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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Diffusion-Control in the In Situ Synthesis of Metal-Organic Frameworks within an Ionic Polymer Matrix

2018년 2월 12일 22시 57분 28초
INOR.P-197 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
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
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.