1. Synthesis of Metal-Organic Frameworks (MOFs)
Metal-organic frameworks (MOFs) are an organic and inorganic hybrid polymeric material. In the light of growing interests on the emergent nanoporous materials including MOFs, especially as materials for storage, separation, catalysis and transport, considerable efforts have been given to get custom designed internal environments of pores or channels. Synthesis of new MOFs has become immensely important because of their potential applications in gas storage and separation.
- Carbon dioxide storage and separation
CO2 is one of the most important greenhouse gasses. Recently, as increasing the average temperature of the earth, sequestration or conversion of CO2 became an important issue in chemistry. Chemists can synthesize new adsorbent for storage or separation and can design new catalyst for conversion of CO2. New MOFs and related porous materials which adsorb CO2 selectively will be prepared.
Reference
Kim, H; Kim, Y.; Yoon, M.; Lim, S.; Park, S.; Seo, G.; Kim, K. "Highly Selective Carbon Dioxide Sorption in an Organic Molecular Porous Material" J. Am. Chem. Soc. 2010, 132, 12200-12202.
Yoon, M.;* Moon, D.* "New Zr (IV) based metal-organic framework comprising a sulfur-containing ligand: Enhancement of CO2 and H2 storage capacity" Micropor. Mesopor. Mater. 2015, 215, 116-122.
- Environmental applications of MOFs
MOF were successfully employed for environmental applications including dye adsorption and degradation.
Reference
Hahm, H.; Kim, S.;Ha, H.; Jung, S.; Kim, Y.; Yoon, M.;* Kim, M.* "Charged Functional Group Effects on Metal-Organic Framework for Selective Organic Dye Adsorptions" CrystEngComm, 2015, 17, 8418-8422.
2. Environmental Applications of Natural Resource Derived Nanomaterials
Iron oxide (Fe3O4) composite materials are useful for environmental applications due to their unique surface properties and magnetic properties. We are recently working on the synthesis of Fe3O4 nanoparticles utilizing bioresource (pineapple extracts). The Fe3O4 nanoparticles are further functionalized for environmental applications especially heavy metal removal. In addition, onion was used for the preparation of 2D carbon flakes, which was further functionalized by Fe3O4 nanoparticles for arsenite removal. Recent works are also focus on heavy metal ions removal and sensing using natural resource derived nanmaterials.
References
Venkateswalru, S.; Yoon, M.* "Rapid removal of cadmium ions using green-synthesized Fe3O4 nanoparticles capped with diethyl-4-(4 amino-5- mercapto-4H-1,2,4-triazol-3-yl)phenyl phosphonate" RSC Adv. 2015, 6, 65444-65453.
Venkateswalru, S.; Yoon, M.* "Surfactant-Free Green Synthesis of Fe3O4 Nanoparticles capped with 3,4-Dihydroxyphenethylcarbamodithioate: Stable Recyclable Magnetic Nanoparticles for Rapid and Efficient Removal of Hg(II) Ions from Water" Dalton Trans. 2015, 44, 18427-18437.
Venkateswalru, S.; Yoon, M.* "Core-Shell Ferromagnetic Nanorod Based on Amine Polymer Composite (Fe3O4@DAPF) for Fast Removal of Pb(II) from Aqueous Solutions" ACS App. Mater. Inter. 2015, 7, 25362-25372.
Venkateswarlu, S.; Lee, D.;* Yoon, M.* "Bioinspired 2D-Carbon Flakes and Fe3O4 Nanoparticles Composite for Arsenite Removal" ACS App. Mater. Inter. 2016, 8, DOI: 10.1021/acsami.6b03583.
3. (Photo)catalytic MOFs
MOFs comprising photocatalytic ligands such as metalloporphyrins and metal-trisbpy can show photocatalytic activity. Synthesis and application of new photocatalytic MOFs may allow to overcome energy crisis of the world. In addition, reaction mechanism study of (photo)catalytic MOFs helps to design better (photo)catalysts. Mechanism study will be mainly base on X-ray crystallography.
