Preparation and structure of organic-inorganic hybrid precursors for new type low-melting glasses
Preparation and structure of organic-inorganic hybrid precursors for new type low-melting glasses
复制标题
DOI：
10.1016/s0022-3093(02)01188-2
复制
发表时间：
2002-09-01
影响因子：
3.5
通讯作者：
Yoko, T
中科院分区：
文献类型：
--
作者：
Niida, H;Takahashi, M;Yoko, T
采用非水酸碱反应法合成了不含Ph、F等污染元素的新型低熔玻璃的有机-无机杂化前驱体。杂化化合物由-Si-O-P-骨架组成，其中Si四面体的一些桥氧被有机官能团取代。通过有机官能团终止氧化物框架降低了网络尺寸。以正磷酸（H3 PO 4）和二烷基二氯硅烷（Me 2SiCl 2和Et 2SiCl 2）为起始原料。红外光谱证实了P-O-Si键的形成。在较高的Si浓度下，较大的粘度增加与连接的形成相关。提出了P-OH + Si-Cl-> P-O-Si + HCl的酸碱缩聚反应主导网络的形成。当二甲基硅烷SiMe 2被二价Sn取代时，可以得到SnO-Me 2 SiO-P 2 O 5系统的有机-无机杂化低熔玻璃，其玻璃化转变温度约为29 ℃。因此，本酸碱反应为新型低熔玻璃前驱体的合成提供了新的途径。(C)2002 Elsevier Science B. V.保留所有权利。
Organic-inorganic hybrid precursors for new type low-melting glasses without pollution elements such as Ph and F have been synthesized through a non-aqueous acid-base reaction process. The hybrid compounds consist of -Si-O-P-framework, in which some of the bridging oxygens of a Si tetrahedron are substituted by organic functional groups. Terminating the oxide framework by the organic functional groups lowers the network dimension. Orthophosphoric acid (H3PO4) and dialkyldichlorosilane (Me2SiCl2 and Et2SiCl2) were employed as starting materials. The formation of P-O-Si linkage was confirmed by IR spectra. The larger viscosity increase at higher Si concentrations is correlated to the formation of the linkage. It is proposed that an acid-base polycondensation reaction of P-OH + Si-CI --> P-O-Si + HCl up arrow dominates the network formation. When dimethylsilane SiMe2 is substituted by divalent Sn, an organic-inorganic hybrid low-melting glass in the system of SnO-Me2SiO-P2O5 can be derived, the glass transition temperature of which is about 29 degreesC. So the present acid-base reactions provide a new process by which precursors for new type low-melting glass are synthesized. (C) 2002 Elsevier Science B.V. All rights reserved.