通过微滴合成Cu-Trimesic acid / Cu-1,4-Benzenedioic acid：组分组成的作用,Crystal Growth & Design

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通过微滴合成Cu-Trimesic acid / Cu-1,4-Benzenedioic acid：组分组成的作用
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-12-21 00:00:00 , DOI: 10.1021/acs.cgd.8b01606
Xiang He ₁ , Wei-Ning Wang ₁

Affiliation

混合连接的金属有机骨架（MOF）在孔结构和表面化学方面都提供了很好的可调性。这项研究报告了通过基于微滴的喷雾工艺合成和表征模型混合接头MOF（即Cu-TMA / Cu-BDC； BDC = 1,4-苯二酸，TMA =偏苯三酸），以阐明这种关系混合连接基MOF的性能与组分组成之间的关系。所制备的混合接头MOF在形态，结晶相，表面化学和孔结构方面表现出独特的性能。特别地，进行了二维相关光谱（2D-COS）分析以分析表面官能团之间的相关特征，这是传统红外光谱和拉曼光谱无法实现的。2D-COS分析的结果还表明，可通过控制前体条件来调节混合接头MOF的表面化学性质。一氧化碳的测量₂在混合接头MOF上的吸附证明了优先吸附位和吸附动力学的可调性。所有上述信息都暗示可以更改合成参数以优化混合连接器MOF的性能。这项研究的结果为基于微滴的喷涂过程中混合连接基MOF的合成化学提供了新的见解。

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Synthesis of Cu-Trimesic Acid/Cu-1,4-Benzenedioic Acid via Microdroplets: Role of Component Compositions

Mixed-linker metal–organic frameworks (MOFs) offer great tunability in both pore structures and surface chemistry. This study reports the synthesis and characterization of model mixed-linker MOFs (i.e., Cu-TMA/Cu-BDC; BDC = 1,4-benzenedioic acid, TMA = trimesic acid) via a microdroplet-based spray process, to unravel the relationship between the properties of mixed-linker MOFs and the component compositions. The as-prepared mixed-linker MOFs exhibited distinct properties in terms of morphology, crystalline phase, surface chemistry, and pore structure. In particular, two-dimensional correlation spectroscopy (2D-COS) analysis was conducted to analyze the correlational features among surface functional groups, which are unattainable from traditional infrared and Raman spectra. The results from the 2D-COS analysis also suggest that the surface chemistry of the mixed-linker MOFs is adjustable by controlling the precursor conditions. Measurements of CO₂ adsorption on the mixed-linker MOFs demonstrated the tunability of the preferential adsorption sites and adsorption kinetics. All the above-mentioned information implies that synthetic parameters can be varied to optimize the performance of the mixed-linker MOFs. The outcome of this study offers new insights into the synthetic chemistry of mixed-linker MOFs in a microdroplet-based spray process.

更新日期：2018-12-21

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