Green Synthesized AgNPs Embedded in COF: An Efficient Catalyst for the Synthesis of 2‐Oxazolidinones and α‐Alkylidene Cyclic Carbonates via CO2 Fixation,ChemNanoMat

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Green Synthesized AgNPs Embedded in COF: An Efficient Catalyst for the Synthesis of 2‐Oxazolidinones and α‐Alkylidene Cyclic Carbonates via CO2 Fixation
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-07-15 , DOI: 10.1002/cnma.202000284
Sk. Safikul Islam _{1,

2} , Surajit Biswas ₁ , Rostam Ali Molla ₃ , Nasima Yasmin ₂ , Sk. Manirul Islam ₁

Affiliation

The synthesis of important organic chemicals through sustainable and green methods is always demanding for the scientific community. Fixation of carbon dioxide for this purpose is very attractive as CO₂ is non‐toxic, easily available, naturally abundant, recyclable, non‐flammable and an inexpensive C1 resource, and also the concentration of CO₂ (most responsible greenhouse gas) is reduced. This article demonstrates the synthesis of silver nanoparticles (AgNPs) by an eco‐friendly method and incorporation of the particles into a covalent organic framework in order to obtain a sustainable heterogeneous catalyst, AgN@COF. The catalyst has been characterized in detail by FT‐IR,UV‐Vis. spectroscopy, FE‐SEM, TEM, EDAX, XPS, PXRD, ICP‐AES, TG‐DTA and N₂ absorption‐desorption studies. The synthesized catalyst is able to fix CO₂ to terminal propargylic amine and propargylic alcohol for the production of 2‐oxazolidinones and α‐alkylidene cyclic carbonates, respectively, through two different catalytic pathways. In both catalytic protocols, one atmospheric carbon dioxide was used. Production of α‐alkylidene cyclic carbonates occurred at room temperature and solvent‐free condition, and 2‐oxazolidinones were obtained under mild reaction conditions. Moreover, the catalyst is recyclable and reusable. Its catalytic efficacy was preserved even after the use of six consecutive catalytic cycles.

中文翻译：

嵌入COF的绿色合成AgNP：通过CO2固定合成2-恶唑烷酮和α-亚烷基环状碳酸酯的高效催化剂

通过可持续和绿色方法合成重要的有机化学品一直是科学界的要求。为此目的固定二氧化碳非常有吸引力，因为CO ₂无毒，易获得，自然丰富，可回收，不可燃且是廉价的C1资源，并且降低了CO ₂（最负责任的温室气体）的浓度。本文演示了通过生态友好的方法合成银纳米颗粒（AgNPs）并将其掺入共价有机骨架中以获得可持续的非均相催化剂AgN @ COF。FT-IR，UV-Vis对催化剂进行了详细表征。光谱，FE‐SEM，TEM，EDAX，XPS，PXRD，ICP‐AES，TG‐DTA和N ₂吸收-解吸研究。合成的催化剂能够通过两种不同的催化途径将CO ₂固定在末端炔丙基胺和炔丙基醇上，分别生产2-恶唑烷酮和α-亚烷基环状碳酸酯。在两种催化方案中，均使用一种大气二氧化碳。生产α -亚烷基的环状碳酸酯发生在室温和无溶剂条件下，并在温和的反应条件下获得-2-恶唑烷酮。而且，该催化剂是可回收的和可重复使用的。即使使用了六个连续的催化循环，其催化功效也得以保留。

更新日期：2020-07-15

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