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Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction

세미나가 이번 주 목요일(11월 3일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다.===============================================================================제 목 : Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction연 사 : 서준혁 교수(GIST)일 시 : 2022년 11월 3일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실================================================================================Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction Junhyeok Seo Department of Chemistry, GISTGwangju 61005, Republic of KoreaE-mail: seojh@gist.ac.kr Abstract: Coordination complexes experience structural reorganizations along with electron transfers into the systems. The electron-induced reorganization would likely open a reaction site for substrates and provide a new reaction pathway in energy conversion and storage applications involving small molecules such as H2 or CO2. Polypyridyl complexes have shown abilities as electrocatalysts in H2 evolution reaction (HER) and CO2 reduction reaction (CO2RR). A proton-transfer process is a key step in determining the catalytic efficiency in the proton reduction reaction. On the other hand, individual electron and proton transfer steps should be controlled to enhance CO2RR selectively; otherwise, the thermodynamically favored HER will become dominant. In current examples, we synthesized NNN-Co-(bulky π-acceptor) complexes and could selectively dissociate Co–N (of tertiary amine donor) bond by initial two-electron transfers. The electron-induced structural reorganization led to a direct CO2 activation, and the subsequent proton transfer enhanced the CO2-to-CO conversion. In this talk, we will discuss the recent findings about the electron-induced reorganization of Co and Fe coordination complexes and the effect on the selective reactions toward protons and CO2.
- 2022년 11월 3일(목) 오후 4시 30분
- 330226호실
- POSTED DATE : 2022-11-03
- WRITER : 화학과
- HIT : 1582
Materials and Interface Engineering for Membrane-Electrode-Assembly from Hydrogen Fuel Cell to Water Electrolyzer

세미나가 이번주 목요일(10월 27일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다.===============================================================================제 목 : Materials and Interface Engineering for Membrane-Electrode-Assembly from Hydrogen Fuel Cell to Water Electrolyzer연 사 : 김진영 박사(KIST)일 시 : 2022년 10월 27일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실================================================================================Materials and Interface Engineering for Membrane-Electrode-Assembly from Hydrogen Fuel Cell to Water ElectrolyzerJin Young Kim*Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology, Korea* jinykim@kist.re.krAdvances in fuel cell and water electrolyzer are urgently needed to increase the performance and reduce the cost of electrochemical conversion and utilization of hydrogen. Polymer membrane and electrodes are the core components to produce the electrochemical reaction and rapid progress in their development has increased its electrochemical-power conversion efficiencies and lifetime. Recent research and application activities include high performance Pt alloy catalysts, thin film nanostructured electrocatalyts, durable carbon support, polymer composite membrane, and radical scavengers. Moreover, the nanometer and micrometer scale interfaces in the membrane-electrode assembled layers are crucial for the scalable and sustainable electrochemical processes. In this talk, our recent results from these activities will be presented.
- 2022년 10월 27일(목) 오후 4시 30분
- 330226호실
- POSTED DATE : 2022-10-26
- WRITER : 화학과
- HIT : 1535
Catalytic Functionalization of Nitrogen Compounds: From Selective C–H Amination to Photocatalytic Ammonia Synthesis

