100% thiol-functionalized ethylene PMOs prepared by “thiol acid–ene” chemistry
作者:Dolores Esquivel、Otto van den Berg、Francisco J. Romero-Salguero、Filip Du Prez、Pascal Van Der Voort
DOI:10.1039/c3cc39074h
日期:——
A novel thiol functionalized bis-silane PMO precursor was synthesized by highly efficient thiol acidâene chemistry between the double bonds of 1,2-(E)-bis(triethoxysilyl)ethene and thioacetic acid. After aminolysis the self-assembly process of the formed SH-precursor with Pluronic P123 under acidic conditions yields the first 100% thiolâPMO material with good structural ordering.
Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO
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Insertion
作者:Mahdieh Haghighat、Karen Leus、Farhad Shirini、Pascal Van Der Voort
DOI:10.1002/asia.202100524
日期:2021.8.2
We clicked a salen ligand onto a thiol-ethane bridged periodicmesoporousorganosilica (Salen-PMO) using a photo-initiated thiol-ene clickreaction. This process resulted in a covalently bonded salen ligand on the PMO material. The final BET surface area amounts 511 m2/g and the pore size diameter is approximately 7 nm. The functionalized PMO material showed an excellent carbon dioxide uptake capacity
我们使用光引发的硫醇-烯点击反应将 salen 配体点击到硫醇-乙烷桥连的周期性介孔有机硅 (Salen-PMO) 上。该过程在 PMO 材料上产生了共价键合的 salen 配体。最终的 BET 表面积为 511 m 2 /g,孔径直径约为 7 nm。功能化的 PMO 材料在 273 K 和 1 bar 下表现出优异的二氧化碳吸收能力,为 1.29 mmol/g。更重要的是,通过协调一个 MoO 2 2+络合物到Salen-PMO材料上,我们获得了一种对环己烯环氧化具有良好催化性能的多相催化剂。该催化剂具有高度可重复使用性,因为在至少四次运行中未观察到其活性降低(转化率为 99%)。最后,不含金属的Salen-PMO在CO 2环加成成环氧化物时表现出优异的催化性能。获得的结果清楚地证明了 Salen-PMO 材料的多功能性,不仅可以作为无金属催化剂,而且可以作为固定金属配合物用于特定催化应