Search Results - "Lim, Jeong Sik"

Theoretical Investigation of the Reaction Mechanism of the Photoisomerization of 1,2-Dihydro-1,2-azaborine by Kim, Joonghan, Moon, Jiwon, Lim, Jeong Sik

“…The photoisomerization of 1,2‐dihydro‐1,2‐azaborine was investigated by high‐level multireference ab initio and density functional theory calculations. The…”
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TDDFT and MS-CASPT2 Study of the Excited States of Para-Methoxymethylcinnamate by Moon, Jiwon, Baek, Heehyun, Lim, Jeong Sik, Kim, Joonghan

“…The vertical and adiabatic excitation energies of the ${\pi}{\pi}^*$, ${\pi}{\pi}^*^{\prime}$, and $n{\pi}^*$ states of the trans and cis isomers of…”
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Detachable Trap Preconcentrator with a Gas Chromatograph–Mass Spectrometer for the Analysis of Trace Halogenated Greenhouse Gases by Yoon, Doohyun, Lee, Jeongsoon, Lim, Jeong Sik

“…A detachable trap preconcentrator coupled with a gas chromatograph–mass spectrometer (GC-MS) was developed for measuring trace amounts of anthropogenic…”
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Multi-Gas Analyzer Based on Tunable Filter Non-Dispersive Infrared Sensor: Application to the Monitoring of Eco-Friendly Gas Insulated Switchgears by Kim, Yera, Goo, Sun-Geun, Lim, Jeong Sik

“…This study presents a multi-gas analyzer based on tunable filter non-dispersive IR (TF-NDIR) sensors that operate with a wide dynamic range of wavelength and…”
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Experimental probing of conical intersection dynamics in the photodissociation of thioanisole by Lim, Jeong Sik, Kim, Sang Kyu

“…Chemical reactions that occur in the ground electronic state are described well by invoking the Born–Oppenheimer approximation, which allows their development…”
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Approximated Uncertainty Propagation of Correlated Independent Variables Using the Ordinary Least Squares Estimator by Lim, Jeong Sik, Kim, Yong Doo, Woo, Jin-Chun

“…For chemical measurements, calibration is typically conducted by regression analysis. In many cases, generalized approaches are required to account for a…”
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Add-On Device Powered by Parallelized Adsorption Traps for Preconcentrator-GC–MS Measurement of sub-pmol/mol Levels of NF3 by Lim, Jeong Sik, Yoon, Doohyun, Kim, Taewan, Lee, Jinbok

“…In this study, an add-on preconcentration device powered by parallelized pretraps (PPTs) was utilized to measure the sub-pmol/mol levels of NF3 in N2. The…”
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Observations of atmospheric 14CO2 at Anmyeondo GAW station, South Korea: implications for fossil fuel CO2 and emission ratios by Lee, Haeyoung, Dlugokencky, Edward J, Turnbull, Jocelyn C, Lee, Sepyo, Lehman, Scott J, Miller, John B, Pétron, Gabrielle, Jeong-Sik Lim, Gang-Woong, Lee, Sang-Sam, Lee, Young-San, Park

“…To understand the Korean Peninsula's carbon dioxide (CO2) emissions and sinks as well as those of the surrounding region, we used 70 flask-air samples…”
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Validation of spectroscopic gas analyzer accuracy using gravimetric standard gas mixtures: impact of background gas composition on CO2 quantitation by cavity ring-down spectroscopy by Lim, Jeong Sik, Park, Miyeon, Lee, Jinbok, Lee, Jeongsoon

“…The effect of background gas composition on the measurement of CO2 levels was investigated by wavelength-scanned cavity ring-down spectrometry (WS-CRDS)…”
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Control of Intramolecular Orbital Alignment in the Photodissociation of Thiophenol: Conformational Manipulation by Chemical Substitution by Lim, Jeong Sik, Lee, Yoon Sup, Kim, Sang Kyu

