Muang-Non Phonlakrit, Richardson Christopher, White Nicholas G
Research School of Chemistry, Australian National University, Canberra, 2600, ACT, Australia.
School of Chemistry and Molecular Bioscience, Faculty of Science Medicine and Health, University of Wollongong, Wollongong, 2520, NSW, Australia.
Angew Chem Int Ed Engl. 2023 Feb 13;62(8):e202212962. doi: 10.1002/anie.202212962. Epub 2023 Jan 19.
In a recent Research Article, Ben and co-workers reported a hydrogen-bonded framework prepared from a 4 tetra-amidinium component and a 4 tetra-sulfonate component, termed CPOS-6. They showed that CPOS-6 could reversibly adsorb and desorb water over a narrow humidity window, and that this material offered potential for applications in atmospheric water harvesting. This conclusion was supported by experiments that showed the material was stable over 50 adsorption/desorption cycles and that the kinetics of these cycles were very rapid. In this Correspondence we present additional structural data regarding this framework in both its hydrated and dehydrated states and thus discern the mechanism of water binding. These data do not disagree with Ben and co-workers' findings: rather they emphasise how remarkable the cyclability and rapid kinetics of adsorption/desorption are, as these processes involve a complete crystal-to-crystal rearrangement of the framework.
在最近的一篇研究论文中，本及其同事报道了一种由四脒基组分和四磺酸根组分制备的氢键框架结构，称为CPOS-6。他们表明，CPOS-6能够在狭窄的湿度范围内可逆地吸附和解吸水，并且这种材料在大气水收集方面具有应用潜力。实验支持了这一结论，实验表明该材料在50次吸附/解吸循环中稳定，并且这些循环的动力学非常迅速。在这篇通讯文章中，我们给出了该框架结构在水合和脱水状态下的更多结构数据，从而识别水结合的机制。这些数据与本及其同事的发现并不矛盾：相反，它们强调了吸附/解吸的循环性和快速动力学是多么显著，因为这些过程涉及框架结构从晶体到晶体的完全重排。
