• Bulletin of the Korean Chemical Society
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• 제28권3호
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• pp.417-420
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• 2007

Mononuclear mixed-anions Mn complex of TPAMn(η2-NO3)(η-ClO4), where TPA is tris(2-pyridylmethyl)-amine, has been synthesized and characterized. The neutral TPAMn(η2-NO3)(η-ClO4) was obtained from the reaction between Mn(NO3)2·4H2O and [H3TPA](ClO4)3 in MeOH. X-ray crystallographic structure of mononuclear TPAMn(η2-NO3)(η-ClO4) complex showed a seven-coordinated geometry with a tripodal tetradentate TPA, a terminal perchlorate and an η2-bound nitrate.

• Bulletin of the Korean Chemical Society
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• 제13권1호
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• pp.37-41
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• 1992

The reactions of nitrous acid with hydrogen peroxide in acidic aqueous solution in the presence of several added anions have been studied at $0^{\circ}C$ and pH 2-4 to investigate the nucleophilic catalysis of these anions. From the dependence of reaction rates on the anion concentrations, significant catalytic effects were found for $Cl^-,\;Br^-,\;SCN^-$, in order of effect $SCN^-\;{\approx}\;Br^->Cl^-$, while no observable effect was found for ${ClO_4}^-$ and ${NO_3}^-$. These results support O-nitrosation reaction is the rate-determining step and NOX formed in the presence of an anion ($X^-$) also acts as a nitrosating agent and accelerates the overall reaction rate. The order of reactivity was found to be NOCl>NOBr>NOSCN, which is consistent with the results of N-nitrosation and S-nitrosation reactions.

• 한국대기환경학회지
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• 제2권3호
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• pp.27-33
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• 1986

Atmospheric particulate matter (A. P. M.) was collected and size-fractionated by an Andersen high-volume air sampler over 15 month period from Jan. 1985 to Feb. 1986 in Seoul. The concentration of chloride, nitrate and sulfate were extracted in an ultrasonic bath and were analyzed by ion chromatography. The annual arithmetical mean of A. P. M. was 128.54 $\mug/m^3$. The concentration of anions were 2.88 $\mug/m^3$ for chloride, 3.86$\mug/m^3$ for nitrate, and 25.44$\mug/m^3$ for sulfate. The content of A. P. M. was lowest in the particle size range 1.1 $\sim 3.3\mum$ and increased as the particle size increased or decreased. And the anions exhibited a seasonal variation in the isize distribution. The contents of anions were higher in winter than summer. Ther ratio of fine particles to the total particles defined by F/T for chloride, nitrate and sulfate. The F\ulcornerT of these anion generally decrease with increasing air temperature. This tendency was prevalent in the chloride and nitrate.

• 분석과학
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• 제9권1호
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• pp.35-42
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• 1996

원자력 발전소의 배관 부식 등의 방지를 위하여 초순수에 첨가되는 고순도 시약 중의 미량 음이온 성분올 모세관 전기영동법에 의하여 정량하는 분석법을 개발하였다. 전해질은 5mM 크롬산염(pH=8.0)을, 캐필러리는 내경이 50 또는 $75{\mu}m$인 석영 캐필러리 내부를 염화 삼메틸 실란으로 처리하여 사용하였다. 기타 기기 조건은 전압 20kV, 검출은 254nm에서 간접 자외흡수법을 사용하였고 주요 정량 성분은 $Cl^-$, $NO{_3}^-$, $SO{_4}^{2-}$, $N{_3}^-$, $PO{_4}^{3-}$등이며, 시료 주입은 시료 농도가 1ppm 이상일 때는 유체역학적 주입법으로, 1ppm 이하는 계면 동전기 주입법을 적용하였다. 특히 본 연구에서는 시료 주입시 공존 이온의 영향을 조사한 결과 유체역학적으로 시료를 주입할 때는 시료 내 공존하는 음이온의 영향이 크게 없었으나, 계면 동전기적인 시료 주입시에는 공존하는 이온량과 전기영동적 이동도에 따라 분석 이온의 신호 크기가 크게 변함을 확인하였으며, 각 분석 성분 주입량, 즉 신호 크기는 시료 용액의 저항에 비례하였다. 따라서, 분석 이온보다 과량의 공존 이온 존재하에 계면 동전기 주입법으로 분석할 경우 시료 용액과 표준 용액의 전기 전도도 차이를 보상할 수 있는 표준물 첨가법 또는 내부 표준물법 등의 적절한 방법을 반드시 사용해야 한다.

