Reaction of titanium isopropoxide with alkanolamines and association of the resultant Ti species

被引:32
作者
Ban, T [1 ]
Ohya, Y [1 ]
Takahashi, Y [1 ]
机构
[1] Gifu Univ, Dept Mat Sci & Technol, Gifu 5011193, Japan
关键词
precursor chemistry; alkanolamine; titanium alkoxide; association;
D O I
10.1023/A:1024033423389
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A clear alcoholic solution of titanium alkoxide with an addition of various alkanolamines is suitable for a sol-gel coating of titania films. The reaction of titanium isopropoxide, Ti(OPri)(4) (TIP), with alkanolamines, such as triethanolamine (TEAH(3)), diethanolamine (DEAH(2)), and N-ethyldiethanolamine (EDEAH(2)), and an association of the Ti species in the resultant mixtures were examined via liquid-state nuclear magnetic resonance ( NMR), infrared spectroscopy (IR), and cryoscopy measurements. Regardless of the kinds of the alkanolamines used, the IR and NMR spectra showed that alcohol exchange reactions occurred between the alcoholic moieties in alkanolamines and the isopropoxy groups in TIP, and that the N atom in the alkanolamines might be datively bonded to Ti. In the DEAH(2) and EDEAH(2) systems with the molar ratio of amine/TIP = 1, the results of the NMR and cryoscopy measurements showed that an association degree of the formed Ti species increased with an increase in the concentration of TIP, according to the thermodynamical equilibriums of associations between various oligomers. The increase was larger in the DEAH(2) system than in the EDEAH(2) one, because of the larger equilibrium constants due to the smaller size of the DEA group. In the system of EDEAH(2)/TIP = 2, the NMR spectra showed that only one kind of oligomer was formed as a Ti species, independent of the concentration of TIP. The oligomer may be a much more stable species than other species. The cryoscopy results showed that the oligomer had a tetrameric structure.
引用
收藏
页码:363 / 372
页数:10
相关论文
共 22 条
[1]  
[Anonymous], PHYS PROPERTIES META
[2]   XANES AND EXAFS STUDY OF TITANIUM ALKOXIDES [J].
BABONNEAU, F ;
DOEUFF, S ;
LEAUSTIC, A ;
SANCHEZ, C ;
CARTIER, C ;
VERDAGUER, M .
INORGANIC CHEMISTRY, 1988, 27 (18) :3166-3172
[3]   Influence of the addition of alkanolamines and tetramethylammonium hydroxide on the shape and size of zeolite-A particles [J].
Ban, T ;
Ohwaki, T ;
Ohya, Y ;
Takahashi, Y .
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 1999, 1 (3-4) :243-251
[4]  
CLARK RJH, 1973, TITANIUM COMPREHENSI, V3, P355
[5]  
DOEUFF SB, 1994, MAT RES B, V29, P1
[6]   Titanium amino alcohol complexes from α-titanic acid:: X-ray crystal structure of titanium bis[2,2′-(methylimino)diethanolate] [J].
Kemmitt, T ;
Al-Salim, NI ;
Gainsford, GJ ;
Henderson, W .
AUSTRALIAN JOURNAL OF CHEMISTRY, 1999, 52 (10) :915-919
[7]  
Kumar V, 1996, J AM CERAM SOC, V79, P2775, DOI 10.1111/j.1151-2916.1996.tb09049.x
[8]   Processable aluminosilicate alkoxide precursors from metal oxides and hydroxides. The oxide one-pot synthesis process [J].
Laine, RM ;
Treadwell, DR ;
Mueller, BL ;
Bickmore, CR ;
Waldner, KF ;
Hinklin, TR .
JOURNAL OF MATERIALS CHEMISTRY, 1996, 6 (08) :1441-1443
[9]   MONOMERIC AND DIMERIC TITANATRANES [J].
MENGE, WMPB ;
VERKADE, JG .
INORGANIC CHEMISTRY, 1991, 30 (24) :4628-4631
[10]   TITANATRANES AND AZATITANATRANES - NUCLEOPHILIC-SUBSTITUTION REACTIONS ON THE AXIAL POSITION [J].
NAIINI, AA ;
MENGE, WMPB ;
VERKADE, JG .
INORGANIC CHEMISTRY, 1991, 30 (26) :5009-5012