세미나가 이번주 목요일(10월 13일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다.===============================================================================제 목 : Catalytic Functionalization of Nitrogen Compounds: From Selective C–H Amination to Photocatalytic Ammonia Synthesis연 사 : 박윤수 교수(KAIST)일 시 : 2022년 10월 13일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실================================================================================Catalytic Functionalization of Nitrogen Compounds:From Selective C–H Amination to Photocatalytic Ammonia SynthesisYoonsu ParkDepartment of Chemistry, Korea Advanced Institute of Science and Technology (KAIST),Daehak-ro 291, Yuseong-gu, Daejeon 34141, Republic of Korea.Webpage: https://ypark-lab.com/ Email: yoonsu.park@kaist.ac.krNitrogen-containing molecules are of great importance in the field of organic chemistry, inorganic synthesis, and material science owing to their unique chemical and physical properties.1In this talk, I will showcase how a well-defined molecular catalyst could give an efficient and selective access to various classes of nitrogen compounds. In the first part of the talk, mechanistically driven discovery of novel class of amide agents will be discussed. Extensive Investigation on rhodium-catalyzed C–H amidation with organic azide led us to introduce 1,4,2-dioxazol-5-ones as highly efficient amide precursor.2 An integrated low-temperature NMR kinetics and computational study revealed a key role of high-valent metal-nitrenoid intermediate,3 and further efforts to utilize its reactivity enabled to design a new array of iridium catalysts for γ-lactam formation.4 Asymmetric5 and site-selective6 catalysis has been also achieved by utilizing noncovalent interactions. The second part of the talk will focus on the development of bifunctional photocatalysts for ammonia synthesis. Proton-coupled electron transfer using molecular hydrogen as a terminal reductant is an attractive strategy for synthesizing weak element-hydrogen bonds, but the intrinsic thermodynamics presents a challenge for reactivity. I will describe the direct photocatalytic synthesis of weak element-hydrogen bonds of unsaturated organic molecules7 as well as metal-nitrogen compounds.8Activation of molecular hydrogen occurs in the ground state and the resulting iridium hydride harvests visible light to enable spontaneous formation of weak chemical bonds near thermodynamic potential withoutany by-product. Transient absorption spectroscopic studies revealed a triplet-triplet energy transfer as the photophysical initiation process. Identification of catalyst deactivation pathway led to a design of the nextgeneration catalyst with improved photostability and better catalytic performance.9References1. Park, Y.; Kim, Y.; Chang S. Chem. Rev. 2017, 117, 9247.2. Park, Y.; Park, K. T.; Kim, J. G.; Chang S. J. Am. Chem. Soc. 2015, 137, 4534.3. Park, Y.; Heo, J.; Baik, M.-H.; Chang, S. J. Am. Chem. Soc., 2016, 138, 14020.4. Hong, S. Y.†; Park, Y.†; Hwang, Y.; Kim, Y. B.; Baik, M.-H.; Chang, S. Science 2018, 359,1016. († denotes co-first authors)5. Park, Y.; Chang, S. Nat. Catal. 2019, 2, 219.6. Jung, H.; Schrader, M.; Kim, D.; Baik, M.-H.*; Park, Y.*; Chang, S.* J. Am. Chem. Soc. 2019, 141, 15356–15366.7. Park, Y.; Kim, S.; Tian, L.; Zhong, H.; Scholes, G. D.; Chirik, P. J. Nat. Chem. 2021, 13, 969.8. Park, Y.; Semproni, S. P.; Zhong, H. Chirik, P. J. Angew. Chem. Int. Ed. 2021, 60, 14376.9. Park, Y.†; Tian, L.†; Kim, S.; Pabst, T. P.; Kim, J.; Scholes, G. D.; Chirik, P. J. JACS Au 2022, 2, 407.
- 2022년 10월 13일(목) 오후 4시 30분
- 330226호실
- POSTED DATE : 2022-10-11
- WRITER : 화학과
- HIT : 1897
Challenging Organic and Medicinal Chemistry with Creative and Convergence Research

