A Selenophene-Incorporated Metal-Organic Framework for Enhanced CO2 Uptake and Adsorption Selectivity

被引:17
作者
Demakov, Pavel A. [1 ,2 ]
Volynkin, Sergey S. [1 ]
Samsonenko, Denis G. [1 ,2 ]
Fedin, Vladimir P. [1 ,2 ]
Dybtsev, Danil N. [1 ,2 ]
机构
[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Dept Nat Sci, 2 Pirogova St, Novosibirsk 630090, Russia
来源
MOLECULES | 2020年 / 25卷 / 19期
基金
俄罗斯科学基金会;
关键词
porous metal– organic frameworks; selenophene; X-ray diffraction studies; adsorption measurements; gas adsorption selectivity; CRYSTAL-STRUCTURE; CAPTURE; SORPTION; DICARBOXYLATE; MOF; ZR; PROGRAM; STORAGE; ACID;
D O I
10.3390/molecules25194396
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A new metal-organic coordination polymer [Zn-2(sedc)(2)(dabco)] (1se; sedc(2-) = selepophene-2,5-dicarboxylate; dabco = 1,4-diazabicyclo[2.2.2]octane) was synthesized and characterized by single-crystal X-ray diffraction analysis. This MOF is based on {Zn-2(OOCR)(4)N-2} paddle wheels and is isoreticular to the family of [Zn-2(bdc)(2)(dabco)] derivatives (1b; bdc(2-) = 1,4-benzenedicarboxylate) with pcu topology. The gas adsorption measurements revealed that 1se shows a 15% higher CO2 volumetric uptake at 273 K and 28% higher CO2 uptake at 298 K (both at 1 bar) compared to the prototypic framework 1b. Methane and nitrogen adsorption at 273 K was also investigated, and IAST calculations demonstrated a pronounced increase in CO2/CH4 and CO2/N-2 selectivity for 1se, compared with 1b. For example, the selectivity factor for the equimolar CO2/CH4 gas mixture at 1 bar = 15.1 for 1se and 11.9 for 1b. The obtained results show a remarkable effect of the presence of selenium atom on the carbon dioxide affinity in the isoreticular metal-organic frameworks with very similar geometry and porosity.
引用
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页数:12
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