121st General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code INOR.P-197
Subject Diffusion-Control in the In Situ Synthesis of Metal-Organic Frameworks within an Ionic Polymer Matrix
Authors Eun Ji Lee, Nak Cheon Jeong1,*
EMS, Daegu Gyeongbuk Institute of Science & Technology, Korea
1Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology, Korea
Abstract A recently fueling interest in MOFs is the fabrication of MOFs in the form of mixed matrices (MMs) with eco-friendly polymers, in part, because MOF–polymer MMs are a highly useful platform to utilize MOFs for potential applications involving molecular sorption, chemical separation, and chemical sensing, and in part, because global demand for sustainability is rapidly increasing. However, given that post-fabricated MOF-MMs prepared by mixing presynthesized MOF crystallites with a polymer have often been characterized by (i) inhomogeneous distribution of the MOF particles in the polymer matrix and (ii) inferior junction-contact between MOF crystal and polymer matrix, an alternating method to resolve these negative factors must be developed. In this poster presentation, we will introduce a new strategy for the in situ synthesis of MOFs in an eco-friendly ionic polymer, alginate (hereafter ALG), with the form of mixed matrices (MMs). We found that the in situ synthesis of MOF-polymer MMs is, in fact, an interestingly alternating method to the conventional postfabrication of MMs because the sequential order of supplying MOF ingredients (either metal ion, i.e., Cu2+, or deprotonated ligand, i.e., benzenetricarboxylate (BTC3–)) into the alginate matrix leads to different results. For the examples examined, the infusion of BTC3− ligand into Cu2+-exchanged ALG engendered the eggshell-shaped HKUST-1 layers on the surface of MM spheres, the infusion of Cu2+ ions into BTC3–-included ALG engendered the high dispersivity and junction contact of HKUST-1 crystals in the alginate matrix. Using molecular dyes, further, we demonstrate that MOF-MMs directly and homogeneously grown by this in situ methodology exhibits size-selective molecular uptake.
E-mail eunji6707@dgist.ac.kr