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A {Ni12}-Wheel-Based Metal-Organic Framework for Coordinative Binding of Sulphur Dioxide and Nitrogen Dioxide
2021-11-30 15:40

英国曼彻斯特大学Sihai Yang团队开发了用于二氧化硫和二氧化氮协同结合的{Ni12}-轮基金属有机框架。相关研究成果发表在2021年11月29日出版的《德国应用化学》。

SO2和NO2造成的空气污染对环境和人类健康造成了重大危害。了解捕获材料中活性位点的机制对于开发新的清理技术具有根本重要性。

该文中,研究人员报道了SO2和NO2在金属有机骨架(NKU-100)中开放Ni(II)位点上可逆配位结合的晶体学观察,该骨架结合了前所未有的{Ni 12}轮,在去溶剂化过程中显示了六个开放Ni(II)位点。固定气体分子通过氢键、π··π相互作用和偶极相互作用组成的主-客体相互作用进一步稳定。在298K和1.0bar下,NKU-100对SO2和NO2的吸附量分别为6.21和5.80mmol g-1。动态突破实验证实了在干燥条件下,在低浓度下选择性保留SO2和NO2

研究工作将为未来设计捕获SO2和NO的高效吸附剂提供启发。

附:英文原文

Title: A {Ni12}-Wheel-Based Metal-Organic Framework for Coordinative Binding of Sulphur Dioxide and Nitrogen Dioxide

Author: Sihai Yang, Zongsu Han, Jiangnan Li, Wanpeng Lu, Kunyun Wang, Yinlin Chern, Xiaoping Zhang, Longfei Lin, Xue Han, Simon Teat, Mark Frogley, Wei Shi, Peng Cheng

Issue&Volume: 2021-11-29

Abstract: Air pollutions by SO  2  and NO  2  have caused significant risks on the environment and human health. Understanding the mechanism of active sites within capture materials is of fundamental importance to the development of new clean-up technologies. Here we report the crystallographic observation of reversible coordinative binding of SO  2  and NO  2  on open Ni(II) sites in a metal-organic framework (NKU-100) incorporating an unprecedented {Ni  12  }-wheel, which exhibits six open Ni(II) sites on desolvation. Immobilised gas molecules are further stabilised by cooperative  host-guest interactions  comprised of hydrogen bonds, π  ···  π interactions and dipole interactions. At 298 K and 1.0 bar, NKU-100 shows adsorption uptakes of 6.21 and 5.80 mmol g  -1  for SO  2  and NO  2  , respectively. Dynamic breakthrough experiments have confirmed the selective retention of SO  2  and NO  2  at low concentrations under dry conditions. This work will inspire the future design of efficient sorbents for the capture of SO  2  and NO  2  .

DOI: 10.1002/anie.202115585

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202115585

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