증거서류(證據書類)(2)

김윤근 한국사법행정학회 1964 사법행정 Vol.5 No.9

3-Phenyl-4-Nitrosydone의 전기화학적 연구

金日光,金潤根,韓順鍾 圓光大學校 基礎自然科學硏究所 1989 基礎科學硏究誌 Vol.8 No.3

Aretonitrile 용액중에서 3-phenyl-4-nitrosydnone의 전기화학적 환원을 direct current,differential Pulse polarography, cyclic voltammetry 그리고 controlled potential coulometry 방법으로연구하였다. Phenyl-N 단일 결합의 분리 이전에 nitro 기능기의 비가역적 전자전달-화학반응(EC)기구의 진행으로 다전자 이동에 의한 amino(또는 hydroxylamino)기를 형성하고, 높은 음전위 영역에서 제 2,3 비가역성 환원파의 일전자전달-화학반응에 의한 phenyl hydrazine을 생성하였다. 음극 반파 전위들은 cetyltrimethyl ammonium bromide의 억제효과에 의해 음의 값으로 이동하였고한편, sodium lauryl sulfate micelle은 높은 음전위 영역에서 제 2,3 환원파의 가역성산화 peaks를보였다. An electrochemical reduction on the 3-phenyl-4-nitrosydnone in acetonitrile solu-tion has been studied by direct current, differential pulse polarography, cyclic voltammetry andcontrolled potential coulometry. Before the cleavage of phenyl-N single bond a irreversible elect-ron transfer-chemical reaction(EC) mechanism of nitro fuctional group proceeded to form amino(or-hydroxylamino) group by multielectron transfer whick is followed to give phenyl hydrazineby single electron transfer-chemica1 reaction at the 2nd and 3rd irreversible reduction wave of highnegative potential region. The cathodic half-wave potentials shown to be shift negative due toinhibitory effect of cetyl-trimethyl ammonium bromide micelle whi1e reversible anodic peaks onthe 2nd and 3rd reduction waves in the presence of NaLS at high negative potential region.

Chromium(Ⅲ)의 전기화학적 환원에 관한 연구

김일광,김윤근,김세봉 圓光大學校 基礎自然科學硏究所 1987 基礎科學硏究誌 Vol.6 No.1

The electrochemical reduction of chromium(Ⅲ)in 1×10exp(-1)M sodium perchlorate and 1×10exp(-2)M sulfuric acid aqueous solution has been examined by polarography and cyclic voltammetry. The cyclovoltammetric results showed quasirreversible electrode processes that reduction of chromium(Ⅲ) proceeds by two electron transfer at first reduction step and second reduction step of one electron transfer followed to form chromium metallic state although the direct current polarogram shown to be a three electron transfer process in one reduction step. The height of reduction wave was suppresed and strongly shifted to the more negative potential in cationic surfactant(CTABr), nonionic surfactant triton x-100 and EDTA effects. In anionic surfactant NaLS solution, the height was increased while the half-wave potential shifted to the height negative potential.

수용액에서 연료용 수소를 얻기 위한 MgFe_2O_4 광반도성 전극의 제조와 특성에 대하여

김일광,이홍,최창진,김윤근,천현자 圓光大學校 基礎自然科學硏究所 1987 基礎科學硏究誌 Vol.6 No.2

In the light of the rarity of p-type semiconducting oxides and the unusual properties of the magnesium-iron-oxygen system, it is worthwhile to examine the solied state and photoelectrochemical properties of these materials more closely. This work presented an investigation of the preparation and characterization of magnesium-substituted ironoxid ceramics. Sintered discs of magnesium substituted ironoxides were prepared by conventional powder state mixing techniques. X-ray diffraction and scanning electron microscopy experiments showed that these materials are multiphase, containing both MgFe_2O_4 corundum phase and a spinel phase. More important, photoelectrochemical experiments using the ceramic discs as photoelectrodes showed both cathodic photocurrents and anodic photocurrents under illumination. Photochemical and electrochemcal techniques have been used to show that the inhomogeneities of these materials in the near surface region may be related to the photoelectrochemical properties of the magnesium substituted ironoxide bi-type photoelectrodes.

