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RISS 인기검색어
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柳珙植 群山大學校 1983 論文集 Vol.5 No.-
In order to make a synthetic plan of complex organic compounds, first of all, it is necessary to be capable of searching for the objects' structures by each systematic thinking capacity and original ideas, accompanied by systematic synthesis. First, classifying of organic synthesis, 1. Total synthesis & partial synthesis 2. Rational synthesis & non-rational synthesis 3. Classified into linear synthesis and convergent synthesis Second, the synthesis of complex organic compounds 1. Finding out what is the important problem in synthetic process, the structure of the objects should be simplified by contrasting synthesis, and the important mid-materials and originals found. 2. Making several synthetic plans of them, comparing and examing the relative advantage and disadvantage(of them), making a decision of a specific synthetic plan, and selecting each procedure, specific reactions and reagents according to them should be chosen. 3. Planning and performing experiments, the result of them should be examined and analyzed, and the process to supplement insufficient parts added. 4. The rapid understanding of synthetic polymers requires full recongnation of the synthesis of complex organic compounds.
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음이온 교환 크로마토 그래피법에 의한 여러 PH에서 우라늄과 바나듐의 용리 현상에 관한 연구
柳珙植,金鍾勳 群山大學校 1985 論文集 Vol.11 No.-
The Chemical species formed by uranium and vanadium and their equilibria have been investigated from elution behaviors with the pH variation by anion exchange chromatography. The species of uranium is only ?? at the pH 1 and the existing equilibrium is ?? at the pH range of 3∼4. In the case of higher pH than 5 uranium seems to exist ??, ?? and ??. At the pH 4 its constant calculated at 20℃ is ??. The species of vanadium is ?? at the pH 1 and the higher pH than 2, main species, ?? was converted into ?? species through the equilibrium of ??. The Chemical species formed by uranium and vanadium and their equilibria have been investigated from elution behaviors with the pH variation by anion exchange chromatography. The species of uranium is only ?? at the pH 1 and the existing equilibrium is ?? at the pH range of 3∼4. In the case of higher pH than 5 uranium seems to exist ??, ?? and ??. At the pH 4 its constant caluated at 20℃ is ??. The species of vanadium is ?? at the pH 1 and the higher pH than 2, main species, ?? was converted into ?? species through the equilibrium of ??.
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차기원,유공식,김종훈,Ki-Won Cha,Cong-Sik Yu,Jong-Hun Kim 대한화학회 1985 대한화학회지 Vol.29 No.6
옥살산과 아세트산 용액의 농도변화에 따른 우라늄과 바나듐의 음이온교환수지로부터의 용리거동 및, UV및 스펙트럼 변화로부터 이들 이온의 화학종과 평형관계를 연구하였다. 0.005~0.5M 옥산살산 용액속에서 우라늄과 바나듐은 각각 $UO_2(C_2O_4)_2^{2-}$, $UO_2(C_2O-4)_3^{4-}$ 및 $VO_2(C_2O_4)_2^{3-}$의 화학종으로 존재하고, 0.01~0.1M의 아세트산 용액에서 우라늄은 $VO_2(Ac)_2^0$, $UO_2(Ac)_3^{1-}$의 화학종으로 존재하며, 바나듐은 $VO_2^++2Ac^-=VO_2(Ac)_2^-$의 평형이 이루어짐을 확인하였다. The chemical species formed by uranium and vanadium and their equilibria have been investigated in the various concentrations of oxalic and acetic acids by the ion exchange chromatography and UV-Vis spectrophotometry. Uranyl and vanadyl ions seem to be form the complex as $UO_2(C_2O_4)_2=$, $UO_2(C_2O_4)_3^{4-}$ and $VO_2(C_2O_4)-2^{3-}$ respectively in the concentration range of 0.005∼0.05M oxalic acid concentration. In the case of acetic acid the equilibria of $UO_2^{2+}+3Ac^-=UO_2(Ac)_3^-$ and $VO_2^++2Ac^-=VO_2(Ac)_2^-$ were existed individually according to the increase of acetic acid concentration.
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