Reported herein is a magnetically separable heterogeneous nano catalyst Fe₃O₄@SiO₂-biIMI- PtCl₂, which is prepared by firstly applying a SiO₂ coating onto readily synthesized magnetite nanoparticles via the hydrolysis condensation of tetraethyl orthosilicate (TEOS) under basic conditions, then modifying it using aminopropyl triethoxysilane and bis(imidazole) aldehyde, and finally incorporating a PtCl₂ complex via coordination chemistry. The chemical structure and morphology of the nanocatalyst as well as the valence state and content of platinum within this catalyst were carefully characterized. This catalyst can mediate the hydrosilylation between 1-octene and hydrosilane, with the conversion of 1-octene reaching up to 99%, and it shows good regioselectivity as only β-adducts are identified. In addition, this catalyst can be reused for at least 5 cycles. The hydrosilylation reaction between different olefins and hydrosilanes can also be efficiently mediated by Fe₃O₄@SiO₂-biIMI-PtCl₂.

本文报道的是一种磁性可分离的非均相纳米催化剂Fe ₃ O ₄ @SiO ₂ -biIMI- PtCl ₂，其通过首先在碱性条件下通过原硅酸四乙酯（TEOS）的水解缩合将SiO ₂涂层施加到易于合成的磁铁矿纳米颗粒上而制备。 ，然后使用氨丙基三乙氧基硅烷和双（咪唑）醛进行修饰，最后加入PtCl ₂通过配位化学而复杂。仔细表征了纳米催化剂的化学结构和形态以及该催化剂中的价态和铂的含量。该催化剂可介导1-辛烯与氢硅烷之间的氢化硅烷化，且1-辛烯的转化率高达99％，并且由于仅鉴定出β-加合物，因此显示出良好的区域选择性。另外，该催化剂可以重复使用至少5个循环。Fe ₃ O ₄ @SiO ₂ -biIMI-PtCl ₂还可有效地介导不同烯烃与氢硅烷之间的氢化硅烷化反应。