A5103131517- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Supramolecular Chemistry and Complexes
- Supramolecular Self-Assembly in Materials
- Material Dynamics and Properties
- Crystallography and molecular interactions
- Mechanical and Optical Resonators
- Ultrasonics and Acoustic Wave Propagation
- Luminescence and Fluorescent Materials
- High-pressure geophysics and materials
- Ferroelectric and Piezoelectric Materials
- Covalent Organic Framework Applications
- Force Microscopy Techniques and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Acoustic Wave Phenomena Research
- Air Traffic Management and Optimization
- Mechanical Behavior of Composites
- Chemical Synthesis and Analysis
- Polydiacetylene-based materials and applications
- Radical Photochemical Reactions
- Fire effects on concrete materials
- Advanced Polymer Synthesis and Characterization
- Porphyrin and Phthalocyanine Chemistry
- Electrical Fault Detection and Protection
Institute for Basic Science
2014-2023
Jeonbuk National University
2017-2022
Government of the Republic of Korea
2018
Agency for Defense Development
2010-2017
Daewoo Shipbuilding and Marine Engineering (South Korea)
2007-2014
Korea Institute of Industrial Technology
2007
Soongsil University
2007
Pohang University of Science and Technology
2001
The porphyrin boxes (PB-1 and PB-2), which are rationally designed porous organic cages with a large cavity using well-defined rigid 3-connected triangular 4-connected square shaped building units reported. PB-1 has as 1.95 nm in diameter shows high chemical stability broad pH range (4.8 to 13) aqueous media. crystalline nature well structure of the shape-persistent cage crystals were intact even after complete removal guest molecules, leading one highest surface areas (1370 m(2) g(-1))...
The design and synthesis of two-dimensional (2D) polymers is a challenging task, hitherto achieved in solution only through the aid solid surface "template" or preorganization building blocks 2D confined space. We present novel approach for synthesizing free-standing, covalently bonded, single-monomer-thick without any on surfaces interfaces by employing shape-directed covalent self-assembly rigid, disk-shaped having laterally predisposed reactive groups their periphery. demonstrate our...
We report a new approach to building hierarchical superstructures using shape-persistent porous organic cage, which acts as premade secondary unit, and coordination chemistry. To illustrate the principle, zinc-metalated porphyrin box (Zn-PB), corner-truncated cubic was connected by suitable dipyridyl terminated bridging ligands construct PB-based (PSSs). The PSSs were stabilized not only bonds between Zn ions bipyridyl-terminated but also π–π interactions corners of Zn-PB units. By varying...
The confinement of molecular machines into nanostructured cages and controlling their functions by external stimuli holds great potential for the creation smart functional materials that imitate embodied intelligence biological processes. Herein, we report construction a supramolecular rotor in porous Zn-metallated porphyrinic cage (1) encapsulation tetrazine-based linear axle (LA) via metal-ligand coordination bond, followed post-assembly modification to append controllable side arm LA...
Abstract The porphyrin boxes ( PB‐1 and PB‐2 ), which are rationally designed porous organic cages with a large cavity using well‐defined rigid 3‐connected triangular 4‐connected square shaped building units reported. has as 1.95 nm in diameter shows high chemical stability broad pH range (4.8 to 13) aqueous media. crystalline nature well structure of the shape‐persistent cage crystals were intact even after complete removal guest molecules, leading one highest surface areas (1370 m 2 g −1 )...
Abstract We present covalently self‐assembled peptide hollow nanocapsule and lamella. These biomimetic dityrosine nanostructures are synthesized by one‐step photopolymerization of a tyrosine‐rich short without the aid template. This simple approach offers direct synthesis fluorescent nanocages free‐standing thin films. The crosslinked lamella films provide robust mechanical properties with an elastic modulus approximately 30 GPa hardness 740 MPa. also allow for design peptidosomes. taken...
Abstract Serendipitously, mono‐allyloxylated cucurbit[7]uril (AO 1 CB[7]) was discovered to act as an unconventional amphiphile which self‐assembles into light‐responsive vesicles CB[7]VC) in water. Although the mono‐allyloxy group, directly tethered on periphery of CB[7], is much shorter (C4) than hydrophobic tails conventional amphiphiles, it played important role vesicle formation. Light‐activated transformation allyloxy group by conjugation with glutathione exploited a remote tool...
