Palladium nanoparticles<i>in situ</i>synthesized on<i>Cyclea barbata</i>pectin as a heterogeneous catalyst for Heck coupling in water, the reduction of nitrophenols and alkynes
作者:Van-Dung Le、T. Cam-Huong Le、Van-Trung Chau、T. Ngoc-Duyen Le、Chi-Hien Dang、T. To-Nguyen Vo、Trinh Duy Nguyen、Thanh-Danh Nguyen
DOI:10.1039/d0nj05032f
日期:——
used as a catalyst for the conversion of alkynes into cis-alkenes with KOH/DMF as a hydrogenation source. The reaction was also utilized effectively for the synthesis of sex pheromones, including Plutella xylostella ((Z)-11-hexadecen-1-yl acetate) and Cylas formicarius ((Z)-3-dodecen-1-yl(E)-2-butenoate) with the total yields of 70% and 68%, respectively. Therefore, PdNPs supported on C. barbata pectin
这项研究开发了一种有效的方法,以Cycla barbata果胶为绿色还原和稳定剂原位合成钯纳米粒子(PdNP)。PdNP @果胶纳米复合材料已通过分析技术(如紫外可见,FTIR,EDX,XRD,SEM,HR-TEM和STEM映射)得到了很好的表征。发现晶体PdNP的分布范围为1–25 nm,最高频率为6–12 nm。PdNP @果胶对水介质中的Heck偶联反应表现出优异的可回收催化活性。研究了纳米粒子的动力学和可循环性,以催化还原o-,m-和p。-硝基苯酚。结果显示出良好的催化效率,并成功进行了5次循环,且收效不大。特别地,该纳米复合材料被用作催化剂,以KOH / DMF作为氢化源,将炔烃转化为顺式烯烃。该反应也被有效地用于性信息素的合成,包括小菜蛾(Plutella xylostella)((Z)-11-十六碳烯-1-基乙酸酯)和Cylas formicarius((Z)-3-十二碳烯-1-基(E)-2)。