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近年来,对高分子金属催化剂的研究十分活跃,以期开发活性高,选择性强,稳定性好,易于分离回收并兼具均相和非均相两类催化剂优点的高分子金属络合物催化剂,然而对其结构的研究报道甚少。 本文用X-射线光电子能谱(XPS)研究了聚-r-巯|丙基硅氧烷-铂络合物催化剂(简称Pt-催化剂),证实了这种催化剂是络合物,确定了聚-r-巯丙基硅氧烷(简称载体)与H_2PtCl_6间的络合位置,从而提出了这一络合物催化剂的可能结构。通过对失活Pt-催化剂的研究,探明了其失活机理,且与低分子H_2PtCl_6催化剂的失活原因相同。
In recent years, the study of polymer metal catalysts is very active, in order to develop high activity, selectivity, stability, and easy separation and recovery of both homogeneous and heterogeneous catalysts of the advantages of two kinds of polymer metal complex catalysts However, little research has been done on its structure. In this paper, poly-r-mercaptopropylsiloxane-platinum complex catalyst (Pt-catalyst for short) was studied by X-ray photoelectron spectroscopy (XPS), confirming that this catalyst is a complex, -r-mercaptopropyl siloxane (referred to as carrier) and H_2PtCl_6 complex between the positions, thus proposed the possible structure of this complex catalyst. The deactivation mechanism was proved by the investigation of the inactivated Pt-catalyst, which was the same as the deactivation of the low-molecular-weight H 2 PtCl 6 catalyst.