물과 Micelle 용액에서 Benzaldehyde의 전기화학적 환원에 대한 연구

金日光,金潤根,金峯元,印權植 圓光大學校 基礎自然科學硏究所 1988 基礎科學硏究誌 Vol.7 No.3

The electrochemical reduction of benzaldehyde in 10% ethanol-water solution contained surfactants has been studied by direct current (DC) differential pulse (DP) polarography, cyclic voltammetry (CV) and controlled potential coulometry (CPC). A totally irreversible electrode reaction processes of benzaldehyde reduction proceeded by one electron transfer to form anion radical which undergoes both protonation and a second one electron reduction to give benzyl alcohol as a major product. The cathodic reduction wave was seperated by inhibition of sodium lauryl sulfate due to selectivity and effect of anionic charged micelle. The possible reduction mechanism with controlled pH range was suggested.

Acetonitrile 용액중에서 살충제 O,O-Dimethyl-O-(3-methyl-4-nitrophenyl)-phosphorothioate(Fenitrothion)의 전기화학적 환원에 대한 연구

金日光,金潤根,千賢子,朴勝熙 圓光大學校 基礎自然科學硏究所 1986 基礎科學硏究誌 Vol.5 No.2

The electrochemical reduction of o,o-dimethyl-o-(3-methyl-4-nitrophenyl)-phosphorothioate(fenitrothion)has been studied in acetonitrile solution containing surfactant micelle by direct current(DC)-differential pulse(DP) polarography, cyclic voltammetry(CV) and controlled potential coulometry(CPC). The totally quasiirreversible electron transfer-chemical reaction (EC, EC mechanism) of fenitrothion reduction proceeded by four electron transfer to form o,o-dimethyl-o-(3-methyl-4-hydroxyaminophenyl)-phosphorothiate which undergoes single bond of the phosphorus atom and phenoxy group cleaves to give p-hydorxyamino-m-cresol and dime-thyl thiophosphonate as major product by two electron transfer-protonation. The polarograpic reduction waves shown to be reversible adsorption current (-0.9 volts vs.Ag-AgCl) in sodium lauryl sulfate micelle solution and split up on selectivity of anionic micelle effect in two step at the first reduction peak.

1-Benzyl-4-Iodomethyl-2-Azetidinone의 합성과 lodo기에 대한 전기화학적 환원반응

金日光,李英行,李寀浩,蔡奎允,金潤根 원광대학교기초자연과학연구소 1992 基礎科學硏究誌 Vol.11 No.3

1-Benzyl-4-iodomethyl-2-azetidinone(BIMA)을 합성하여 iodomethyl기에 대한 전기화학적 환원을 direct current, differential pulse polarography, cyclic voltammetry 그리고 controlled potential coulometry 방법으로 연구하였다. BIMA의 환원과정은 1단계(-1.35 volts vs. Ag-AgCl)에서 완전비가역과 2전자이동 후에 양성자가 첨가되는 EEC 반응기구로 진행되었으며 1-benzyl-4-methyl-2-azetidinone이 생성되었다. 양이온 계면활성제(cetyltrimethylammonium bromide)의 농도가 진하여질수록 양전위 이동이 있었으나 음이온 계면활성제(soduim lauryl sulfate)의 경우에는 2단계로 세분화되는 현상이 나타났다. pH변화에 따른 전극환원과정과 생성물 분석의 결과를 바탕으로 전기화학적 반응기구를 제안하였다. 1-Benzyl-4-iodomethyl-2-azetidinone(BIMA) was synthesized and its electrochemical reduction was investigated by direct current, differential pulse polarography, cyclic voltammetry and controlled potential coulometry. The irreversible two electron transfer on reductive dehalogenation of iodo group proceeded to form 1-benzyl-4-methyl-2-azetidinone by EEC electrode reaction mechanism at the first reduction step(-1.35 volts vs. Ag-AgCl). The polarographic reduction waves separated into two reduction steps due to anionic surfactant(soduim lauryl sulfate) effects, while the waves were shifted to the positive potential as the concentration of cationic surfactant(cetyltrimethylammonium bromide) increased. Upon the basis of results on the product analysis and interpretation of polarogram with pH variable, EEC electrochemical reaction mechanism was suggested.