“…Intramolecular orbital alignment can be controlled by conformational tuning of the initial wavepacket location on the two‐dimensional potential‐energy surfaces…”
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TDDFT and MS‐CASPT2 Study of the Excited States of Para‐Methoxymethylcinnamate by Moon, Jiwon, Baek, Heehyun, Lim, Jeong Sik, Kim, Joonghan

“…The vertical and adiabatic excitation energies of the ππ*, ππ*′, and nπ* states of the trans and cis isomers of para‐methoxymethylcinnamate (p‐MMC) were…”
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Photodissociation Dynamics of the Thiophenoxy Radical at 248, 193, and 157 nm by Harrison, Aaron W, Lim, Jeong Sik, Ryazanov, Mikhail, Wang, Gregory, Gao, Shumin, Neumark, Daniel M

“…The photodissociation dynamics of the thiophenoxy radical (C6H5S) have been investigated using fast beam coincidence translational spectroscopy. Thiophenoxy…”
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Coarsely scannable comb-locked ECDL with fixed local oscillator for CRDS measurement of CO line strength by Kim, Yera, Soo Han, Noh, Lim, Jeong Sik

“…This study introduces a simplified method for scanning the optical frequency of an external cavity diode laser (ECDL) locked to an optical frequency comb (OFC)…”
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Isotope ratios of total C, N, and S in particulate matter simultaneously calibrated by mixed USGS and IAEA reference materials by Lim, Jeong Sik, Yim, Yong-Hyeon

“…This study presents a method for calibrating the isotope ratios of the total carbon, nitrogen, and sulfur in particulate matter (PM) collected from the Seoul…”
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Review of Gas-Chromatographic Measurement Methodologies for Atmospheric Halogenated Greenhouse Gases by Han, Noh Soo, Lim, Jeong Sik

“…Gas chromatography (GC) is crucial for measuring atmospheric halogenated greenhouse gases (hGHGs), usually coupled with electron capture detector (ECD, with…”
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Multipoint normalization of δ18O of water against the VSMOW2-SLAP2 scale with an uncertainty assessment by Kim, Taewan, Lee, Jeongsoon, Lim, Jeong Sik

“…In this study, we measured the oxygen stable isotope ratio of drinking water using gas chromatography isotope ratio mass spectrometry. The δ18O value of…”
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Measurement report: Radiative efficiencies of (CF 3 ) 2 CFCN, CF 3 OCFCF 2 , and CF 3 OCF 2 CF 3 by Trisna, Beni Adi, Park, Seungnam, Park, Injun, Lee, Jeongsoon, Lim, Jeong Sik

“…Absorption cross sections of emerging greenhouse gases (GHGs) were measured to estimate the radiative efficiency using high-resolution Fourier transform…”
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Measurement report: Radiative efficiencies of .sub.2CFCN, CF.sub.3OCFCF.sub.2, and CF.sub.3OCF.sub.2CF.sub.3 by Trisna, Beni Adi, Park, Seungnam, Park, Injun, Lee, Jeongsoon, Lim, Jeong Sik

“…Absorption cross sections of emerging greenhouse gases (GHGs) were measured to estimate the radiative efficiency using high-resolution Fourier transform…”
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Photochemical Reaction Mechanism of Intramolecular H Transfer Reaction of H2C3O+⋅ Radical Cation by Kim, Joonghan, Oh, Dakyeung, Park, Eunji, Park, Jeongmin, Kim, Jungyoon, Lim, Jeong Sik

“…The photochemical reaction mechanism underlying the intramolecular H‐transfer of the H2C3O+⋅ radical cation to the H2CCCO+⋅ methylene ketene cation was…”
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Cover Feature: Photochemical Reaction Mechanism of Intramolecular H Transfer Reaction of H2C3O+⋅ Radical Cation (ChemPhysChem 13/2023) by Kim, Joonghan, Oh, Dakyeung, Park, Eunji, Park, Jeongmin, Kim, Jungyoon, Lim, Jeong Sik

“…The Cover Feature shows that the H2C3O+• radical cation undergoes isomerization to H2CCCO+• via a conical intersection. The gradient difference vector…”
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