首页|One-pot synthesis of bifunctional polyhedral oligomeric silsesquioxane: Full spectrum ratio of vinyl groups from 0 to 100%
One-pot synthesis of bifunctional polyhedral oligomeric silsesquioxane: Full spectrum ratio of vinyl groups from 0 to 100%
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Polyhedral oligomeric silsesquioxanes (POSSs) have received great attention owing to their structural stability and diverse external functional groups. The extensive development of synthetic strategies has yielded mono-and multi-functionalized POSSs. The synthesis of functionalized POSSs, however, generally requires complex reactions and tedious workup processes; therefore, it is difficult to meticulously control the structure of POSSs. To address this problem, we propose a novel straightforward and universal strategy to produce multifunctional POSSs with the desired number of vinyl groups. In brief, POSSs were built through cohydrolysis-cocondensation by employing methyltrimethoxysilane and vinyltrimethoxysilane (ViM-POSS) in a one-pot system. 1H NMR and X-ray photoelectron spectroscopy reveal that the stoichiometric ratio of the vinyl and methyl groups in ViM-POSSs is almost identical to the theoretical value. Moreover, all ViM-POSSs are synthesized as T-8 POSSs with rhombohedral structures in the R-3 space group and are stacked in the ABC sequence. Furthermore, as the portion of the vinyl group in ViM-POSSs increases from 0 to 100%, average molecular size, average molecular weight, and sublimation temperature of ViM-POSSs go up steadily. We therefore believe that this facile and effectual synthetic route will set a precedent for POSS synthesis in both academia and industry.
Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, lncheon 22212, Republic of Korea
NSTL