Inverse-electron-demand Diels-Alder reaction (IEDDA) between fullerenes and 1,2,4,5-tetrazine generally requires harsh conditions long times due to their strong electron-accepting nature. Herein, we report a dramatic enhancement in the reactivity of (C60 /C70 )-tetrazine inside porous Zn-porphyrinic cage (Zn-PB) under sustainable by installing tetrazine-based axle (LA) via metal-ligand coordination bond, which modulates cavity size facilitate encapsulation fullerenes. Upon encapsulation,...
Abstract The host-guest complexes between commercially available fluorescence dyes and cucurbit[n]urils (CB[n], n = 6, 7 8) were exploited as multiple sensor elements to provide arrays for sensing biogenic amines using principal component analysis (PCA). Since the respond differently each amine, array generates distinct patterns of changes amine. We analyzed these results PCA allow precise discrimination individual amines. This result demonstrated great potential useful molecules, which may...
Brillouin spectroscopy has been widely used for the investigation of acoustic properties condensed matters in hypersonic region. A high-pressure spectrometer was set up by combining a diamond anvil cell and tandem multi-pass Fabry-Perot interferometer. It successfully applied to liquid ethanol, pressure dependence sound velocity, refractive index other were derived based on measurements. The detailed optical setup experimental procedure are described.
A spider with mussel: a supramolecular fiber formed by dragline protein was tuned to have underwater adhesion property genetic fusion of mussel foot protein.
A rationally designed supramolecular FRET pair consisting of cyanine3-cucurbit[7]uril (Cy3-CB[7]) and boron-dipyrromethene 630/650-adamantylammonium (BDP-AdA) can be used to visualize organelle-specific autophagy events. The intracellular accumulations Cy3-CB[7] in lysosomes BDP-AdA lipid droplets (LDs) the formation an host-guest complex between resulting signals allow us fusion LDs with lysosomes, namely, lipophagy. This study demonstrates potential imaging based on bio-orthogonal...
Surface atom stoichiometry is controlled for Ag2S NCs through ion-pair ligand-assisted surface reactions. Predominantly cation-rich-surfaced (Ag-Ag2S), anion-rich-surfaced (S-Ag2S), and perfectly stoichiometric (st-Ag2S) are prepared. Various combinations of cation anion pairs studied NC Depending on the hardness/softness ligands, shows disparate reactions (i) X-type replacing native X- L-type (ii) binding as whole ligand, (iii) one-to-one exchange by positive ligand. Ion-pair-assisted...
The direct addition of tetracyanoethylene (TCNE) to the carbene center 1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene (IPr) was successfully demonstrated. IPr–TCNE adduct, that is, zwitterion 1 , clearly differs from typical [2+1]‐cycloaddition products obtained reaction carbenes with olefins. results experimental and theoretical studies suggest adduct disassembles into IPr TCNE, which is followed by nitrile carbon atom TCNE subsequent isomerization a thermodynamically more stable singlet...
Acoustic properties of antiferroelectric (AFE) PbZr0.72Sn0.28O3 single crystals were investigated in a wide temperature range by Brillouin light scattering spectroscopy. The frequency shift the longitudinal acoustic (LA) mode exhibited three abrupt changes corresponding to successive phase transitions between paraelectric, intermediate, (AFE2) and (AFE1) phases upon cooling. change LA damping maximum much higher than those pure PbZrO3. This was attributed enhanced polarization fluctuations...
The polyethylene terephthalate (PET) substrate is one of the key materials comprising optical films, which are essential components in various devices, such as displays. elastic properties oriented PET were investigated via Brillouin light scattering spectroscopy. high-frequency longitudinal and transverse sound velocities hypersonic region determined using a special right-angle geometry, where information refractive index was not included calculation. When propagation direction acoustic...
Abstract Molten marks identified at a fire site can aid in determining the cause of fire. Quantitative analysis such molten has not yet been reported, despite several identification methods for being proposed based on optical micrographs. Herein, we propose new methodology to establish quantitative microstructure parameters using electron backscatter diffraction (EBSD). The globules were generated by heating copper conductor 1100°C non-energized state. Then, arc beads prepared shorting wire...