특별 세미나가 이번주 화요일(10월 11일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다.===============================================================================제 목 : Challenging Organic and Medicinal Chemistry with Creative and Convergence Research 연 사 : 금교창 박사님(KIST)일 시 : 2022년 10월 11일(화) 오후 4시 30분장 소 : 화학관 1층 330118호실================================================================================Challenging Organic and Medicinal Chemistrywith Creative and Convergence ResearchGyochang KeumCreative Research Center for Brain Science, Brain Science Institute,Korea Institute of Science and Technology (KIST), Seoul, KoreaE-mail: gkeum@kist.re.krOrganic synthesis is the study on the development of synthetic methodology and total synthesis of organic molecules, and can be applied to the fields such as foods, pharmaceuticals and materials. Organic synthesis needs both inductive and deductive approaches to develop efficient routes for constructing complex molecular architectures and controlling stereochemistry in natural products. In the area of synthetic methodology, multicomponent Ugi reaction, organic syntheses utilizing indium metal or Baker’s yeast in aqueous media, and total synthesis of natural products such as rolliniastatin 11 will be presented.Medicinal chemistry, related with design, chemical synthesis and development for the market of bio-active molecules, is highly interdisciplinary sciences at the interface of chemistry, pharmacology, various biology, and business. Practitioners need a strong background in these fields, and creative and convergence research is key strategies in the discovery of new drugs. In the area of medicinal chemistry, I focused on the development of drugs and diagnosis technology targeting GPCRs and ion channels for the treatment of neurological diseases. In addition, anticancer agents2, anti-HCV, and antibiotic agents were also studied.Recently, I have focused on the development of lipid nanoparticles for the formulation of mRNA vaccine and therapeutics which require safe, effective and stable delivery systems against coronavirus disease 2019 (COVID-19) and other infectious diseases.3 References1. G Keum, et al.,E Lee, J. Am. Chem. Soc. 2005, 127, 10396–10399.2. AK. El-Damasy, et al., G Keum,* Eur. J. Med. Chem., 2020, 207, 1127103. HJ Park, et al., G Keum,* and JH Nam*, Angew. Chem. Int. Ed. 2020, 59, 11540
- 2022년 10월 11일(화) 오후 4시 30분
- 330118호실
- POSTED DATE : 2022-10-11
- WRITER : 화학과
- HIT : 1496
When Art and Science Meet (Flow Chemistry를 활용한 Risk Process 적용)

특별 세미나가 다음주 금요일(10월 7일) 오후 4시에 개최됩니다.많은 참여 부탁드립니다.* 이번학기 세미나는 별도 공지가 없는 한 오프라인 세미나로 진행됩니다.===============================================================================제 목 : When Art and Science Meet (Flow Chemistry를 활용한 Risk Process 적용)연 사 : 김경일 책임연구원(WELL ENC)일 시 : 2022년 10월 7일(금) 오후 4시장 소 : 화학관 2층 330226호실================================================================================발표 주제: When Art and Science Meet (Flow Chemistry를 활용한 Risk Process 적용)내용: Flow Reactor의 소개 및 이를 활용한 현장 적용된 다양한 화학 반응의 소개
- 2022년 10월 7일(금) 오후 4시
- 화학관 2층 330226호실
- POSTED DATE : 2022-09-30
- WRITER : 화학과
- HIT : 1544
Neutrophil Dysfunction in Pulmonary Post-Acute Sequelae of SARS CoV-2 infection (PASC)

세미나가 다음주 목요일(10월 6일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다.* 온/오프라인 세미나로 진행됩니다.===============================================================================제 목 : Neutrophil Dysfunction in Pulmonary Post-Acute Sequelae of SARS CoV-2 infection (PASC)연 사 : 박주원 교수(하와이 대학교)일 시 : 2022년 10월 6일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실<Webex참여>방번호: 170 974 2739링크: https://skku-ict.webex.com/meet/chem================================================================================AbstractCoronavirus disease 2019 (COVID-19) is a novel, viral-induced respiratory disease that in nearly one third of individuals patients have residual symptoms, so called Post-Acute Sequelae of SARS-CoV-2 infection (PASC). Neutrophils have a critical role of host defense against infection, but uncontrolled or inappropriate neutrophil responses can contribute to immunopathology in infection, inflammatory diseases, and acute respiratory distress syndrome related to COVID-19. Literature to date demonstrates compelling evidence of increased neutrophils counts and neutrophil extracellular traps (NETs) formation, a type of neutrophils’ defense mechanism in the circulation and lungs of COVID-19 patients. Excessive NET formation has the potential to initiate and propagate inflammation and microthrombosis supporting the hypothesis that NETs induce organ damages during COVID19 infection that linked to develop prolonged symptoms. In this seminar, I will share the current knowledge on neutrophils and COVID-19 pathogenesis with a particular emphasis on NET. Also, I will introduce my current research project investigating phenotypic alteration of low-density granulocyte, a subset of neutrophils within peripheral blood mononuclear cells (PBMC) fraction in individuals up to fourteen months after COVID-19 infection, alongside comparator groups, with and without, residual pulmonary symptoms.
- 2022년 10월 6일(목) 오후 4시 30분
- 화학관 2층 330226호실/Webex
- POSTED DATE : 2022-09-30
- WRITER : 화학과
- HIT : 1514
Bismuth Redox Catalysis

