Thermally stable transparent sol-gel based active siloxane-oligomer materials with tunable high refractive index and dual reactive groups
Thermally stable transparent sol-gel based active siloxane-oligomer materials with tunable high refractive index and dual reactive groups
复制标题
具有可调高折射率和双反应基团的热稳定透明溶胶-凝胶基活性硅氧烷低聚物材料
DOI：
10.1039/c6ra13164f
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Yang, Huai
中科院分区：
文献类型：
--
作者：
Chen, Mei;Zhang, Guoyan;Yang, Huai
本文首次报道了通过非水解溶胶 - 凝胶缩合反应合成的一系列具有双反应性基团（Si - H和S - H）的高折射率新型活性有机硅低聚物（PMDM）。通过改变甲基二甲氧基硅烷（MDMS）和3 - 巯基丙基甲基二甲氧基硅烷（MMDS）之间的投料比，低聚硅氧烷的折射率可有效地从1.55提高到1.65。此外，通过“硫醇 - 烯”点击化学以及随后在铂催化剂作用下的硅氢加成反应，一种具有提高的折射率（1.59）和优异热稳定性（T - 5% = 381℃）的透明硅氧烷 - 聚合物薄膜被简便地合成并表征，这反过来有效地证实了PMDM中双反应性基团的反应活性。这种活性低聚物将是有用的化学中间体，并且这些易于加工的材料在现代光学/光子应用（如波导、激光器或发光二极管）中具有巨大潜力。
In this paper, a series of novel active silicone-oligomers (PMDM) of high refractive index (RI) with dual reactive moieties (Si-H and S-H) synthesized by nonhydrolytic sol-gel condensation are reported for the first time. The RI of the oligosiloxane can be effectively increased from 1.55 to 1.65 by varying the feed ratio between methyldimethoxysilane (MDMS) and 3-mercaptopropylmethyldimethoxysilane (MMDS). Additionally, via "thiol-ene" click chemistry and the subsequent hydrosilylation reaction under a Pt catalyst, a transparent siloxane-polymer film with enhanced refractive index (1.59) and excellent thermal stability (T-5% = 381 degrees C) was facilely synthesized and characterized, which in turn effectively substantiated the reactivity of the dual reactive moieties in PMDM. Such active oligomers would be useful chemical intermediates and the easily processed materials have great potential in modern optical/photonic applications such as waveguides, lasers or light emitting diodes.