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题名Near-infrared spectroscopic study of [AlO4 Al12(OH)23(H2O)12] 7+ - O-Si(OH)3 nitrate crystals formed by forced hydrolysis of Al3+ in the presence of teos
作者
发表日期2000
发表期刊Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
ISSN/eISSN1386-1425
卷号56期号:12页码:2405- 2411
摘要

The polymer [AlO4Al12(OH)23(H2O)12]7+-O-Si(OH)3 was prepared by forced hydrolysis of Al3+ up to an OH/Al molar ratio of 2.0 in the presence of monomeric orthosilicic acid. Crystalline material was obtained by slow evaporation. Although the near-infrared spectra of the Al13-sulfate and Al13-O-Si(OH)3 are very similar, there are differences related to the bonding of the -O-Si(OH)3 group to the Al13-unit. The strong complex of bands around 7000 cm−1 associated with the overtones and combination bands of the OH-stretching modes for Al13-sulfate is much weaker for Al13-O-Si(OH)3 and the opposite is true for the complex of bands around 5000 cm−1 associated with the water overtone and combination modes, suggesting that the outer OH-groups of the Al13-unit are involved in the formation of the new Al13-O-Si(OH)3 units. A weak band around 7370–7631 cm−1 is interpreted as the overtone of the SiOH stretching vibration around 3740 cm−1. A low intensity band, absent for Al13-sulfate and -nitrate is observed around 5550–5570 cm−1 and is interpreted as the overtone of the OH-stretching mode of the OH-groups in the vicinity of the central AlO4 in the Al13-unit around 2890–2935 cm−1. The interaction between the -O-Si(OH)3 group and the Al13-unit has a small influence on other bands like the combination modes of water in the 4400–4800 cm−1 region, which show a small shift towards higher wavenumbers. The internal OH-groups in the Al13-complex are relatively shielded by the water molecules and therefore do not reflect the influence of the -O-Si(OH)3 in their band positions.

关键词Aluminium Forced hydrolysis Infiared spectroscopy Near-infrared spectroscopy Tetraethyl orthosilicate (TEOS)
DOI10.1016/S1386-1425(00)00297-3
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收录类别SCIE
语种英语English
WOS研究方向Spectroscopy
WOS类目Spectroscopy
WOS记录号WOS:000089654400010
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符https://repository.uic.edu.cn/handle/39GCC9TT/4704
专题个人在本单位外知识产出
通讯作者Kloprogge, J.Theo
作者单位
Centre for Instrumental and Developmental Chemistry, Queensland University of Technology, 2 George Street, GPO Box 2434, Brisbane, Qld 4001, Australia
推荐引用方式
GB/T 7714
Kloprogge, J.Theo,Ruan, Huada,Frost, Ray L. Near-infrared spectroscopic study of [AlO4 Al12(OH)23(H2O)12] 7+ - O-Si(OH)3 nitrate crystals formed by forced hydrolysis of Al3+ in the presence of teos[J]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2000, 56(12): 2405- 2411.
APA Kloprogge, J.Theo, Ruan, Huada, & Frost, Ray L. (2000). Near-infrared spectroscopic study of [AlO4 Al12(OH)23(H2O)12] 7+ - O-Si(OH)3 nitrate crystals formed by forced hydrolysis of Al3+ in the presence of teos. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 56(12), 2405- 2411.
MLA Kloprogge, J.Theo,et al."Near-infrared spectroscopic study of [AlO4 Al12(OH)23(H2O)12] 7+ - O-Si(OH)3 nitrate crystals formed by forced hydrolysis of Al3+ in the presence of teos". Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 56.12(2000): 2405- 2411.
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