A5100350569- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Photochemistry and Electron Transfer Studies
- Molecular Spectroscopy and Structure
- Laser-Matter Interactions and Applications
- Quantum chaos and dynamical systems
- Atmospheric Ozone and Climate
- DNA and Nucleic Acid Chemistry
- Geophysics and Sensor Technology
- Polymer Surface Interaction Studies
- Scientific Measurement and Uncertainty Evaluation
- Protein purification and stability
- Advanced Proteomics Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Analytical Chemistry and Chromatography
- Chemical Reaction Mechanisms
- Spectroscopy and Laser Applications
- Bladed Disk Vibration Dynamics
- Mass Spectrometry Techniques and Applications
- Advanced Frequency and Time Standards
Cheongju National University of Education
2023
Korea National University of Education
2023
Korea Research Institute of Chemical Technology
2021
Korea Advanced Institute of Science and Technology
2013-2020
LG Chem (South Korea)
2020
Kootenay Association for Science & Technology
2017-2019
Government of the Republic of Korea
2017-2019
Daejeon University
2017-2019
The dynamic interplay between the intramolecular hydrogen bonding and vibrational redistribution is found to be critical in nonadiabatic reaction dynamics. Herein, it has been demonstrated that molecular planarity, directed by bonding, plays an important role passage of reactive flux at conical intersection photodissociation reactions 2-fluorothiophenol 2-chlorothiophenol. As internal energy increases excited state, loosens. floppiness brought into structure then modifies path flux, leading...
Herein, the multi-dimensional nature of conical intersection seam has been experimentally revealed in photodissociation reaction thioanisole-d3 (C6H5SCD3) excited on S1, giving C6H5S·(${\rm \tilde A}$Ã or ${\rm X}$X̃) +·CD3 products. The translational energy distribution nascent·CD3 fragment, reflecting relative yields A}$Ã) and products, was measured at each S1 vibronic band using velocity map ion imaging technique. Direct access reactant flux to leads increase nonadiabatic transition...
The surface crossing of bound and unbound electronic states in multidimensional space often gives rise to resonances the continuum. This situation happens πσ*-mediated photodissociation reaction 2-fluorothioanisole; optically-bright S
In this work, we have investigated nonadiabatic dynamics in the vicinity of conical intersections for predissociation reactions partially deuterated thioanisole molecules: C6H5S-CH2D and C6H5S-CHD2. Each isotopomer has two distinct rotational conformers according to geometrical position D or H methyl moiety with respect molecular plane C6H5S-CHD2, respectively, as spectroscopically characterized our earlier report [J. Lee, S.-Y. Kim S. K. Kim, J. Phys. Chem. A, 2014, 118, 1850]. Since...
Two distinct rotational isomers of thioanisole-d1 (C6H5S-CH2D) and thioanisole-d2 (C6H5S-CHD2) with respect to the internal rotation methyl moiety have been identified characterized spectroscopically using resonantly enhanced two photon ionization, UV-UV hole burning, slow-electron velocity map imaging techniques. From statistical weights, definite assignment for specific isomer each isotopomer has successfully done, providing isomer-specific ionization energies vibrational frequencies S1/D0...
Vibronic spectroscopy and the S–H bond predissociation dynamics of 2-methoxythiophenol (2-MTP) in S1 (ππ*) state have been investigated for first time. Resonant two-photon ionization slow-electron velocity map imaging (SEVI) spectroscopies revealed that S1–S0 transition 2-MTP is accompanied with planar to pseudoplanar structural change along out-of-plane ring distortion tilt methoxy moiety. The vibronic bands up their internal energy ∼1000 cm−1 are assigned from SEVI spectra taken via...
Multidimensional conical intersection seam has been characterized by utilizing the dynamic resonances in nonadiabatic transition probability experimentally observed predissociation of thioanisole isotopomers.
Trans and cis conformers of 3-methylthioanisole have been spectroscopically investigated to reveal the conformer specific structural changes upon S1(ππ*)–S0 excitation. The conformational cooling during supersonic expansion is found be quite efficient in Ar carrier gas giving trans isomer exclusively molecular beam, whereas both are populated jet when sample carried Ne. Using Stark deflector, unambiguously identified, showing distinct deflection profiles according their sufficiently...
When the molecule in excited state is subject to prompt predissociation, it quite nontrivial obtain vibrational structure of general. This applies case photochemistry dimethylamine (DMA:<TEX>$(CH_3)_2NH$</TEX>). DMA its first electronically (<TEX>$S_1$</TEX>), N-H bond dissociation occurs promptly. Therefore, <TEX>$S_1$</TEX> vibronic bands are homogeneously broadened give extremely small ionization cross sections and heavily-congested spectral features, making infeasible any reasonable...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Jae June Noh, Soyeon Kim, Jung Bog Kim; Measurement of Young's Modulus Using a Michelson Interferometer. Phys. Teach. 1 October 2023; 61 (7): 618–620. https://doi.org/10.1119/5.0078993 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search...