A5038230179- Organic Light-Emitting Diodes Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic Electronics and Photovoltaics
- Liquid Crystal Research Advancements
- CO2 Reduction Techniques and Catalysts
- Ionic liquids properties and applications
- Conducting polymers and applications
- Organoboron and organosilicon chemistry
- Organometallic Complex Synthesis and Catalysis
- Advanced Thermoelectric Materials and Devices
- Luminescence and Fluorescent Materials
- Electrocatalysts for Energy Conversion
- ZnO doping and properties
- Advancements in Solid Oxide Fuel Cells
- Synthesis and Properties of Aromatic Compounds
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Nonlinear Dynamics and Pattern Formation
- Gas Sensing Nanomaterials and Sensors
- Molecular spectroscopy and chirality
- TiO2 Photocatalysis and Solar Cells
- Covalent Organic Framework Applications
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
Jeonbuk National University
2023
Johns Hopkins University
2018
University of Baltimore
2018
Korea Advanced Institute of Science and Technology
2008-2013
Seoul National University
2006-2013
Korea Research Institute of Chemical Technology
2006
The local pH on electrode surfaces is known to play an important role in the electrochemical reduction of CO2, which could alter chemical kinetics and molecular transport under reaction conditions. Here we report study effect catalytic performance high-surface-area Cu electrocatalysts. electroreduction CO2 was systematically investigated three types nanowires with distinct surface roughness factors nanostructures. measured electrocatalytic activities selectivities were further correlated...
Mass transfer effects play an important role in CO<sub>2</sub> electroreduction, giving rise to diffusion-limited activity and selectivity on Cu nanowire electrocatalysts.
Ethanol represents a promising liquid energy source for fuel cells. The development of direct ethanol cells (DEFCs) is however challenged by the lack efficient electrocatalysts complete oxidation to CO2. Here we report investigation electro-oxidation on monodisperse and homogeneous Pt3Sn alloy nanoparticles. Electrochemical studies were conducted comparatively nanoparticles supported carbon (Pt3Sn/C), commercial Pt/C catalyst, as well KOH-treated Pt3Sn/C with surface tin species removed. Our...
[reaction: see text] 1,3,5-Trisacetoacetamidobenzene with three 1,3-diketo groups was synthesized by the reaction of 1,3,5-triaminobenzene diketene. Discotic hydrazone compounds were prepared diazo coupling between 1,3,5-trisacetoacetamidobenzene and diazonium salts 4-alkyloxyphenylamines. The existed in forms exclusively, being stabilized intramolecular hydrogen bonds, showed discotic nematic or columnar hexagonal mesophases.
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTVinyl-Type Polynorbornenes with Triarylamine Side Groups: A New Class of Soluble Hole-Transporting Materials for OLEDsJun Ha Park†, Changhun Yun‡, Myung Hwan Youngkyu Do*†, Seunghyup Yoo*‡, and Min Hyung Lee*§View Author Information† Department Chemistry, KAIST, Daejeon 305-701, Republic Korea‡ Electrical Engineering, Korea§ University Ulsan, Ulsan 680-749, Korea*Corresponding authors. E-mail: [email...
Vinyl addition copolymerization of norbornene monomers using a Pd(II) catalyst in combination with 1-octene chain transfer agent efficiently produces well-defined soluble polynorbornene copolymers bearing side-chain (C∧N)2Ir(O∧O) emitters (C∧N = 2-(4,6-difluorophenyl)-pyridine (M3); 2-phenyl-pyridine (M4); 2-(benzo[b]thiophen-2-yl)-pyridine (M5), O∧O acetylacetonato) and 9,9′-(1,3-phenylene)bis-9H-carbazole (mCP) or 9,9′-(1,1′-biphenyl)-4,4′-diylbis-9H-carbazole (CBP) host moieties (M1 M2)....
The soluble polynorbornene (P1) bearing 9,9′-(1,1′-biphenyl)-4,4′-diylbis-9H-carbazole (CBP) side groups was investigated as a host material for green emitters in phosphorescent OLED devices. vinyl addition polymerization of norbornene monomers using Pd(II) catalyst efficiently produces P1 combination with 1-octene chain transfer agent. exhibits high thermal stability decomposition (Td5 > 451 °C) and glass transition temperatures (Tg 361 °C). HOMO (ca. −5.5 eV) LUMO −2.1 levels the triplet...
Discotic hydrazone molecules are of particular interest as they form discotic phases where the discs rigidified by intramolecular hydrogen bonds. Here, we investigate thermotropic behavior and solid-state organizations three derivatives with dendritic groups attached to their outer peripheries, containing six, eight, ten carbons linear alkoxy chains. On basis two-dimensional wide angle X-ray scattering (2DWAXS), elevated temperature liquid crystalline (LC) were assigned a hexagonal columnar...
Cu-based nanomaterials have received increasing interest for electrocatalytic applications in the CO2 reduction reaction. However, it is challenging to design nanostructured Cu electrodes improve both chemical kinetics and molecular transport under reaction conditions. Here we report on a new type of three-dimensional nanostructures as advanced electrocatalysts reduction. Driven by thermal oxidation, CuO nanowires and/or porous are grown commercial foams with (3D) frameworks. An...
Abstract We report novel host polymers for a high‐efficiency polymer‐based solution‐processed phosphorescent organic light‐emitting diode with typical blue‐emitting dopant bis(4,6‐difluorophenylpyridinato‐N,C 2 )iridium(III) picolinate (FIrpic). The polymers, soluble polynorbornenes pendant carbazole derivatives, N ‐phenyl‐9 H ‐carbazole ( P1 ), ‐biphenyl‐9 P2 and 9,9′‐(1,3‐phenylene)bis‐9 (mCP) P3 ) are efficiently synthesized by vinyl addition polymerization of norbornene monomers using...
A series of ortho or meta Lewis base functionalized unbridged zirconocenes, [{1-(E(n)-Ph)-3,4-Me(2)C(5)H(2)}(2)ZrCl(2)] (E = NMe(2), OMe; n 1, 2), and a half-functionalized zirconocene, [{1-(p-Me(2)NC(6)H(4))-3,4-Me(2)C(5)H(2)}{1-(p-tolyl)-3,4-Me(2)C(5)H(2)}ZrCl(2)], were prepared. The crystal structures these compounds determined by X-ray diffraction revealed the presence only C(2)-symmetric rac-like isomers in asymmetric units. In combination with methylaluminoxane (MAO) cocatalyst,...