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首页> 外文期刊>Chemistry: A European journal >Silsesquioxane-Based Homogeneous and Heterogeneous Epoxidation Catalysts Developed by Using High-Speed Experimentation
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Silsesquioxane-Based Homogeneous and Heterogeneous Epoxidation Catalysts Developed by Using High-Speed Experimentation

机译：倍半硅氧烷开发的基于倍半硅氧烷的均相和均相环氧化催化剂

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摘要

A set of new titanium-silsesquioxane epoxidation catalysts was discovered by exploring the hydrolytic condensation of a series of trichlorosilanes in highly polar solvents by means of high-speed experimentation techniques. The most promising silsesquioxane leads were prepared on a conventional laboratory scale and fully characterised. The lead generated by the hydrolytic condensation of tBuSiCl_3 in DMSO consisted of a set of incompletely condensed silsesquioxane structures, whereas that obtained from the hydrolytic condensation of tBuSiQ_3 in water consisted of a single silsesquioxane structure, tBu_2Si_2O(OH)_4. This is the first reported example of the use of this silsesquioxane as a precursor for active Ti catalysts. The Ti complexes prepared with tBu_2Si_2O(OH)_4 were supported on silica to produce active heterogeneous epoxidation catalysts.
机译：通过利用高速实验技术研究一系列三氯硅烷在高极性溶剂中的水解缩合反应，发现了一套新型的钛-倍半硅氧烷环氧化催化剂。最有希望的倍半硅氧烷导线是按常规实验室规模制备的，并具有完整的特性。 tBuSiCl_3在DMSO中的水解缩合产生的铅由一组不完全缩合的倍半硅氧烷结构组成，而tBuSiQ_3在水中的水解缩合得到的铅由单一倍半硅氧烷结构tBu_2Si_2O（OH）_4组成。这是首次报道使用倍半硅氧烷作为活性Ti催化剂的前体。用tBu_2Si_2O（OH）_4制备的Ti络合物负载在二氧化硅上，制备出活性多相环氧化催化剂。

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