Formation of six-coordinated silicon in calcium phosphosilicate xerogels assisted by polyols at low temperature and pressure

	Formation of six-coordinated silicon in calcium phosphosilicate xerogels assisted by polyols at low temperature and pressure
	Li, Ai-Ling; Ma, Yan-Ping; Qiu, Dong
刊名	CHINESE CHEMICAL LETTERS
	2015-06-01
卷号	26 期号:6 页码:768-772
关键词	Phosphosilicate Six-coordinated silicon Polyols MAS-NMR
英文摘要	Silicon is usually found to be four-coordinated when neighbored with oxygen. Six-coordinated silicon is only seen in samples at very specific composition or made at high temperature/pressure. In this study, we managed to synthesize calcium phosphosilicate xerogels containing six-coordinated silicon with the help of polyols by sol-gel method, without the need of treatment at high temperature or high pressure. Both phosphorus precursors and polyols were found to be essential for the formation of six-coordinated silicon species; in the absence of either species, only normal four-coordinated silicon was observed under otherwise identical conditions. Samples containing six-coordinated silicon sites were found to release silicon species faster than those without six-coordinated silicon sites upon dissolved in water, suggesting that six-coordinated silicon species have higher reactivity toward hydrolysis. (C) 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2015-11-02
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/27932]
专题	化学研究所_高分子物理与化学实验室
作者单位	Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Ai-Ling,Ma, Yan-Ping,Qiu, Dong. Formation of six-coordinated silicon in calcium phosphosilicate xerogels assisted by polyols at low temperature and pressure[J]. CHINESE CHEMICAL LETTERS,2015,26(6):768-772.
APA	Li, Ai-Ling,Ma, Yan-Ping,&Qiu, Dong.(2015).Formation of six-coordinated silicon in calcium phosphosilicate xerogels assisted by polyols at low temperature and pressure.CHINESE CHEMICAL LETTERS,26(6),768-772.
MLA	Li, Ai-Ling,et al."Formation of six-coordinated silicon in calcium phosphosilicate xerogels assisted by polyols at low temperature and pressure".CHINESE CHEMICAL LETTERS 26.6(2015):768-772.