Gas Conversion Department, Faculty of Petrochemicals, Iran Polymer and Petrochemicals Institute, PO Box 14975-112, Tehran, Iran.
Department of Chemistry, School of Science, Alzahra University, PO Box 1993891176, Vanak, Tehran, Iran.
Carbohydr Polym. 2018 Nov 15;200:183-190. doi: 10.1016/j.carbpol.2018.07.093. Epub 2018 Jul 31.
Taking advantage of biocompatible chitosan (CS), halloysite (Hal) and ionic liquid (IL), a triple hybrid system, Hal-CS-SFIL was designed and prepared via covalent bonding of Cl-functionalized Hal and CS-SFIL. The hybrid system was successfully utilized as a heterogeneous catalyst support for immobilizing Pd nanoparticles. The resulting hybrid catalyst, Pd@Hal-CS-SFIL was used as a heterogeneous catalyst for catalyzing Sonogashira reaction under mild reaction condition. The results showed that this catalyst was efficient. Studying the recyclability of the catalyst confirmed that the catalyst could be recycled for seven reaction runs with slight loss of the catalytic activity and Pd leaching. The role of each hybrid component in the catalysis was confirmed by comparing the catalytic activity of Pd@Hal, Pd@CS, Pd@Hal-CS and Pd@Hal-CS-SFIL. Moreover, the synergism between the components was established by observing the superior catalytic activity of the catalyst with those of Pd@Hal-CS + SFIL, Pd@CS-SFIL+Hal and Pd@Hal + CS-SFIL.
利用生物相容性壳聚糖 (CS)、海泡石 (Hal) 和离子液体 (IL)，通过 Cl 功能化 Hal 与 CS-SFIL 的共价键合，设计并制备了三重混合体系 Hal-CS-SFIL。该混合体系成功用作固定化 Pd 纳米粒子的多相催化剂载体。所得混合催化剂 Pd@Hal-CS-SFIL 用作温和反应条件下 Sonogashira 反应的多相催化剂。结果表明，该催化剂具有高效性。研究催化剂的可回收性证实，该催化剂可在七个反应循环中回收，催化活性和 Pd 浸出略有损失。通过比较 Pd@Hal、Pd@CS、Pd@Hal-CS 和 Pd@Hal-CS-SFIL 的催化活性，确认了每个混合组分在催化中的作用。此外，通过观察催化剂与 Pd@Hal-CS+SFIL、Pd@CS-SFIL+Hal 和 Pd@Hal+CS-SFIL 的协同作用，证实了组分之间的协同作用。
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