• Bulletin of the Korean Chemical Society
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• 제25권2호
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• pp.172-176
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• 2004

A highly selective membrane electrode based on1,3,5-triphenylpyrylium perchlorate (TPPP) is presented. The proposed electrode shows very good selectivity for sulfate ions over a wide variety of common inorganic and organic anions. The sensor displays a nice Nernstian slope of -29.7 mV per decade. The working concentration ranges of the electrode is 1.0{\times}10^{-1}-6.3{\times}10^{-6} $M with a detection limit of $4.0{\times}10^{-6}$ M (480 ng per mL). The response time of the sensor in whole concentration ranges is very short (< 6 s). The response of the sensor is independent on the pH range of 2.5-9.5. The best performance was obtained with a membrane composition of 32% PVC, 59% benzyl acetate, 5% TPPP and 4% hexadecyltrimethylammonium bromide. It was successfully used as an indicator electrode for titration of sulfate ions with barium ions. The electrode was also applied for determination of salbutamol sulfate and paramomycine sulfate.

• 분석과학
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• 제7권1호
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• pp.17-23
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• 1994

졸-겔법에 의해 dye host로 사용될 수 있는 무기/유기 복합체(ORMOSIL)를 제조하였으며, 이 복합체가 dye host로 적합한 조건을 갖췄음을 UV/VIS Spectrophotometer를 이용하여 90% 정도의 투광성을 얻음으로써 알 수 있었다. 이 투광성은 졸-겔 공정 중 촉매로 쓰이는 염산의 양이 적고 묵힘시간이 짧을수록 커짐을 알 수 있었다. 또한 이렇게 제조된 Host에 Rhodamine 6G Perchlorate를 도핑하여 유기염료의 형광 및 투광성을 측정한 결과 겔화온도가 증가될수록 형광 강도가 증가하며 투광성은 감소하는 것을 관찰할 수 있었다.

• 한국추진공학회지
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• 제19권5호
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• pp.15-21
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• 2015

착화기의 1차 점화장약으로 널리 사용되어지고 있는 ZPP(Zirconium/Potassium perchlorate)의 열분해 특성을 differential scanning calorimetry(DSC)를 사용하여 평가하였다. ZPP의 열분해반응에 대한 속도론적 파라미터를 결정하기 위하여, 다른 가열 속도를 갖고 수행된 DSC 결과들을 AKTS사의 Thermokinetics software를 사용하여 분석하였다. 결정된 속도론적 파라미터를 사용하여 계산된 모사값들은 실험적 결과들과 잘 일치함으로써, ZPP의 열분해과정에 대한 속도론적 모사의 유효성을 검증할 수 있었다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 춘계학술대회 논문집
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• pp.169-172
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• 2009

본 연구에서는 고연소속도 고체추진제 개발을 위한 현재의 기술들과 연구동향을 분석하였고, 연소속도 조절제에 대한 추진제 적용 및 연소 특성에 대해 검토하였다. 또한 연소속도 조절제로bis(ethylenediamine)copper perchlorate(BECP)를 제조하였고 이의 연소특성이 Butacene/AP 추진제에서 평가되었다. 결과적으로, Butacene과 AP로 구성된 고연소속도 고체 추진제에서 금속배위화합물인 BECP는 고체추진제의 연소속도를 크게 증진시켰다.

• 한국추진공학회지
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• 제21권2호
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• pp.26-31
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• 2017

고체 추진제의 환경적 문제는 고체 로켓에서 중요한 이슈로 부각되고 있다. 예를 들어 고체추진제의 산화제인 ammonium perchlorate (AP)는 염산과 같은 독성 가스와 대기 오염을 발생시켜 환경적 문제를 야기한다. 산화제 중 N-guanylurea dinitramide (GuDN)는 높은 성능과 압력 지수를 가지고 있으며, 가스발생기 추진제에서 연소하는 동안 친환경적인 연기를 배출하는 성질을 가지고 있기 때문에 환경친화적으로 효과적인 후보 물질이다. 본 논문에서는 가스발생기 추진제로서 특성에 대하여 이론적 분석, 추진제 제조공정성, 추진제 경도 특성 및 연소특성에 대하여 연구하였다.