세미나가 다음주 목요일(9월 29일) 오후 4시 30분에 개최됩니다.* 이번 세미나는 온라인으로 진행되오니 착오없으시길 바랍니다. 온라인으로 많은 참여 부탁드립니다.===============================================================================제 목 : Bismuth Redox Catalysis연 사 : Dr. Josep Cornella(Max-Planck-Institut für Kohlenforschung)일 시 : 2022년 9월 29일(목) 오후 4시 30분<Webex참여>방번호: 170 974 2739링크: https://skku-ict.webex.com/meet/chem================================================================================Bismuth Redox Catalysis Josep CornellaMax-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, 45470, Germanycornella@kofo.mpg.de The ability of the main group element bismuth (Bi) to maneuver between different oxidation states in a catalytic redox cycle will be presented. We will show how Bi mimics the canonical organometallic steps of a transition metal, thus challenging the current dogmas of redox catalysis.[1] A series of Bi complexes capable of revolving between oxidation states Bi(I)/Bi(III) and Bi(III)/Bi(V) have been unlocked and applied in various contexts of catalysis for organic synthesis. For example, capitalizing on the Bi(III)/Bi(V) redox pair, we have developed a catalytic protocol for the C‒F[2] and C‒OTf [3] bond formation from aryl boronic esters. On the other hand, a low-valent redox manifold based on Bi(I)/Bi(III) enabled the reduction of hydrazines and nitro compounds[4], the catalytic decomposition of the rather inert nitrous oxide (N2O),[5] the catalytic hydrodefluorination of C(sp2)‒F bonds.[6] In addition, we will show how one-electron pathways are also accessible, thus providing a platform for SET processes capitalizing on the triad Bi(I)/Bi(II)/Bi(III) for organic synthesis.[7] Finally, we will also show how redox-neutral catalytic pathways can unlock novel organic transformations via canonical organometallic steps.[8] For all methodologies, a combination of rational ligand design with an in depth analysis of all the catalytic steps proved crucial to unfold the catalytic properties of such an intriguing element of the periodic table.References[1] Moon, H. –W. ; Cornella, J. ACS. Catal. 2022, 12, 1382.[2] Planas, O.; Wang, F.; Leutzsch, M.; Cornella, J. Science, 2020, 367, 313..[3] Planas, O.; Peciukenas, V.; Cornella, J. J. Am. Chem. Soc. 2020, 142, 11382[4] Wang, F.; Planas, O.; Cornella, J. J. Am. Chem. Soc. 2019, 141, 4235.[5] Pang. Y.; Leutzsch, M.; Nöthling, N.; Cornella, J. J. Am. Chem. Soc. 2020, 142, 19473.[6] Pang, Y.; Leutzsch, M.; Nöthling, N.; Katzenburg, F.; Cornella, J. J. Am. Chem. Soc. 2021, 143, 12487.[7] Mato, M. ; Spinnato, D. ; Cornella, J. unpublished results[8] Magre, M. Cornella, J. J. Am. Chem. Soc. 2021, 143, 21497.
- 2022년 9월 29일(목) 오후 4시 30분
- Webex
- POSTED DATE : 2022-09-22
- WRITER : 화학과
- HIT : 1872
High-Performance Receptonics as NanoBio Sensors

세미나가 이번주 목요일(9월 22일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다. ===============================================================================제 목 : High-Performance Receptonics as NanoBio Sensors연 사 : 권오석 박사님(KRIBB)일 시 : 2022년 9월 22일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실================================================================================ High-Performance Receptonics as NanoBio SensorsOh Seok Kwon Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of KoreaOne of the recently emerging topics in biotechnology is natural receptors including G protein-coupled receptors, ligand-gated ion channels, enzyme-linked receptors, and intracellular receptors, owing to their molecular specificity. These receptors, other than intracellular receptors, which are membrane proteins expressed on the cell membrane, can detect extracellular stimuli. Therefore, integration of conducting nanomaterials and natural receptors, as we called Receptonics, allows highly sensitive and selective responses toward target molecules such as cadaverine, geosmin, biocides and so on. Moreover, the receptonics can provide "False-Negative Zero" technologies in the field of virus detection. Based on their unique characteristics in the field of biosensors, the receptonics enable to provide next-generation diagnostics as NanoBio sensors.Keyword: Portable receptonics, graphene, field-effect transistor, NanoBio Sensors
- 2022년 9월 22일(목) 오후 4시 30분
- 330226호실
- POSTED DATE : 2022-09-20
- WRITER : 화학과
- HIT : 1569
Introduction of solid-state NMR and its application on polyanion based cathode materials for Li-ion battery

