Ultrasonic and bio-assisted synthesis of Ag@HNTs-T as a novel heterogeneous catalyst for the green synthesis of propargylamines: A combination of experimental and computational study 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Applied Organometallic Chemistry
年/卷/期
2018 / 32 / 4
页码
4291-1-4291-16
ISSN号
0268-2605
作者单位
Alzahra Univ, Sch Sci, Dept Chem, POB 1993891176 Vanak, Tehran, Iran;Alzahra Univ, Sch Sci, Dept Chem, POB 1993891176 Vanak, Tehran, Iran;Iran Polymer & Petrochem Inst, Fac Petrochem, Gas Convers Dept, POB 14975-112, Tehran, Iran;Alzahra Univ, Sch Sci, Dept Chem, POB 1993891176 Vanak, Tehran, Iran;
作者
Malmir, Masoumeh;Heravi, Majid M.;Sadjadi, Samahe;Hosseinnejad, Tayebeh;
摘要
A novel heterogeneous catalyst is prepared through functionalization of halloysite nanotube with 1H-1,2,3-triazole-5-methanol and subsequent immobilization of silver nanoparticles through bio-assisted approach using Arctiumplatylepis extract. The resulting catalyst, Ag@HNTs-T, was characterized by using SEM/EDX, BET, XRD, FTIR, ICP-AES, TGA, DTGA and elemental mapping analysis. Moreover, we computationally assessed metal-ligand interactions in Ag@HNTs-T complex model to interpret the immobilization behavior of silver nanoparticles on HNTs surface via quantum chemistry computations. The catalytic activity of the catalyst was studied for the synthesis of propargylamines via A(3) and KA(2) coupling reactions under ultrasonic irradiation. The results demonstrated that Ag@HNTs-T could efficiently promote these reactions to furnish the corresponding products in high yields and short reaction times. The study of the recyclability of the catalyst and Ag(0) leaching confirmed that the catalyst was recyclability up to four reaction runs with slight Ag(0) leaching.
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关键词/主题词
A(3) and KA(2) coupling reactions;bio-synthesis;DFT and PCM calculations;halloysite;silver nanoparticles;
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