• 한국토양비료학회지
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• 제19권3호
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• pp.223-229
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• 1986

1. 질산염영양액(窒酸鹽營養液)으로 관수(灌水)하여 재배(栽培)한 담배식물(cv. NC82)의 엽서별(葉序別) 이온균형(均衡)을 조사(調査)한 결과(結果) 무기양(無機陽)이온과 무기음(無機陰)이온의 총량(總量)은 출엽순서별(出葉順序別)로 차이(差異)가 있어 하위엽(下位葉)에서는 무기양(無機陽)이온이 무기음(無機陰)이온보다 3배(倍)이상 차이(差異)(5차엽(次葉))를 보이나 상위(上位)의 어린잎(10차엽(次葉))에서는 1.3배(倍)로 떨어졌다. 2. 양(陽)이온의 대부분은 $K^+$, $Ca^{{+}{+}}$, $Mg^{{+}{+}}$이었으며 K+Ca는 출엽(出葉)된 모든 잎에서 양(陽)이온의 80%정도로 일정한 비율이 유지되었다. 그 구성비율(構成比率)은 오랜잎일수록 $Ca^{{+}{+}}$ 높고 엽령(葉齡)이 커질수록 증가(增加)하나, 어린잎 쪽에서는 $K^+$의 비율이 높으며 엽령(葉齡)에 따라 점차 낮아지는 경향이었다. 3. 양(陽)이온총량(總量)은 무기음(無機陰)이온과 유기산(有機酸) 음(陰)이온으로 이온균형(均衡)이 유지(維持)되었으며 하엽(下葉)에서는 유기산(有機酸) 음(陰)이온에 의존(依存)한 이온균형(均衡)이 무기음(無機陰)이온보다 컸으나 상엽(上葉)으로 갈수록 점차 반대 경향으로 나타났다. 4. 이온총량(總量)이 큰 하엽(下葉)에서는 양음(陽陰)이온 총량(總量) 차이(差異)가 나타났으나 상엽(上葉)에서는 균형(均衡)이 거의 유지(維持)되었다. 하엽(下葉)의 이온총량차(總量差)는 일부(一部) 유기산석회염(有機酸石灰鹽)이 침전(沈澱)되어서 수산(蓚酸)이 검출되지 않았기 때문인 것 같다.

• 한국세라믹학회지
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• 제27권1호
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• pp.86-90
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• 1990

The shape and characteristics of polymers in hydrolzed and polymerized sol were affected by the types of catalysts. In our research, the contents of water and catalysts were constant and the types of catalyst were varied. In the case of acid catalysts, polymers in sol were linear and spinnable. The shapes of polymer were affected by the types of anions in acid catalysts. In the case of catalyst having anions, F, Cl, in the same period, the effects were similar. But in the case of base catalysts polymers were rigid rod like and not spinnable.

• Bulletin of the Korean Chemical Society
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• 제32권4호
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• pp.1228-1230
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• 2011

A new amine receptor 2 utilizing anthracene and nitrophenyl group as signaling group was designed and synthesized. The receptor 2 only utilizes four amine N-H's and 9-anthracenyl hydrogen to bind anions. The receptor 2 can bind anions through hydrogen bonds with a selectivity of $CH_3CO_2^-$ > $H_2PO_4^-$ > $F^-$ > $C_6H_5CO_2^-$ > $Cl^-$ in highly polar solvent such as DMSO without protonation of amine.

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3215-3218
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• 2011

A new anion receptor utilizing carbamate functionality as hydrogen bonding site has been designed and synthesized. This new receptor 2 has two amide hydrogens and two carbamate hydrogens anchored at 1,8-position of anthracene. These four hydrogens form a concave structure for the anions and the receptor 2 was found to be a selective receptor for acetate among the anions investigated.

• Bulletin of the Korean Chemical Society
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• 제28권9호
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• pp.1531-1534
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• 2007

Anion receptor based on 2-imidazolidone molecular scaffold has been synthesized. Anion binding studies carried out using 1H NMR and UV?vis spectroscopy revealed that this receptor 6 displays selectivity for the for the oxyanions such as acetate and dihydrogenphosphate ions and the affinity for the anions simply reflects the basicity of anions.

• 한국안전학회지
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• 제5권3호
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• pp.39-43
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• 1990

The transport of phenol from waste water through the liquid surfactant membrane containing Aliquat 336 as a carrier was analyzed by a theoretical model. Extraction experiments was carried out to investigate the effect of process parameters, such as mixing intensity, concentration of sodium hydroxide in internal aqueous solution, and counter anions, and initial phenol concentration in waste water at $25^{\circ}C$. It was found that transport rate of phenol increased with increasing pH differents. The transport rate of phenol in waste water was influenced by counter anions.