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

M. W. Jung; H. J. Oh; J. C. Yang; Y. G. Shul

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

M. W. Jung, H. J. Oh, J. C. Yang, Y. G. Shul

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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, ¹H NMR and ¹³C 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 ¹H 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 language	English
Pages (from-to)	1394-1398
Number of pages	5
Journal	Bulletin of the Korean Chemical Society
Volume	20
Issue number	12
Publication status	Published - 1999 Dec 20

All Science Journal Classification (ASJC) codes

Chemistry(all)

Cite this

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title = "Structural investigation of the hydrolysis-condensation process of modified titanium isopropoxide",

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, 1H NMR and 13C 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 1H 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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year = "1999",

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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, Y. G.

PY - 1999/12/20

Y1 - 1999/12/20

N2 - 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, 1H NMR and 13C 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 1H 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.

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, 1H NMR and 13C 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 1H 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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AN - SCOPUS:0033590175

SN - 0253-2964

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JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 12

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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