비수용액에서 Co(II)-tetraphenylporphyrin의 전기 화학적 연구

金日光,金潤根 圓光大學校 基礎自然科學硏究所 1985 基礎科學硏究誌 Vol.4 No.1

The electrochemical behavior of Co(Ⅱ)-tetraphenylporphyrin at a static mercury drop electrode in a nonaqueous solution has been examined by DC polarography, DP polarography, cyclic voltammetry and controlled potential coulometry. The polarographic data showed well diffusion controlled reduction process of three-electron transfer in three reduction steps. But, the cyclovoltammetric results showed four reduction steps in electrode reaction. The reduction waves shown to be three reversible electron transfer and one irreversible electron transfer reduction. The possible mechanism on the electrochemical reduction of Co(Ⅱ)-tetraphenylporphyrin was suggested.

α,β-Dibenzyl N-Benzylidene L-Aspartate의 Imino기에 대한 선택적 전해환원반응

金日光,金潤根,李英行,蔡奎允 圓光大學校 基礎自然科學硏究所 1989 基礎科學硏究誌 Vol.8 No.3

0.1M LiCl의 ethanol용액에서 α,β-dibenzyl N-benzylidene L-aspartate의 전기화학적환원을 direct current, differential pulse polarography, cyclic voltammetry 그리고 controlled potential coulometry 방법으로 연구하였다. α,β-dibenzyl N-benzylidene L-aspartate의 환원과정은 1단계(-0.92volts vs. Ag-AgCl)에서 양성자 첨가와 2전자 이동에 의한 완전 비가역의 CEC 혹은 CE 반응기구로 진행되었으며 α,β-dibenzyl N-benzyl L-aspartate가 생성되었다. 계면활성제가 포함된 용액에서 polarography 환원파는 전체적으로 약간 억제되었으며 Triton X-100의 농도가 진해질수록 비가역성을 증자시키는 것으로 나타났다. 생성물 분석과 pH변화에 따른 전극환원과정에 대한 고찰로 전기화학적 반응기구를 제안하였다. The electrochemical reduction of α,β-dibenzyl N-benzylidene L-aspartate in 0.1 MLiCl ethanol solution was investigated by direct current (DC), differential pulse (DP) polarography, cyclic voltammetry and controlled potential coulometry (CPC). The irreversible reductive amination of iminogroup proceeded to form α, β-dibenyl N-benzyl L-aspartate by CEC or CE electrochemical reaction mechanism at the first reduction step (-0.92 volts vs. Ag-AgCl). The polarographic reduction wave was slightly suppressed due to inhibitory effect of micelle, while the irreversibility was increased according to the increase of Triton X-100 concentration. Upon the basis of product analysis and polarogram interpretation with pH change, possible CE electrode reaction mechanism was suggested.

물과 Micelle용액에서 Benzaldenhyde의 전기화학적 환원에 관한 연구

金日光,金潤根 圓光大學校大學院 1988 論文集 Vol.2 No.-

The electrochemical reduction of benzaldehyde in 10% ethanol-water solution contained surfactants has been studied by direct current (DC) differential pulse(DP) polarography, cyclic voltammetry (CV) and controlled potential coulometry(CPC). A totally irreversible electrode reaction processes of benzaldehyde reduction proceeded by one elecron transfer to form anion radical which undergoes both protonation and a second one electron reductio to give benzyl alcohol as a major product. The cathodic reduction wave was seperated by inhibition of sodium lauryl sulfate due to selectivity and effect of anionic charged micelle. The possible reduction mechanism with controlled pH range was suggested.