催化作用
钯
化学
热重分析
解吸
聚苯乙烯
傅里叶变换红外光谱
红外光谱学
聚合物
核化学
吸附
无机化学
有机化学
化学工程
工程类
作者
Tusar Kanto Dey,Priyanka Basu,Sk Riyajuddin,Surajit Biswas,Aslam Khan,Kaushik Ghosh,Sk. Manirul Islam
标识
DOI:10.1002/slct.202002256
摘要
Abstract In this work, a functionalized chloromethylated polystyrene supported polymer complex of palladium was designed and synthesized in the three‐step process. The synthesized heterogeneous Pd(DAP‐DEAS‐MERF) catalyst was characterized by Field emission scanning electron microscopy, Energy dispersive analysis of X‐rays, Elemental mapping, Atomic absorption spectroscopy, N 2 ‐BET adsorption‐desorption isotherm, High‐resolution transmission electron microscopy, Thermogravimetric analysis‐Differential thermal analysis, Powder X‐Ray diffraction and Fourier‐transform infrared spectroscopy. The calculated surface area of the synthesized Pd(DAP‐DEAS‐MERF) catalyst is 4.018 m 2 /g and palladium content is found to be 5.16 % from AAS analysis. After this, the synthesized catalyst was successfully applied for the synthesis of aromatic esters and quinazoline‐2,4(1H,3H)‐diones in high efficiency. Aromatic esters were synthesized by the in‐situ carbonylative coupling reaction of iodobenzenes and phenols using chlorofirmand KOH as CO source.In the case of quinazoline‐2,4(1H,3H)‐diones synthesis, CO 2 fixation reaction was performed with 2‐iodoaniline derivatives and tert ‐butyl isocyanide/cyclohexyl isocyanide under atmospheric CO 2 pressure. The synthesized products were identified by 1 HNMR spectroscopy after purifying by coloum chromatography technique. In this report, Pd(DAP‐DEAS‐MERF) catalyst proved its efficiency by providing a comparatively better reaction condition than the other reported homogeneous and heterogeneous catalytic systems. Additionally, the catalyst isrecyclable up to six times and thermally stable up to 319 °C.
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