세미나가 다음주 목요일(9월 15일) 오후 4시 30분에 개최됩니다.많은 참여 부탁드립니다. * 이번학기 세미나는 별도 공지가 없는 한 오프라인 세미나로 진행됩니다.===============================================================================제 목 : Introduction of solid-state NMR and its application on polyanion based cathode materials for Li-ion battery연 사 : 이영일 교수(울산대학교)일 시 : 2022년 9월 15일(목) 오후 4시 30분장 소 : 화학관 2층 330226호실================================================================================Introduction of solid-state NMR and its application on polyanion based cathode materials for Li-ion battery Youngil Lee Department of Chemistry, University of Ulsan, Ulsan 44776, Korea.E-mail: nmryil@ulsan.ac.kr The solid-state NMR spectroscopy is a powerful tool to understand the local structure of electrodes for lithium ion battery (LIB), but not well known technique in the field of developing new electrodes due to difficulties of experimental setup and spectral interpretation. Herein, the background of solid-state NMR for observation of quadrupole nuclei will be discussed and its applications for various cathode materials of LIB explained. The substitution effect of anion on polyanion based cathode materials for LIB, such as LiFePO4 and LiFeBO3, will be dealt with their characterizations including solid-state NMR spectroscopy.
- 2022년 9월 15일(목) 오후 4시 30분
- 330226호실
- POSTED DATE : 2022-09-08
- WRITER : 화학과
- HIT : 1585
Application of Density Functional Theory to the Exploration of Reactions

특별 세미나가 다음주 수요일(9월 14일) 오전 10시 30분에 개최됩니다.많은 참여 부탁드립니다. (장소는 반도체관 400102호실입니다.)* 이번학기 세미나는 별도 공지가 없는 한 오프라인 세미나로 진행됩니다.===============================================================================제 목 : Application of Density Functional Theory to the Exploration of Reactions연 사 : Gisela A. González-Montiel(Oregon State University)일 시 : 2022년 9월 14일(수) 오전 10시 30분장 소 : 반도체관 1층 400102호================================================================================Gisela A. González-Montiel Title: Application of Density Functional Theory to the Exploration of Reactions Abstract: Density Functional Theory (DFT) is extensively applied for the elucidation of reaction mechanisms and to determine the origins in selectivities of such reactions. As a powerful computational tool, DFT has made considerable advances in organic chemistry to understand the molecular structure and the reaction pathways by estimation of the electronic and geometrical properties of compounds. This talk will highlight research interests in catalyzed organic reactions to determine the mechanism and factors that control the observed selectivities through DFT optimization investigations. In particular, focus will be on the mechanistic studies of an Indium(III)-catalyzed regioselective synthesis of 1-naphthaldehyde derivatives and a light-driven carbene catalysis for the synthesis of aliphatic and alpha-amino ketones. These studies will showcase how DFT is almost imperative for the fundamental understanding of diverse experimental studies. Bio: Gisela A. González-Montiel was born and raised in Portland, Oregon, USA. As a young woman in science and a first-generation student, Gisela graduated from the University of Portland with a B.S. in chemistry in 2016. She then attended graduate school at Oregon State University where she earned her M.S. in chemistry in 2019 under the mentorship of Dr. Sandra Loesgen in the field of fungal natural products. She continued her career at OSU in pursuit of a higher education as a Ph.D. student in the field of computational organic chemistry under the mentorship of Dr. Paul Ha-Yeon Cheong. Her research focuses on computational theory and elucidation of reaction mechanisms in organic chemistry and exploration of origins of selectivity. Gisela is fluent in Spanish and English.
- 2022년 9월 14일(수) 오전 10시 30분
- 반도체관 1층 400102호
- POSTED DATE : 2022-09-08
- WRITER : 화학과
- HIT : 1513