5, 10, 15, 20-iron(III)(tetrakis(Dentafluorophenyl)porphvrin)의 플루오르 다리형 이합체 형서에 대한 분광학적 증거들

남학현 光云大學校 1995 論文集 Vol.24 No.-

The first electronic and vibrational spectroscopic evidences for the formation of the μ-fluorido dimer of 5,10,15,20-lron(Ⅲ)(tetrakis(pentafluorophenyl) porphyrin), ((TPFP)Fe)₂F, are reported. The addition of tetra-n-butyl ammonium fluoride (TBAF) to the solution of(TPFP)FeCl in dry THF significantly changes the absorption spectra of the system depending on the molar ratio of those two compounds: (a) when R=[TBAF]/[(TPFP)FeCl] <0.2 the λmax of the Soret band is blue shifted to 402 nm from that of the chloro complex; (b) when R <0.5, the Soret band is split into three distinctive bands at 402, 419 and 442 nm with varying absorbances; (c) when R>0.5, only the band at 442 nm is apparent. The absorbance at 442 nm increases with the molar ratio R to about 0.5 and levels off at higher ratios, suggesting the formation of the μ-fluorido dimer of (TPFP)Fe. The IR spectrum of the solid left after evaporating the solvent under nitrogen atmosphere reveals a new peak at 885 ㎝ -₁ in the region expected for the asymmetric Fe-F-Fe stretching (V? (Fe-F-Fe)). Resonance Raman (RR) spectra are recorded with the 441.6nm excitation line of He-Cd laser for (TPFP)FeCl mixed with varying amount of TBAF in THF solvent. As the molar ratio of fluoride increases, new band at 456 ㎝-¹appears, and both oxidation state sensitive band (v4; 1364 ㎝-¹) and spin state sensitive band (v₂;1560㎝-¹) of(TPFP) FeCl downshift to 1349 and 1548 ㎝-¹, respectively. In comparison with the previously known symmetric Fe-X-Fe stretching modes of ((TPP) Fe₂X(X=N, O or C) complexes, the 456 ㎝-¹ band which is strongly resonance enhanced by the Soret excitation of ((TPFP)Fe)₂F, the iron atom in the μ-fluorido dimer is believed to be of high-spin with formal oxidation state rather close to + 2.5.

협상에서 사회적 동기가 절차공정성과 감정에 미치는 영향

남학현,이병철 동국대학교 경영연구원 2007 경영과 사례연구 Vol.30 No.1

Coextraction 형 음이온선택성 광센서에서 고분자 지지체의 영향에 관한 연구

남학현 光云大學校 1994 論文集 Vol.23 No.-

The selectivity, response time and reproducibilty, and adhesion property of anion-selective optodes are heavily dependent on their polymer matrices. We investigated the polymer matrix effect on those characteristics for coextraction type optodes, which are composed of TDMAC1, ETH2412, DOS or DOA plasticizer, and one of the following four different polymer matrices, i.e., PVC, PVC(50 wt%) /hydroxylated PVC(50 wt%), Tecoflex PU(80 wt%)/hydroxylated PVC(20 wt%) and CTA(cellulose triacetate). The selectivity patterns for all optodes tested follow well-known Hoffmeister series as expected. However, selectivity coefficients for each optode vary depending on the polymeric matrix employed ; CTA-based membrane has the highest selectivity coefficients for lipophilic anions(log K????,????=1.32) ; membranes with PVC and PU/hydroxylated PVC blend are almost same in their anion-selectivity. Response times and reproducibilities were examined by repeatedly changing the sample solutions containing 10??M and 10??M of the thiocyanate ion ; it seems that the response times for increasing concentration are delayed as the total weight percent of PVC increases. Adhesion test with Soctch tape and ultrasonic bathing show that PU/hydroxylated PVC has the strongest adhesion to glass surface. It is concluded that the anion-selective optode with PU/hydroxylated PVC matrix outperforms the most popular PVC-based optode.

Coextraction 형 음이온선택성 광센서에서 고분자 지지체의 영향에 관한 연구

남학현(Hak Hyun Nam) 광운대학교 인문사회과학연구소 1994 인문사회과학논문집 Vol.23 No.-

Coextraction형 음이온선택성 광센서를 이용한 인체 타액 내의 티오시안염 양의 결정

남학현,차근식,한상현 光云大學校 1994 論文集 Vol.23 No.-

동시추출형 음이온선택성 광센서는 티오시안삼염과 같은 지용성 음이온에 대하여 선택적으로 감응을 한다. 이러한 광센서는 음이온을 막 안으로 끌어들일 수 있는 양이온성의 4차암모니움염(TDMACI)과 전하균형을 맞추며 색의 변화를 수반하는 음이온성 pH 지시약(ETH2412)으로 구성되어 있다. 감응화학물질들은 DOA 가소제와 PU 고분자의 혼합물에 녹여서 성형한 것이다. 이 광센서 막의 선택성향은 음이온의 수화에너지 순서인 Hoffmeister 계열(CIO?> SCN?> I?> NO?> Br?> C1?> HCO?> CH?COO?> SO? ∼ HPO??)을 따른다. 본 논문은 이러한 광센서를 이용하여 인체의 타액에 함유되어 있는 티오시안산염의 양을 결정하였다. 고분자 지지체의 성분은 PVC와 거의 같은 선택계수를 갖지만 감응속도나 재현성은 훨씬 뛰어나고 생체시료에 대한 적합성이 우수한 PU/hydroxylated PVC이었다. 티오시안산염은 독성의 시안산염이 대사된 결과 생성되는 부산물이며, 이 물질의 양을 측정하면 흡연의 영향을 얼마나 받았는지 알 수 있는 척도 자료가 된다. 10명의 타액을 이 광센서로 검출한 결과는 비교적 복잡한 장치를 써야하는 이온선택성 방법으로 얻은 결과와 견줄만한 것이었다.

