具有大储氢容量和选择性二氧化碳吸附性能的扩展多孔MOF-505类似物。

Expanded porous MOF-505 analogue exhibiting large hydrogen storage capacity and selective carbon dioxide adsorption.

作者信息

Zheng Baishu, Yun Ruirui, Bai Junfeng, Lu Zhiyong, Du Liting, Li Yizhi

机构信息

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China.

出版信息

Inorg Chem. 2013 Mar 18;52(6):2823-9. doi: 10.1021/ic301598n. Epub 2013 Mar 4.

DOI:10.1021/ic301598n

PMID:23458072

Abstract

An expanded 4,4-paddlewheel-connected porous MOF-505-type metal-organic framework (MOF), [Cu2(PDEB)(H2O)2]·xS (NJU-Bai12; NJU-Bai represents the Nanjing University Bai group and S represents noncoordinated solvent molecules) has been designed from a nanosized rectangular diisophthalate linker containing alkyne groups 5,5'-(1,4-phenylenedi-2,1-ethynediyl)bis(1,3-benzenecarboxylic acid). This MOF material possesses permanent microporosity with the highest Brunauer-Emmett-Teller surface area of 3038 m(2)·g(-1) and the largest unsaturated total hydrogen storage capacity of 62.7 mg·g(-1) at 77 K and 20 bar among reported MOF-505 analogues. Additionally, NJU-Bai12 also exhibits excellent carbon dioxide (CO2) uptake capacity (23.83 and 19.85 mmol·g(-1) at 20 bar for 273 and 298 K, respectively) and selective gas adsorption properties with CO2/CH4 selectivity of 5.0 and CO2/N2 selectivity of 24.6 at room temperature.

摘要

一种扩展的、由4,4-桨轮连接的多孔MOF-505型金属有机框架（MOF），即[Cu2(PDEB)(H2O)2]·xS（NJU-Bai12；NJU-Bai代表南京大学的白课题组，S代表未配位的溶剂分子），是由含有炔基的纳米级矩形二异邻苯二甲酸酯连接体5,5'-(1,4-亚苯基二-2,1-乙炔二基)双(1,3-苯二甲酸)设计而成。这种MOF材料具有永久性微孔，在已报道的MOF-505类似物中，其布鲁诺尔-埃米特-泰勒比表面积最高可达3038 m²·g⁻¹，在77 K和20 bar条件下的最大不饱和总储氢容量为62.7 mg·g⁻¹。此外，NJU-Bai12还表现出优异的二氧化碳（CO₂）吸附能力（在20 bar下，273 K和298 K时分别为23.83和19.85 mmol·g⁻¹）以及在室温下对CO₂/CH₄的选择性为5.0、对CO₂/N₂的选择性为24.6的选择性气体吸附特性。