n-alkylsiloxanes: From single monolayers to layered crystals. The formation of crystalline polymers from the hydrolysis of n-octadecyltrichlorosilane
n-alkylsiloxanes: From single monolayers to layered crystals. The formation of crystalline polymers from the hydrolysis of n-octadecyltrichlorosilane
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DOI：
10.1021/ja963284p
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发表时间：
1997-04-02
影响因子：
15
通讯作者：
Allara, DL
中科院分区：
文献类型：
--
作者：
Parikh, AN;Schivley, MA;Allara, DL
证明了通过正烷基三氯硅烷在水中的简单水解缩聚可形成一类新型层状微晶聚合物。结合光谱、衍射和热分析技术确定的聚合物缩合物的结构由高度均匀的柱状微晶组成，其中无机硅氧基主链存在于周期性层中，每个层包含插入水的单分子层，由烷基链的晶体组件分隔开。烷基链组织与由前体硅烷分子在亲水性基底上形成的高度组织化的自组装单分子层非常相似，这种相似性支持了水在硅烷单层自组装中的至关重要性。
Formation of a new class of layered, microcrystalline polymers from a simple hydrolytic polycondensation of n-alkyltrichlorosilanes in water is demonstrated. The structure of the polymeric condensate, determined from a combination of spectroscopic, diffraction, and thermal analysis techniques, consists of highly uniform, pillared microcrystallites in which the inorganic siloxy backbones are present in periodic layers, each containing a monomolecular layer of intercalated water, separated by crystalline assemblies of alkyl chains. The alkyl-chain organization shows a remarkable resemblance to that in highly organized, self-assembled monolayers formed from the precursor silane molecules on hydrophilic substrates and this parallel lends support to the critical importance of water in monolayer self-assembly of silanes.