Au NPs fabricated on biguanidine-modified Zr-UiO-66 MOFs: a competent reusable heterogeneous nanocatalyst in the green synthesis of propargylamines,New Journal of Chemistry

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Au NPs fabricated on biguanidine-modified Zr-UiO-66 MOFs: a competent reusable heterogeneous nanocatalyst in the green synthesis of propargylamines
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2022-01-21 , DOI: 10.1039/d1nj02827h
Hojat Veisi ₁ , Marzieh Sayadi ₁ , Neko Morakabati ₁ , Taiebeh Tamoradi ₂ , Bikash Karmakar ₃

Affiliation

In this study, we utilized functionalized metal organic frameworks (MOFs) as a host matrix to embed gold (Au) nanoparticles. The three-dimensional Zr-based metal–organic framework UiO-66-NH₂ was functionalized with the biguanidine moiety using a post-synthetic modification (PSM) strategy, and then gold salt was successfully immobilized onto the surface of the biguanidine-functionalized Zr-MOF. The morphological and physicochemical features of the material were determined using several advanced techniques like FT-IR spectroscopy, SEM, TEM, EDX spectroscopy, elemental mapping, XRD and ICP-OES. The SEM, BET and XRD results showed that the morphology and structure of the Zr-MOF were retained after multiple transformations. The obtained UiO-66-bigua/Au nanocomposite exhibited excellent activity in the three-component reaction of aldehydes, amines and alkynes (A³ coupling) with good to high yields of diverse propargylamines. Furthermore, the catalyst could be recovered and reused 8 times with no significant reduction in its activity.

中文翻译：

在双胍修饰的 Zr-UiO-66 MOFs 上制造的 Au NPs：一种可重复使用的多相纳米催化剂，可用于炔丙基胺的绿色合成

在这项研究中，我们利用功能化金属有机框架 (MOF) 作为主体基质来嵌入金 (Au) 纳米颗粒。三维 Zr 基金属有机骨架 UiO-66-NH ₂使用合成后修饰（PSM）策略用双胍部分功能化，然后金盐成功地固定在双胍功能化的Zr-MOF的表面上。材料的形态和物理化学特征是使用多种先进技术确定的，例如 FT-IR 光谱、SEM、TEM、EDX 光谱、元素映射、XRD 和 ICP-OES。SEM、BET 和 XRD 结果表明，Zr-MOF 的形貌和结构在多次转变后得以保留。得到的 UiO-66-bigua/Au 纳米复合材料在醛、胺和炔烃的三组分反应中表现出优异的活性（A ³偶联）具有良好至高产率的多种炔丙基胺。此外，催化剂可以回收和重复使用 8 次，而其活性没有显着降低。

更新日期：2022-01-21

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