References
Banerjee, M.; Das, S.; Yoon, M.; Choi, H. J.; Hyun, M. H.; Park, S. M.; Seo, G.; Kim, K. "Postsynthetic Modification Switches an Achiral Framework to Catalytically Active Homochiral Metal-Organic Porous Materials" J. Am. Chem. Soc. 2009, 131, 7524-7525.
Yoon, M.; Srirambalaji, R. Kim, K. "Homochiral Metal-Organic Frameworks for Asymmetric Heterogeneous Catalysis" Chem. Rev. 2012, 112, 1196-1231.
Srirambalaji, R.; Hong, S.; Natarajan, R.; Yoon, M.; Ko, Y.; Kim, Y.; Hota, R.; Kim, K. “Tandem Catalysis with Bifunctional Site-Isolated Lewis Acid-Brønsted Base Metal-Organic Framework, NH2-MIL-101(Al)” Chem. Commun. 2012, 48, 11650-11652.
4. Ion conduction in Porous Materials
Proton and lithium ion conducting materials can be used as a electrolyte of fuel cells or Li ion batteries, respectively. Although there are many commercially available ion conducting materials, high price and limited operation temperature limits there wide application. Therefore, development of new ion conducting materials is important issue in battery research. Especially, modularly built porous materials including MOFs and organic molecular porous materials allows a new opportunity as a new ion conducting material.
References
Yoon, M.; Suh, K.; Kim, H.; Kim, Y.; Selvapalam, N.; Kim, K. "High, Anisotropic Proton Conductivity in Organic Molecular Porous Materials" Angew. Chem., Int. Ed. 2011, 50, 7080-7083.
Yoon, M.; Suh, K.; Natarajan, S.; Kim, K. “Proton Conduction in Metal-Organic Frameworks and Related Materials” Angew. Chem. Int. Ed. 2013, 52, 2688-2700.
Park, J.; Suh, K.; Rohman, Md. R.; Hwang, W.; Yoon, M.; Kim, K. "Solid lithium electrolytes based on an organic molecular porous solid", Chem. Commun, 2015, 51, 9313-9316.
5. Synthesis of New Carbon Materials
Excellent adsorption properties of activated carbon materials, such as charcoal, have been known for centuries as food poisoning remedies or odor absorbers. Recently, porous coordination polymers (PCPs) or metal–organic frameworks (MOFs), which possess highly crystalline structures and large pores have also been employed for template casting of porous carbons. Synthesis of new porous carbon materials and their applications will be studied.
References
Lim, S.; Suh, K.; Kim, Y.; Yoon, M.; Park, H.; Dybtsev, D. N. and Kim, K. “Porous carbon materials with a controllable surface area synthesized from metal–organic frameworks” Chem. Comm. 2012, 48, 7447-7449.
Kim, E.; Yoon, M.* "Facile synthesis of g-Fe2O3@porous carbon materials using an Fe-based metal-organic framework: Structure and porosity control" J. Por. Mater. 2015, 22, 1495-1502.
6. Magnetic Properties
Many of transition metal ions or lanthanide ions usually have interesting magnetic properties. MOFs and other organometallic complexes shows interesting magnetic relaxation behavior, which is useful for design of memory devices. Therefore, development of new organometallic and MOFs with interesting magnetic properties is studied.
References
Kim, H.; Yoon, M.; Lee, G. H; Lee, D.-H.; Kim, K.; Park, G. “Synthesis of 2D Metal-Organic Networks with Large Internal Cavities and Their Magnetic Properties” Inorg. Chem. Comm. 2012, 21, 137-141.
Ren, M.; Pinkowicz, D.; Yoon, Y.; Kim, K.; Zheng, L.-M.; Breedlovea, B. K.; Yamashita, M. "Dy(III) Single-Ion Magnet Showing Extreme Sensitivity to (de)hydration" Inorg. Chem. 2013, 52, 8342-8348.
국가
대한민국
소속기관
경북대학교 (학교)
연락처
053-950-6347 https://sites.google.com/site/yoongroup0/
책임자
윤민영 myyoon@knu.ac.kr