Chil Hoon Doh

Korea Electrotechnology Research Institute

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Sang Chul Shim

Kyungpook National University

Won Jae Lee

Dong-Eui University

Young Gil Kwon

Kyungpook National University

Bong Soo Jin

Korea Electrotechnology Research Institute

Geun Ho Go

Korea Electrotechnology Research Institute

Byung Won Woo

Kyungpook National University

Pravin S. Shinde

University of Alabama

Myoung Gyu Ha

Kyungnam University

Euh Duck Jeong

Korea Basic Science Institute

Bok Ki Min

Electronics and Telecommunications Research Institute

Cooperative Institutions

Kyungpook National University

Korea Electrotechnology Research Institute

Seoul National University

Korea Advanced Institute of Science and Technology

Sungkyunkwan University

Korea Basic Science Institute

Hanyang University

Government of the Republic of Korea

Pusan National University

Gyeongsan Science High School

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A new and convenient synthesis of N‐substituted perhydroazepines from adipaldehyde and primary amines with tetracarbonylhydridoferrate, HFe(CO), as a selective reducing agent

Journal of Heterocyclic Chemistry (1988)

Sang Chul Shim Chil Hoon Doh T. J. Kim Hak Ki Lee Ki Doo Kim

Abstract Ethanolic tetracarbonylhydridoferrate combined with adipaldehyde is very efficient for the selective transformation of an amino group into perhydroazepine. A large variety of both aliphatic and aromatic amines react with adipaldehyde in the presence of tetracarbonylhydridoferrate at room temperature and carbon monoxide to give the corresponding N ‐alkyl‐ and N ‐arylperhydroazepines in good to excellent yields.

Primary (astronomy)

10.1002/jhet.5570250522

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Citations (15)

Desulfurization and N-Alkylation of Thiocaprolactam Using Tetracarbonylhydridoferrate

Journal of the Korean Chemical Society (1989)

Sang Chul Shim Jae Soo Lee Chil Hoon Doh Young Gil Kwon Young Kuk Yeo

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Citations (1)

Characterizations and electrochemical performance of pure and metal-doped Li4Ti5O12 for anode materials of lithium-ion batteries

Materials Research Bulletin (2012)

Euh Duck Jeong Hyun Ju Han Ok Sang Jung Myoung Gyu Ha Chil Hoon Doh

10.1016/j.materresbull.2012.04.137

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Citations (15)

알루미늄-공기 단위전지의 음극전위 특성

Applied Chemistry for Engineering (2002)

심은기 도철훈 무성인 황영기 Eun Gii Shim

본 연구에서는 용해억제제를 첨가한 알칼리 매체에 알루미늄-공기 단위전지의 음극전위를 측정하면서 합금원소, 전해질에 첨가하는 억제제의 종류와 농도, 용액온도, KOH 농도, 그리고 부하전류밀도가 미치는 영향에 대해 조사하였다. 알루미늄 음극전위는 실험변수에 크게 좌우되지 않았으며, S.C.E.를 기준하여 -1.65 V로 측정되었으며, 이론치와 비교하면 60% 및 91%에 해당함을 알 수 있었다.

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Ruthenium-catalyzed synthesis of 1-substituted perhydroazepines

Journal of Molecular Catalysis (1990)

Sang Chul Shim Chil Hoon Doh Byung Won Woo Hong Seok Kim Keun Tae Huh

10.1016/0304-5102(90)85203-t

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Citations (11)

Characteristics of Lithium Polysilicate Electrolyte Synthesized by Sol-Gel Processing

Diffusion and defect data, solid state data. Part B, Solid state phenomena/Solid state phenomena (2007)

Bong Soo Jin Bok Ki Min Chil Hoon Doh

To find out suitable Si surface treatment and heat treatment conditions, acid treatment of Si wafer was done for lithium polysilicate electrolyte coating on Si wafer. In case of HCl treatment, the wet angle of a sample is 30o, which is the smallest wet angle of other acid in this experiment. Acid treatment time is 10 min, which is no more change of wet angle. Lithium polysilicate electrolyte was synthesized by hydrolysis and condensation of lithium silicate solution using perchloric acid. Thermal analysis of lithium polysilicate electrolyte shows the weight loss of ~23 % between 400 and 500 , which is due to the decomposition of LiClO4. The XRD patterns of the obtained lithium polysilicate electrolyte also show the decrement of LiClO4 peak at 400 . The optimum heat treatment temperature is below 400 , which is the suitable answer for lithium polysilicate electrolyte.

