Recently CO₂ fixation has gained large extent attention due to its potential applications as an abundant C1 resource and variety of value-based fine chemicals that can be synthesized through this fixation. In this paper copper nanoparticles incorporated covalent organic framework based (Cu-NPs@COF) material was synthesized by a simple in-situ process. The material was characterized by various instrumental techniques such as FTIR spectra, PXRD, UV–vis spectra, HR-TEM, XPS, N₂ adsorption desorption, TG-DTA, AAS analysis, etc. The material is potentially very active catalyst in fixation of carbon dioxide to synthesize 2-oxazolidinones as well as benzimidazoles. 2-oxazolidinones was prepared from propergylamine in presence of 1,8-Diazabicyclo(5.4.0)undec-7-ene (DBU) base at 50 °C under 1 bar CO₂ pressure in acetonitrile solvent medium and the desired product was obtained up to 96 % yield after 12 h of reaction. Again the catalyst can fix CO₂ (1 bar pressure) in o-phenylenediamine/its derivatives to produce benzimidazoles with moderate to an excellent yield of the desired product in presence of environmentally benign hydrogen source dimethylamine borane (DMAB) under green solvent mixture (ethanol/water). Furthermore, the catalyst is very easily recyclable and reusable without considerable loss of active site copper metal for many catalytic cycles (up to six cycles was tested).

最近，由于其作为丰富的C1资源和可以通过这种固定合成的多种基于价值的精细化学品的潜在应用，CO ₂固定得到了广泛的关注。在本文中，通过简单的原位合成方法合成了掺有共价有机骨架的铜纳米粒子（Cu-NPs @ COF）材料。通过多种仪器技术对材料进行了表征，例如FTIR光谱，PXRD，UV-vis光谱，HR-TEM，XPS，N ₂吸附解吸，TG-DTA，AAS分析等。该材料在固定二氧化碳以合成2-恶唑烷酮和苯并咪唑方面可能是非常活跃的催化剂。在1,8-二氮杂双环（5.4.0）十一烷基-7-烯（DBU）碱的存在下，在50°C，1 bar CO ₂压力下，在乙腈溶剂介质中，由炔丙基胺制备2-恶唑烷酮。反应12小时后产率达到96％。再次，催化剂可以固定CO ₂（1巴压力）Ô-苯二胺/它的衍生物，在绿色溶剂混合物（乙醇/水）下，在环境友好的氢源二甲胺硼烷（DMAB）存在下，以中等至极好的所需产物收率生产苯并咪唑。此外，该催化剂非常容易回收利用，并且在许多催化循环中（在测试中最多进行了六个循环）活性位点铜金属没有明显损失。