pISSN : 0253-2964 / eISSN : 1229-5949
About BKCS
A Message from our Editor-in-Chief
Papers since 2015 are available from Wiley.
(Bulletin of the Korean Chemical Society: List of Issues - Wiley Online Library)
The Bulletin of the Korean Chemical Society (BKCS) is a monthly journal and publishes communications, articles, accounts and reviews in all fields of chemistry, including analytical, electro-, industrial, inorganic, life-science, macromolecular, organic, physical and materials chemistry. The BKCS is published on behalf of the Korean Chemical Society (KCS).
A Message from our Editor-in-Chief
Prof. Wonwoo Nam is the Editor-in-Chief of the flagship journal of the Korean Chemical Society, which provides the opportunity to share new findings in all chemical sciences.
Our BKCS editorial teams also continue our publishing services. Thus, if you have any concerns about the publishing process, please contact the corresponding editorial office without hesitation.
Papers since 2015 are available from Wiley.
(Bulletin of the Korean Chemical Society: List of Issues - Wiley Online Library)
Latest Publication (Vol. 35, No. 12, Dec. 2014)
Nanocomposites Based on Polytetrafluoroethylene and Ultrahigh Molecular Weight Polyethylene: A Brief Review
Iu. V. Kirillina L. A. Nikiforov A. A. Okhlopkova S. A. Sleptsova Cheonho Yoon Jin-Ho Cho
Deficiencies in wear and frost resistance as well as mechanical strength constitute the main causes of equipment failure under the harsh climatic conditions of the Earth’s polar regions. To improve the properties of the materials used in this equipment, nanoparticle composites have been prepared from clays such as kaolinite, hectorite, and montmorillonite in combination with polytetrafluoroethylene (PTFE) or ultrahigh molecular weight polyethylene (UHMWPE). A number of techniques have been proposed to disperse silicate particles in PTFE or UHMWPE polymer matrices, and several successful processes have even been widely applied. Polymer nanocomposites that exhibit enhanced mechanical and thermal properties are promising materials for replacing metals and glass in the equipment intended for Arctic use. In this article, we will review PTFE- and UHMWPE-based layered silicate nanocomposites.
Improvement in Plume Dispersion Formulas for Stack Emissions Using Ground-based Imaging-DOAS Data
Hanlim Lee Jaeyong Ryu Ukkyo Jeong Youngmin Noh Sung Kyun Shin Hyunkee Hong Soonchul Kwon
This study introduces a new method of combining Imaging Differential Optical Absorption Spectroscopy (Imaging-DOAS) data and plume dispersion formulas for power plant emissions to determine the threedimensional structure of a dispersing pollution plume and the spatial distributions of trace gas volume mixing ratios (VMRs) under conditions of negligible water droplet and aerosol effects on radiative transfer within the plume. This novel remote-sensing method, applied to a power plant stack plume, was used to calculate the twodimensional distributions of sulfur dioxide (SO2) and nitrogen dioxide (NO2) VMRs in stack emissions for the first time. High SO2 VMRs were observed only near the emission source, whereas high NO2 VMRs were observed at locations several hundreds of meters away from the initial emission. The results of this study demonstrate the capability of this new method as a tool for estimating plume dimensions and trace gas VMRs in power plant emissions.
Synthesis of Piperidones from Benzyl Azides and Acetone
Junghoon Han Young Ho Rhee Jaiwook Park
A new method for the synthesis of 2,2-dimethyl-6-substituted 4-piperidone was developed; two equivalents of acetone were annulated with N-unsubstituted imines in-situ generated from benzyl azides using a ruthenium catalyst in the presence of L-proline.
A Carbazole Based Bimodal “Turn-On” Fluorescent Probe for Biothiols (Cysteine/Homocysteine) and Fluoride: Sensing, Imaging and its Applications
Matinder Kaur Byungkwon Yoon Rajesh Kumar Min Ju Cho Hak Joong Kim Jong Seung Kim Dong Hoon Choi
A well-known carbazole-based precursor (probe 1) was used for the detection of cysteine/homocysteine and fluoride. Probe 1 shows a “turn-on” response to cysteine/homocysteine and fluoride via enhancement in emission intensity at 442 nm and 462 nm respectively, in solutions and living cells. Furthermore, probe 1 behaves as a fluorescent molecular switch between cysteine/homocysteine and fluoride as the chemical inputs, which have been used for the development of a combinatorial logic circuit and a molecular keypad lock.
Solution of Klein Gordon Equation for Some Diatomic Molecules with New Generalized Morse-like Potential Using SUSYQM
Cecilia N. Isonguyo Ituen B. Okon Akpan N. Ikot Hassan Hassanabadi
We present the solution of Klein Gordon equation with new generalized Morse-like potential using SUSYQM formalism. We obtained approximately the energy eigenvalues and the corresponding wave function in a closed form for any arbitrary l state. We computed the numerical results for some selected diatomic molecules.
A New Flavonol Glycoside from the Leaves of Boscia senegalensis
Abubaker M. A. Morgan Jang Hoon Kim Sang Kyum Kim Chi-Hwan Lim Young Ho Kim
Detailed chemical investigation of Boscia senegalensis (Per) Lam. ex Poir. led to the isolation of one new flavonol glycoside, rhamnocitrin-3-O-β-D-(6''-O-E-feruloyl)-glucopyranoside named bosenegaloside A (1), with seven known compounds, rhamnocitrin-3-O-β-D-(6''-O-E-p-coumaroyl)-glucopyranoside (2), rhamnocitrin- 3-O-β-D-glucopyranoside (3), 3,4,5-trimethoxyphenol-β-D-glucopyrinoside (4), lasianthionoside A (5), 3,7- dimethyl-1-octene-3,6,7-triol-6-O-β-D-glucopyranoside (6), syringin (7), and austroside B (8). The chemical structures of these compounds were elucidated from spectroscopic data and by comparison of these data with previously published results. The inhibitory activity of the isolated compounds on soluble epoxide hydrolase (sEH) was assessed. Compounds 1-3 potently inhibited sEH activity with IC50 values of 12.8 ± 0.5, 18.4 ± 0.2, and 11.3 ± 0.9 μM, respectively.
Facile Synthesis of Natural Moracin Compounds using Pd(OAc)2/P(tBu)3-HBF4 as a Sonogashira Coupling Reagent
Jae Jun Lee So-Ra Yun Jong-Gab Jun
An efficient and practical synthesis of natural moracins, which have diverse range of biological properties including anticancer, antioxidant, and antibacterial activities, has been achieved using Pd(OAc)2/P(tBu)3-HBF4 as a Sonogashira coupling reagent which solved the unreactive problems in case of higher electron density of haloaryl compounds in the reaction. Lowering electron density of halophenol with acetylation and changing Sonogashira coupling reagent from PdCl2(PPh3)2 to Pd(OAc)2/P(tBu)3-HBF4 smoothly produce the benzofuran structures in the syntheses of moracins M, N and S. The electron deficient halobenzaldehyde, however, easily forms the benzofuran using original Sonogashira conditions, and utilized for the first synthesis of moracin Y.
ISSN(Print) 0253-2964
ISSN(Online) 1229-5949