Thermal Treatment

10.4028/www.scientific.net/ssp.124-126.1031

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Cathodic shift and improved photocurrent performance of cost-effective Fe2O3 photoanodes

International Journal of Hydrogen Energy (2014)

Won Jae Lee Pravin S. Shinde Geun Ho Go Chil Hoon Doh

Photocurrent

Oxygen evolution

Monoclinic crystal system

10.1016/j.ijhydene.2014.01.176

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Citations (15)

Structures and Formation Energies of Li_xC₆(x=1-3) and its Homologues for Lithium Rechargeable Batteries

Bulletin of the Korean Chemical Society (2011)

Chil Hoon Doh Byungchan Han Bong Soo Jin Hal Bon Gu

Using first principles density functional theory the formation energies of various binary compounds of lithium graphite and its homologues were calculated. Lithium and graphite react to form $Li_1C_6$ (+141 mV) but not form $LiC_4$ (-143 mV), $LiC_3$ (-247 mV) and $LiC_2$ (-529 mV) because they are less stable than lithium metal itself. Properties of structure and reaction potentials of $C_5B$, $C_5N$ and $B_3N_3$ materials as iso-structural graphite were studied. Boron and nitrogen substituted graphite and boron-nitrogen material as a iso-electronic structured graphitic material have longer graphene layer spacing than that of graphite. The layer spacing of $Li_xC_6$, $Li_xC_5B$, $Li_xC_5N$ materials increased until to x=1, and then decreased until to x=2 and 3. Nevertheless $Li_xB_3N_3$ has opposite tendency of layer spacing variation. Among various lithium compositions of $Li_xC_5B$, $Li_xC_5N$ and $Li_xB_3N_3$, reaction potentials of $Li_xC_5B$ (x=1-3) and $Li_xC_5$ (x=1) from total energy analyses have positive values against lithium deposition.

10.5012/bkcs.2011.32.6.2045

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Citations (19)

Cathodic decomposition of propylene carbonate at graphite electrodes

Tiehua Piao Chil Hoon Doh Sung-In Moon Su‐Moon Park

The decomposition reaction of propylene carbonate (PC) has been studied at graphite electrode in 1.0 M LiClO/sub 4/ employing a variety of transient electrochemical techniques. Results show that the PC decomposition reaction takes place through an EC' (electron transfer followed by catalytic reduction) reaction path. The pseudo first order rate constants of the chemical decomposition step has been determined. The formation of passive films on the electrode surface has been confirmed. The diffusion coefficients at the fresh and the film covered graphite electrodes have been determined to be 8.2/spl times/10/sup -9/ cm/sup 2//s and 7.1/spl times/10/sup -9/ cm/sup 2//s, respectively.

Propylene carbonate

Chemical decomposition

10.1109/bcaa.1997.574113

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Carbonylation of Protected or Non-protected 2-Bromobenzaldehyde Catalyzed by Cobalt Carbonyl

Bulletin of the Korean Chemical Society (1994)

Sang Chul Shim Dong‐Yup Lee Heung Jin Choi Chil Hoon Doh Keun Tai Huh

The cobalt catalyzed carbonylation of bromobenzene having protected aldehyde group gives the corresponding ester in good yields, but 2-bromobenzaldehyde gives 3-alkoxyphthalide in the noticeable yield instead of alkyl 2-formylbenzoates.

Carbonylation

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Citations (2)