A flexible metal–organic framework with adaptive pores for high column-capacity gas chromatographic separation†,Inorganic Chemistry Frontiers

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A flexible metal–organic framework with adaptive pores for high column-capacity gas chromatographic separation†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-08-29 00:00:00 , DOI: 10.1039/c8qi00684a
Chun-Ting He _{1,

2,

3,

4,

5} , Zi-Ming Ye _{1,

2,

3,

4,

5} , Yan-Tong Xu _{1,

2,

3,

4,

5} , Yi Xie _{1,

2,

3,

4,

5} , Xin-Lu Lian _{1,

2,

3,

4,

5} , Jie-Peng Zhang _{1,

2,

3,

4,

5} , Xiao-Ming Chen _{1,

2,

3,

4,

5}

Affiliation

Solvothermal reaction of Zn(NO₃)₂ and a bifunctional ligand 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H₂mpba) using benzene as template gave a two-fold interpenetrated porous framework [Zn₂(Hmpba)₂(mpba)]·2C₆H₆ (1·C₆H₆ or MCF-54), which displayed single-crystal to single-crystal (SCSC) structural transformations upon activation and adsorption of methanol, toluene and cyclohexane. Single-crystal structural analysis and computational simulations demonstrated that compound 1 possesses adaptive pores toward various shapes or arrangements of guests. Using silicone rubber as binder, microcrystalline powders of 1 were coated on the inner surface of a capillary column for gas chromatography, which displayed high separation performances and/or abnormal separation sequences for similar benzene homologues. By virtue of the large loading amount of adsorbent, the column shows extra-large column-capacity, being almost 300 times larger than that of common commercial capillary columns, leading to good selectivities and resolutions even in the presence of large amount of interferents.

中文翻译：

具有适应性孔的灵活的金属有机框架，可实现高柱容量的气相色谱分离†

Zn（NO ₃）₂与双功能配体4-（3,5-二甲基-1 H-吡唑-4-基）苯甲酸（H ₂ mpba）的溶剂热反应，以苯为模板，得到了互穿的两倍多孔结构[Zn ₂（Hmpba）₂（mpba）]·2C ₆ H ₆（1 ·C ₆ H ₆或MCF-54），在甲醇活化和吸附后显示单晶至单晶（SCSC）结构转变，甲苯和环己烷。单晶结构分析和计算模拟表明，化合物1拥有针对各种形状或客人布置的适应性毛孔。使用硅橡胶作为粘合剂，将微晶粉末1涂覆在用于气相色谱的毛细管柱的内表面上，该色谱柱显示出高分离性能和/或类似苯同系物的异常分离顺序。由于吸附剂的负载量大，因此色谱柱显示出超大的色谱柱容量，几乎是普通商用毛细管柱的300倍，即使在存在大量干扰物的情况下，也具有良好的选择性和分离度。

更新日期：2018-08-29

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