Hydrogen storage in a microporous metal-organic framework with exposed Mn2+ coordination sites
Hydrogen storage in a microporous metal-organic framework with exposed Mn2+ coordination sites
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DOI：
10.1021/ja0656853
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发表时间：
2006-12-27
影响因子：
15
通讯作者：
Long, Jeffrey R.
中科院分区：
文献类型：
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作者：
Dinca, Mircea;Dailly, Anne;Long, Jeffrey R.
使用三位桥接配体1,3,5-苯三四唑酸酯（BTT3-）可以形成[Mn(DMF)(6)](3)[(Mn4Cl)(3)(BTT)(8)(H2O)(12)](2)中心点42DMF中心点11H(2)O中心点20CH(3)OH，具有多孔金属有机框架，具有未知的立方拓扑结构。该化合物的晶体在溶解后保持完整，在77 K和90 bar条件下，总H-2吸收率为6.9 wt %，在60 g H-2/L条件下，其储存密度为液态氢的85%。该材料的最大等等吸附热为10.1 kJ/mol，是迄今为止观察到的金属-有机骨架中最高的。中子粉末衍射数据表明，这与框架内配位不饱和Mn2+中心的H-2结合直接相关。
Use of the tritopic bridging ligand 1,3,5-benzenetristetrazolate (BTT3-) enables formation of [Mn(DMF)(6)](3)[(Mn4Cl)(3)(BTT)(8)(H2O)(12)](2)center dot 42DMF center dot 11H(2)O center dot 20CH(3)OH, featuring a porous metal-organic framework with a previously unknown cubic topology. Crystals of the compound remain intact upon desolvation and show a total H-2 uptake of 6.9 wt % at 77 K and 90 bar, which at 60 g H-2/L provides a storage density 85% of that of liquid hydrogen. The material exhibits a maximum isosteric heat of adsorption of 10.1 kJ/mol, the highest yet observed for a metal-organic framework. Neutron powder diffraction data demonstrate that this is directly related to H-2 binding at coordinatively unsaturated Mn2+ centers within the framework.