一种基于四羧酸的多孔锌（II）配位聚合物，具有选择性CO吸附和碘摄取性能。

A porous Zn(ii)-coordination polymer based on a tetracarboxylic acid exhibiting selective CO adsorption and iodine uptake.

作者信息

Arici Mürsel, Alp Arici Tuğba, Demiral Hakan, Taş Murat, Yeşilel Okan Zafer

机构信息

Department of Chemistry, Faculty of Science and Letters, Eskişehir Osmangazi University, 26040 Eskişehir, Turkey.

Department of Chemical Technology, Emet Vocational School, Kütahya Dumlupınar University, 43700, Kütahya, Turkey.

出版信息

Dalton Trans. 2020 Aug 11;49(31):10824-10831. doi: 10.1039/d0dt01875a.

DOI:10.1039/d0dt01875a

PMID:32700692

Abstract

A porous Zn(ii)-coordination polymer, namely {[Zn2(μ8-abtc)(betib)]·DMF}n (1), was solvothermally synthesized from 3,3',5,5'-azobenzenetetracarboxylate (abtc4-) and 1,4-bis(2-ethylimidazol-1-yl)butane (betib) ligands and {[Zn2(μ8-abtc)(betib)]·H2O}n (2) was obtained through the immersion of 1 in methanol. Compounds 1 and 2 were structurally characterized via numerous techniques. Both compounds displayed a 3D porous framework with a 3,6-connected sqc5381 net. Compound 2a obtained at 140 °C from 2 exhibited gas and iodine adsorption properties. Interestingly, the compound adsorbed selectively CO2 with the uptake capacity of 54.02 cm3 g-1 (13.26%) over N2 (5.43 cm3 g-1) and CH4 (14.53 cm3 g-1) at 273 K. The compound also adsorbed iodine with the weights of 19.99% and 30.26% in solution and vapor phases, respectively. The single crystal X-ray result and Raman spectra showed the presence of iodine units in the pores of the framework.

摘要

一种多孔锌（II）配位聚合物，即{[Zn2(μ8-abtc)(betib)]·DMF}n (1)，由3,3',5,5'-偶氮苯四羧酸酯（abtc4-）和1,4-双（2-乙基咪唑-1-基）丁烷（betib）配体通过溶剂热合成得到，并且通过将1浸入甲醇中获得了{[Zn2(μ8-abtc)(betib)]·H2O}n (2)。通过多种技术对化合物1和2进行了结构表征。两种化合物均显示出具有3,6-连接的sqc5381网络的三维多孔框架。在140°C下由2得到的化合物2a表现出气体和碘吸附性能。有趣的是，该化合物在273K下对CO2具有选择性吸附，吸附容量为54.02 cm3 g-1（13.26%），高于N2（5.43 cm3 g-1）和CH4（14.53 cm3 g-1）。该化合物在溶液相和气相中对碘的吸附重量分别为19.99%和30.26%。单晶X射线结果和拉曼光谱表明框架孔中存在碘单元。