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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Novel crystallization of organic molecules mediated by solvent shell formation using solute-solvent interaction in binary solvent system

2015년 9월 3일 10시 21분 13초
INOR.P-129 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 15일 (목요일) 11:00~12:30
저자 및
박요환, 최희철*
포항공과대학교(POSTECH) 화학과, 기초과학연구원 CALDES, Korea
Solution-phase crystallization has been widely studied so far, because it enables to control diverse parameters of growth. Among various solution-phase crystallization methods, liquid-liquid interfacial precipitation (LLIP) is especially useful to control the local environment of the solutes, because it introduces an anti-solvent that decreases the solubility of the solutes. However, LLIP cannot fully control the environment around the nucleation seeds, because the range of the anti-solvents is limited and the initial solution is homogeneous. To this end, we introduce a novel method that can control the local environment of solutes in binary solvent mixture system by forming shells of specific chemical species around the nucleation seeds. As a proof of concept, we chose metalloporphyrin derivatives as the target solute molecule, because they are difficult to be crystallized without the use of external ligand or metal ion auxiliaries despite their wide applications in dyes, catalysts, and photodynamic therapy. Therefore, the preparation of metalloporphyrin crystals, or the direct self-assembly of metalloporphyrin into coordination polymers, bears great importance. In this presentation, we show the crystallization of zinc-tetra(4-pyridyl)porphyrin (ZnTPyP), where their aromatic macrocycle ring with well-defined π-conjuated system and various functional groups can effectively interact with solvent molecules. Based on this method, we prepared cube-shaped single crystals of ZnTPyP, and we expect that this method can be generalized to other molecules.