120th General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code INOR.P-30
Subject Functional Group Controls in Zr-MOFs for Xe/Kr Separation [동우화인켐㈜ 대학(원)생 선정 포스터상]
Authors Seongwoo Kim, Min Kim*
Department of Chemistry, Chungbuk Natioanl University, Korea
Abstract Among the various MOFs (metal-organic frameworks), group IV metal, a zirconium-based MOF, UiO-66 (UiO = University of Oslo), is considered to be one of the most chemically and physically stable MOFs. Using their superior stability, a variety application has been reported including catalysis and industrial applications. And, moreover, Zr-MOF has recently been shown to be a good candidate for adsorptive separation of Xe/Kr mixtures. Since the ability to impart chemical functionalities is an attractive characteristic of MOFs, herein, we prepared a series of functionalized UiO-66 materials (UiO-66-NH2, UiO-66-(OMe)2, UiO-66-NH2(OMe)2, and UiO-66-F4) by incorporating pre-synthesized several polar functionalities into UiO-66 framework.
We found that a series of electron-rich and electron-deficient UiO-66 materials have stronger interactions with Xe and Kr atoms than pristine UiO-66. We also found that Xe/Kr selectivity increases with the electron density of the ligand. Among the series of UiO-66s, UiO-66-NH2(OMe)2 exhibited the highest Xe/Kr Henry's constant ratio (14.4), possibly due to having the highest electron density as well as an unsymmetrical arrangement of functional groups of the ligands. The detail synthetic procedure of ligands and MOFs also will be presented.
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