Siddig Lamia A, Alzard Reem H, Abdelhamid Abdalla S, Ramachandran Tholkappiyan, Nguyen Ha L, Paz Alejandro Perez, Alzamly Ahmed
Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 15551, UAE.
Department of Chemical Engineering, UAE University, P.O. Box 15551, Al-Ain 15551, UAE.
Inorg Chem. 2023 Sep 25;62(38):15550-15564. doi: 10.1021/acs.inorgchem.3c02051. Epub 2023 Sep 12.
A novel cobalt hydrogen-bonded organic framework (Co-HOF, CHCoNO) was synthesized from a mixed linker, that is, 2,5-pyridinedicarboxylic acid (PDC) and 2,2'-bipyridyl (BPY) linkers and cobalt ion through a simple, one-pot, low-cost, and scalable solvothermal method. The Co-HOF was fully characterized using several analytical and spectroscopic techniques including single-crystal X-ray diffraction, diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray, and X-ray photoelectron spectroscopy. The Co-HOF exhibits high thermal and chemical stabilities compared to previously reported HOF materials. Moreover, Co-HOF shows excellent photocatalytic activity under visible light irradiation due to its narrow band gap of 2.05 eV. The cycloaddition reaction of CO to variable epoxides was investigated to evaluate the photocatalytic performance of Co-HOF under visible light radiation and was found to produce the corresponding cyclic carbonates in yields up to 99.9%.
通过一种简单、一锅法、低成本且可扩展的溶剂热法，由混合连接体（即2,5-吡啶二甲酸（PDC）和2,2'-联吡啶（BPY）连接体）与钴离子合成了一种新型钴氢键有机框架（Co-HOF，CHCoNO）。使用多种分析和光谱技术对Co-HOF进行了全面表征，包括单晶X射线衍射、漫反射光谱、傅里叶变换红外光谱、扫描电子显微镜、能量色散X射线和X射线光电子能谱。与先前报道的HOF材料相比，Co-HOF具有较高的热稳定性和化学稳定性。此外，由于其2.05 eV的窄带隙，Co-HOF在可见光照射下表现出优异的光催化活性。研究了CO与各种环氧化物的环加成反应，以评估Co-HOF在可见光辐射下的光催化性能，发现其能以高达99.9%的产率生成相应的环状碳酸酯。
