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공액사슬로 연결된 이핵금속착체의 전자적 상호작용에 관한 연구
정민철,Chung, Min-Chul,Munetaka Akita 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.6
The cis-hex-3-ene-1,5-diynyl-bridged diiron compound 3, [(η$^{5}$ - $C_{5}$ M $e_{5}$ ) Fe(dppe)]$_2$($\mu$-C≡C-CH=CH-C≡C), have been prepared and characterized by cyclic voltammetry(CV), and electronic spectroscopy (UV-VIS and near-IR, NMR). From the results, compound 3 show two well resolved, single-electron, reversible oxidation waves by CV, and comproportionation constant(Kc) calculated from the CV data for compound 3. The Mixed-valence (MV) radical cation 3$^{+}$ show strong absorptions in the near IR, 1586 nm, and this band is more readily assigned as MV $\pi$-$\pi$ band of delocalized complex (Robin-Day Mixed-valence Class III), and the $H_{ab}$ , effective coupling parameter are most consistent with electronic delocalization.
β - 디케토네이트 - 온 착체에 이미다졸 - 2 이리덴이 배위된 첨가 생성물의 합성 및 특성
정민철(Min Chul Chung) 한국공업화학회 2002 공업화학 Vol.13 No.5
은 착체 화합물들은 silver β-diketonates 착체와 imidazol-2-ylidenes 배위자와의 반응으로부터 합성되었다. 합성된 착체는 ^1H/^13C-NMR, FT-IR, UV, 원소분석을 통해 특성을 파악하였다. 특히 착체 1은 X-ray 결정구조해석을 통해 분자구조를 알 수가 있었다. 결정 데이터: C_22H_23AgN_2O_2: M_r=455.29, Triclinic, space group P-1, a=7.9671(11) Å, a = 106.800(15) deg, b = 11.625(2) Å, beta = 93.298(12) deg, c = 12.0479(18) Å, gamma = 105.815(12) deg, V = 1016.4(3) Å^3, Z,=2, D_c=1.488 g/㎤, R1=0.1941, wR2=0.2438 for 5614 reflections. 얻어진 착체 1의 구조는 단분자이지만 은 원자를 중심으로 두 배위자가 교대로 적충되어 있고, 은 원자와 은 원자간의 거리가 3.000 Å이다. 그리고 착체의 imidazol-2-ylidene 중 carbenenic 탄소원자의 화학이동은 배위되지 않는 imidazol-2-ylidene 보다 33.3∼38.3 ppm 정도 고자기장쪽으로 이동됨을 알 수가 있었다. The compounds (β-diketonates) Ag (imidazol-2-ylidenes) were prepared by the reaction of silver β-diketonates with imidazol-2-ylidenes as ligands. These species were characterized by ^1H/^13C-NMR, FT-IR, UV, elemental analysis. The complex 1 was structurally characterized by X-ray crystallography. Crystal data: C_22H_23AgN_2O_2: M_r=455.29, Triclinic, space group P-1, a=7.9671(11) Å, a = 106.800(15) deg, b = 11.625(2) Å, beta = 93.298(12) deg, c = 12.0479(18) Å, gamma = 105.815(12) deg, V = 1016.4(3) Å^3, Z,=2, D_c=1.488 g/㎤, R1=0.1941, wR2=0.2438 for 5614 reflections. The crystal packing structure in the complex 1 shows the stacked arrangement. The distance between two silver atoms is 3.000 Å. In the ^13C-NMR, the peaks of the carbenenic carbon atoms in the complexes are shifted upfield by ca. 33.3∼38.3 ppm.
Consumer Responses to Price Shocks of Wine Imports in Korea
정철(Chul Chung),정민철(Min-chirl Chung),김봉근(Bonggeun Kim) 서울대학교 경제연구소 2022 Seoul journal of economics Vol.35 No.1
The main purpose of the study is to develop a methodology that divides consumers’ responses to free trade agreements (FTAs) or commodity taxes into quantitative and qualitative margins, which cause exogenous price changes for certain specific goods. Unlike the usual method of using unit values as a proxy variable for market prices, the use of unit values as a dependent variable for consumers’ qualitative choice showed that qualitative responses to price changes exist, and their size is significant. The methodology of separating and estimating qualitative responses to income changes as in economic crises revealed that many of the existing income effects are qualitative responses. As a key result, the price elasticity of −1.178 estimated by the usual demand model based on a single commodity assumption was reduced to −0.712 for the quantitative margin only, and the qualitative margin was the remaining −0.466, which accounted for more than a third of the overall response. The significant degree of qualitative response estimates suggests that policy makers and researchers should consider qualitative response as an important factor when analyzing the effectiveness of FTAs, especially in consumption.
정경환 ( Kyong-hwan Chung ),고태석 ( Tae-suck Koh ),장덕례 ( Duck-rye Chang ),윤형선 ( Hyung-sun Yoon ),정승원 ( Seung-won Jeong ),정민철 ( Min-chul Chung ),안호근 ( Ho-geun Ahn ) 한국환경기술학회 2006 한국환경기술학회지 Vol.7 No.2
대기환경 규제지역으로 지정된 광양만권의 산업체에 대한 질소산화물 저감기술 적용성에 대해 조사하였다. 질소산화물 저감기술에 대한 효율성, 경제성 그리고 저감기술의 장단점을 비교하여 가장 효율적인 질소산화물 저감기술을 도출하고자 하였다. 광양만권 산업체가 적용하고 있는 질소산화물 저감기술은 질소산화물 배출량이 많을 경우 선택적 촉매환원법이나 선택적 무촉매환원법을 적용하는 비율이 높았다. 질소산화물 배출량이 100톤/년 이하인 공정에는 저NOx 버너를 사용하는 것이 경제적인 것으로 판단되었다. 광양만권 대기환경개선 실천계획을 달성하기 위해서는 질소산화물 발생량이 100톤/년 이상인 공정에는 선택적 촉매환원법을 적용하도록 유도하는 것이 바람직한 것으로 판단되었다. The application of reduction technology for nitrogen oxide was studied to the industries located in Gwangyang-bay area. The efficiency, strength and weakness, and economics for equipment and operation about the technology were investigated to establish the most efficient reduction technology on Gwangyang-bay area. The low NOx burner was useful to the industries emit low concentration of nitrogen oxide compound below 100 ton/year. It is certified that the selective catalytic reduction process has to be applied to the industries which emit a large amount of nitrogen oxide compound more than 100 ton/year to accomplish the action plan for improvement of air pollution on Gwangyang-bay area.