive toward hydrolysis-condensation reaction than those modified by the other alkoxides, which can be attributed to the stable ligand structure between Ti(OPr(i)) 4 and Acac. The small particle size of modified Ti(OPr(i)) 4 sol was obtained when Acac was employed.

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