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通过连接物修饰调整以异构酸盐为基础的金属有机框架的吸附特性

Valentina Colombo¹, Carmen Montoro, Angelo Maspero

¹Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, Como, Italy. valentina.colombo@uninsubria.it

Journal of the American Chemical Society

|July 7, 2012

概括

具有功能化的链接器的新金属有机框架 (MOF) 对具有不同极性的分子显示了改善的气体分离. 这些以Pyrazolate为基础的MOF在选择性吸附应用中具有灵活性和热稳定性.

科学领域:

材料科学材料科学材料科学
化学化学化学
化学工程是化学工程的重要组成部分.

背景情况:

金属有机框架 (MOF) 为气体分离提供可调节的多孔结构.
异构序列允许对MOF属性的系统修改.
连接器的功能化可以影响吸附选择性.

研究的目的:

合成和描述新的基于pyrazolate的3DMOFs (MBDP_X) 与标记的有机链接器.
研究这些MOF的结构,热和灵活性特性.
评估它们在选择性气体吸附和分离中的性能.

主要方法:

使用功能化链接器 (H(2) 合成基于pyrazolate的MOF (BDP_X).
使用红外光谱,X射线粉末衍射 (XRPD) 和同时TG/DSC (STA) 的表征.
吸附性研究包括单元异温,脉冲气相色谱和突破曲线测量.

主要成果:

顺利合成具有 -NO(2), -NH(2) 和 -OH 标签的异构型MBDP_X 系列.
证明了热稳定性和灵活性,并观察到客人诱导的适应行为.
功能化并没有提高具有相似四极时刻的气体的选择性 (例如,CO2 / C2H2).
对于极性高度差异化的混合物 (例如,N(2) / CO(2),CH(4) / CO(2) 的气体分辨率显著改善.

结论:

合成的基于pyrazolate的MOFs在气体分离方面表现出有前途的特性.
被标记的链接器增强了对具有不同极性的气体的选择性,这对于N2 / CO2和CH4 / CO2分离等应用至关重要.
这些材料表明了气体净化和分离技术的潜力.

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