超稳定的高连接金属有机框架
Huajun Yang1,2, Fang Peng1, Anh N Hong2
1Department of Chemistry and Biochemistry, California State University, Long Beach, California 90840, United States.
Journal of the American Chemical Society
|August 31, 2021
概括
新的基于的金属有机框架 (Cr-MOF) 在极端的pH范围0到14表现出前所未有的化学稳定性. 这些强大的Cr-MOF为先进材料应用提供了巨大的潜力.
科学领域:
- 材料科学
- 无机化学
- 纳米技术
背景情况:
- 金属有机框架 (MOF) 通常表现出有限的化学稳定性,特别是在极端的pH条件下.
- 现有的MOF通常在pH值<0或pH值>14下降解,从而限制了它们的实际应用.
- 基于的MOF (Cr-MOF) 是有前途的,但需要增强稳定性.
研究的目的:
- 在广泛的pH范围内开发出具有特殊化学稳定的新型Cr-MOF.
- 研究这些新型Cr-MOF增强稳定性的因素.
- 探索这些稳定的Cr-MOF在未来应用中的潜力.
主要方法:
- 合成具有特殊增强稳定性的新型Cr-MOF.
- 使用粉末X射线衍射 (PXRD) 进行化学稳定性的表征.
- 通过气体吸附测量评估结构完整性和多孔性.
主要成果:
- 新合成的Cr-MOF在约16个pH单位 (pH<0到pH>14) 中表现出显著的稳定性.
- 稳定性归因于非标记性Cr3+,混合Cr-N和Cr-O交叉链,以及Cr3O剪裁器.
- 与之前报告的Cr-MOF相比,这些Cr-MOF具有更高的基稳定性.
- 在已知的阴离子MOF中,其化学稳定性无与伦比.
结论:
- 开发的Cr-MOF代表了MOF化学稳定性的重大进步.
- 它们的非凡的pH耐受性使得Cr-MOF在苛刻的应用中重新获得活力.
- 这些材料为开发具有可调性属性的功能化MOF提供了一个平台.
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