Coextraction 형 음이온선택성 광센서를 이용한 인체 타액 내의 티오시안염 양의 결정

남학현(Hak Hyun Nam),차근식(Geun Sig Cha),한상현(Sang Hyun Han) 광운대학교 인문사회과학연구소 1994 인문사회과학논문집 Vol.23 No.-

환경시료중의 Ammonuim ion 의 검출법 ( The detecting method for Ammonium ion in Environmental Samples )

홍욱선,남학현,차근식,조용희,팽기정 한국대기환경학회 1995 한국대기환경학회 학술대회논문집 Vol.- No.-

흐름계를 이용한 크롬도금 용액의 Cr(Ⅲ)와 Cr(Ⅵ)의 분광학적 동시 분석 방법

김선관,남학현,소재춘,이원,차근식,한상현,Kim, Sun Kwan,Nam, Hakhyun,So, Jae Chun,Lee, Won,Cha, Geun Sig,Han, Sang Hyun 대한화학회 1995 대한화학회지 Vol.39 No.2

크롬도금 용액에 공존하고 있는 Cr(III)와 Cr(VI)의 양을 자외선/가시광선 분광기에 장착한 흐름계 장치를 이용하여 시료당 5분 이내에 두 가지 물질의 양을 동시에 분석하는 방법을 개발하였다. Cr(III)와 Cr(VI)는 각각 580 nm와 440 nm에서 0.05 g/L와 0.005 g/L 이상의 범위에서 Beer-Lambert 법칙에 따르는 특성 ${\lambda}_{max}$를 나타내며, 이 파장들에서의 흡광도는 pH<4의 조건에서는 pH변화에 거의 영향을 받지 않았다. 따라서 일반적으로 크롬의 농도가 수 g/L인 후처리 크롬 도금조의 용액을 흐름계의 장치에서 pH=1의 황산 용액으로 묽힌 후, 자외선/가시광선 분광기로 측정하면 Cr(III)와 Cr(VI)의 양 및 총 크롬의 양을 기존의 산화-환원 적정 방법(최소 40분/sample)보다 간편하고 신속정확하게 동시 정량할 수 있었다. 이 장치는 설치 및 사용이 간단하고, 설치 비용이 저렴하므로 많은 도금 산업 현장에서 용이하게 응용할 수 있다. The amount of Cr(Ⅲ) and Cr(Ⅵ) in a chromium plating solution could be determined simultaneously within five minutes using UV/VIS spectrophotometer coupled with a flow-through analysis(FTA) setup. The λmax's at 580 nm and 440 nm which correspond to Cr(Ⅲ) and Cr(Ⅵ), respectively, well obey the Beer-Lambert law in the range over 0.05 g/L for Cr(Ⅲ) and 0.005 g/L for Cr(Ⅵ). when the pH of the sample is less than 4.0, the absorption extinction coefficients of those peaks are not much dependent on the proton concentration. The amount of Cr(Ⅲ) and Cr(Ⅵ), and the total chromium in post treatment chromium plating solution, which normally has few g/L of Cr concentration, could be easily measured using UV/VIS spectrophotometry after the sample had been diluted with sulfuric acid of pH=1.0 in the flow-through analysis setup; this method is far more convenient and faster than the common redox titration (which requires at least 40 min/sample) method, while the accuracy of the method is highly comparable to conventional titrimetric method. Since the implementation of an PTA-UV/VIS setup in any plating industry is cost effective and easy to operate, the analytic method described in this paper may be applied directly for in situ analysis of plating solutions.

태권도 선수의 스포츠상해에 관한 실태조사 분석

지치환,남학현 圓光大學校附設 生活體育硏究所 2001 生活體育硏究 Vol.12 No.-

To provide medical materials that are needed to prevent the injuries and appropriate recover from injuries, and to prepare basic data to improve players ability, this study analyzed the sports injuries of Tae Kwon Players, clinically, who are injured and had a medical examination in the Yong In University Hospital from Jan. 01, 1998 to Aug. 31, 2000. On the results of examinations, I compared the frequency of each item and total frequencies and computed by a percentage. A conclusion was made out from the above study are as follows. 1. On the total injuries of 188 cases, the numbers of acute injuries are much many than chronic injuries in the ratio of 170 cases (90.4%) to 18 cases (9.6%). 2. When classified the total injuries (180 cases) by regions, the sprains are in large numbers than the other injuries. When classified the sprains by the upper and under limbs, the injury of the under limbs are in large numbers. 3. On the results of classified the injuries by sides, the left side is 77cases, the right side is 76 cases, there is not vary difference, and the center is 35 cases. 4. On the results of researched the causes of injuries, 173 cases are injured in training and 15 cases are injured from games, former cases are much many than the latter cases. On the injuries in training, 106 cases are injured from practice games and 67 cases are injured in free training. 5. On the period of medical treatment, 163 cases (86.7%) are needed less than one week. 6. On the result of classified the injuries by season, 66 cases (35.1%) are occurred in autumn, that ratio is the highest among of the four seasons, 54 cases (28.7%) in spring, 46 cases (24.4%) in summer and 22 cases in winter.

특강7 : 소형 고체상 센서를 이용한 임상측정용 혈액분석기 개발

차근식,남학현,최강,이동권,신재호,오현준 한국분석과학회 1998 학술대회논문집 Vol.- No.-