나노 크기의 금속 유기 골격체, ZIF-8 합성을 위한 이온성 액체 마이크로에멀젼 합성법의 체계적 연구

Abstract

Porous Metal-Organic Frameworks (MOFs) are composed of metal ions and organic ligands. Recently, nano-sized MOFs have been widely utilized in biomedical fields, including biosensing and drug delivery. Researchers are primarily focusing on reducing their particle sizes to the nanoscale with a uniform size distribution. An ionic liquid microemulsion, the one of the MOF synthesis mehtods is in the limelight as an effective way with the following advantages: grain size uniformity and eco-friendliness. In this work, systematic study to control grain size, morphology, and yield of ZIF-8 (Zeolitic Imidazolate Framework-8) through ionic liquid microemulsion method was conducted in the new systems ‘water / surfactant (TX-100 or AOT) / CnmimX (n, the number of carbon = 2, 3, 4, 6, 8, 10 / X = Cl, Br, I)’. Furthermore, not only how the type of anion of ionic liquids, the length of carbon chain in them, the type of surfactants and the mass ratio change of the components affect the ZIF-8 synthesis results, respectively, was analyzed quantitatively through several characterization methods such as PXRD, TEM, DLS and FT-IR. Through this study, we aim to shed light on the infinite possibility of ionic liquid microemulsion method to synthesize desired size of nano-size MOF with uniformity.