Pore engineering via controlled decomposition of counter cations in an anion-based metal-organic frameworkOA
Manipulating the organic counter cations,which serve as pore gatekeepers to selectively obstruct the channels in anionic metal-organic frameworks(MOFs),offers a highly effective strategy for optimizing the separation performance.Here,we report an yttrium-based MOF,Y-ebdc,featuring cage-type structures that accommodate protonated dimethylamine(DMA)as both counter cations and molecular sieving gates.Subsequent optimization of the adsorption separation performance for propylene/propane(C_(3)H_(6)/C_(3)H_(8))was achieved through regulation of DMA’s thermal decomposition.The temperature dependence of DMA decomposition was elucidated using temperature-resolved in situ infrared spectroscopy and breakthrough studies.With approximately 70%of DMA removed,the expanded aperture window and increased pore volume remarkably enhance dynamic C_(3)H_(6)uptake while simultaneously facilitating the direct production of polymer-grade(>99.5%)C_(3)H_(6)in a single adsorption-desorption cycle.This study exemplifies how engineering the pore environment via co-existing counter cations within MOFs can effectively boost gas adsorption and separation performance.
Zongkai Liu;Bingquan Hua;Tianyou Lu;Guanying Dong;Jingwei Hou;Xiaoquan Feng;Yatao Zhang
School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,The University of Queensland St Lucia,QLD 4072,AustraliaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
化学化工
C_(3)H_(6)/C_(3)H_(8)metal-organic frameworks(MOFs)guest molecule regulationpore engineering
《Nano Research》 2026 (3)
P.897-904,8
supported by the National Natural Science Foundation of China(Nos.22208318 and U25A20608)the Science and Technology Innovation Leading Talent Support Program of Henan Province(No.254200510023)the Science and Technology Research Project of Henan Province(No.252102231025).
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