Deriabin Konstantin V, Lobanovskaia Ekaterina K, Novikov Alexander S, Islamova Regina M
Saint Petersburg State University, 7/9, Universitetskaya nab., Saint Petersburg, 199034, Russia.
Org Biomol Chem. 2019 Jun 5;17(22):5545-5549. doi: 10.1039/c9ob00791a.
The platinum-catalyzed self-cross-linking of polymethylhydrosiloxane at RT in air was performed for the first time and proved by 1H, 13C, and 29Si SSNMR and swelling measurements. Quantum chemical modeling of possible structures was investigated. Platinum (0) and (ii) complexes were used as catalysts between the Si-H groups of polymethylhydrosiloxane. Karstedt's catalyst leads to Si-O-Si and Si-Si bond formation, but cis-[PtCl2(BnCN)2] generates predominantly Si-O-Si cross-links. cis-[PtCl2(BnCN)2] allows creating high-quality silicone rubbers without visible mechanical defects. This cross-linking approach can be used to obtain new Si-H-containing silicone materials.
首次在室温空气中进行了铂催化聚甲基氢硅氧烷的自交联反应，并通过¹H、¹³C和²⁹Si固体核磁共振以及溶胀测量进行了证明。研究了可能结构的量子化学建模。铂（0）和（II）配合物被用作聚甲基氢硅氧烷中Si-H基团之间的催化剂。卡尔斯特德催化剂导致Si-O-Si和Si-Si键的形成，但顺式-[PtCl₂(BnCN)₂]主要生成Si-O-Si交联键。顺式-[PtCl₂(BnCN)₂]能够制备出无明显机械缺陷的高质量硅橡胶。这种交联方法可用于获得新型含Si-H的有机硅材料。
