title: Tuning Pore Size in Square-Lattice Coordination Networks for Size-Selective Sieving of CO2.
abstract: Porous materials capable of selectively capturing CO2 from flue-gases or natural gas are of interest in terms of rising atmospheric CO2 levels and methane purification. Size-exclusive sieving of CO2 over CH4 and N2 has rarely been achieved. Herein we show that a crystal engineering approach to tuning of pore-size in a coordination network, [Cu(quinoline-5-carboxyate)2 ]n (Qc-5-Cu) ena+bles ultra-high selectivity for CO2 over N2 (SCN ≈40 000) and CH4 (SCM ≈3300). Qc-5-Cu-sql-β, a narrow pore polymorph of the square lattice (sql) coordination network Qc-5-Cu-sql-α, adsorbs CO2 while excluding both CH4 and N2 . Experimental measurements and molecular modeling validate and explain the performance. Qc-5-Cu-sql-β is stable to moisture and its separation performance is unaffected by humidity.
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland.|MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Kai-Jie
authors.identifier: 0000-0001-7581-6571
authors.initials: KJ
authors.lastname: Chen
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland.
authors.forename: David G
authors.identifier: 0000-0003-3875-9146
authors.initials: DG
authors.lastname: Madden
authors.affiliation: Department of Chemistry, University of South Florida, 4202 E. Fowler Ave., CHE205, Tampa, FL, 33620-5250, USA.
authors.forename: Tony
authors.initials: T
authors.lastname: Pham
authors.affiliation: Department of Chemistry, University of South Florida, 4202 E. Fowler Ave., CHE205, Tampa, FL, 33620-5250, USA.
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Forrest
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland.
authors.forename: Amrit
authors.identifier: 0000-0002-6329-4582
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland.
authors.forename: Qing-Yuan
authors.identifier: 0000-0002-1742-2088
authors.initials: QY
authors.lastname: Yang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xue
authors.affiliation: Department of Chemistry, University of South Florida, 4202 E. Fowler Ave., CHE205, Tampa, FL, 33620-5250, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Space
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland.
authors.forename: John J
authors.identifier: 0000-0001-9393-5451
authors.initials: JJ
authors.lastname: Perry
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, P.R. China. zhangjp7@mail.sysu.edu.cn.
authors.forename: Jie-Peng
authors.initials: JP
authors.lastname: Zhang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Chen
authors.affiliation: Department of Chemical & Environmental Sciences, Bernal Institute, University of Limerick, Plassey House, Limerick, Republic of Ireland. Michael.Zaworotko@ul.ie.
authors.forename: Michael J
authors.identifier: 0000-0002-1360-540X
authors.initials: MJ
authors.lastname: Zaworotko
keywords: CO2 separation; gas sorption; molecular sieving effect; stability; supramolecular isomerism