• Journal of Photoscience
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• 제8권3_4호
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• pp.113-117
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• 2001

Several styrylquinolium salts were synthesized to investigate their absorption and thermal properties, which had five different p-aminobenzene units and three different counter ions (iodide, perchlorate, and hexafluorophosphorate anion), respectively. Hydroxy, methoxy, and methyl group in the meta position to the amino group led to bathochromic shift, while Ν-ethyl-Ν-chloroethylamino unit instead of Ν,Ν-diethylamino unit resulted in hypsochromic shift. A dye having a methoxy group in the meta position to the amino group had the highest molar extinction coefficient ($\xi$), while a dye carrying chloro group in Ν-alkyl chains had the lowest $\xi$. The type of counter ions had no effect on spectral properties like the maximum absorption wavelength and $\xi$. All styryl dyes had exothermic peaks at decomposition in DSC curves. Among these styryl dyes, S2 series with perchlorate anions showed the strongest exothermic decomposition. From TGA spectra, S3 series with hexafluorophosphorate anions had the best thermal stability and the sharpest threshold at thermal decomposition.

• 한국안전학회지
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• 제10권4호
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• pp.47-59
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• 1995

The perchlorate, thiocyanate, and nitrate ion-selective PVC membrance electrode for measuring hazardous anion in waste water were developed by incorporating the quaternary ammonium salts as active material. Ion-selective characteristics in waste water were studied by the useful pH range, the selective coefficients to various interfering anions, and the stability of electrode potential. DBP was best as a plasticizer. The effect of the membrane thickness on the electrode characteristics was improved with decreasing the membrane thickness, but below the optimum membrane thickness the electrode exhibited an inverse trend. The electrode potential of perchlorate, thiocyanate, and nitrate electrode with TDDA, as active material, was stable within the pH range 4-11, 3-12, and 4-10 repectively. And the long-term potential stability of these electrodes were 3.0, 3.5, and 3.5 months respectively. The order of the selectivity coefficients was as shown below ; $ClO_4{^-}$ > $SCN^-$ > $I^-$ > $NO_3{^-}$ > $Br^-$ > $CN^-$ > $F^-$ > $Cl^-$ > $Ac^-$ > $H_2PO_4{^-}$, $SO_4{^-}$.

• 센서학회지
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• 제21권1호
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• pp.13-20
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• 2012

Due to its high conductivity, pyrylium has been frequently used in electron transfer reactions or in the synthesis of various organic materials. It has also been used as a sensor material. Traditionally, the compounds have been synthesized using various methods; mostly in a multiple steps. In this study, two pyrylium salts, 2, 6-di-(4'-methylphenyl) pyrylium fluoroborate and perchlorate were synthesized. The synthesis of these products was confirmed by 1H-NMR, LC/TOF-MS and FT-IR analyses while their photo-properties were analyzed using UV/VIS spectrophotometry. In addition, the electron transfer capacities of the salts were analyzed with a conductivity meter, it was found that their electron conductivities were high. When the synthesized compounds were dissolved in acetone, a green fluorescent material was observed to form. The fluorescent material can be used as a sensitizer in the electrical industry.

• 대한핵의학회지
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• 제15권1호
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• pp.37-43
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• 1981

Congenital hypothyroidism due to organification defect was first reported by Haddad and Sidbury in 1959. The organification defect is easily proved by perchlorate discharge test. We experienced a patient who had large goiter, growth and mental retardation, and revealed positive reponse to perchlorate discharges test, and the surgical biopsied specimen showed Huerthle cell adenoma, which was probably due to chronic stimulation of thyroid stimulating hormone, or coexisted incidentally. Described here a case of congenital hypothyroidism due to organification defect associated with Huerthle cell adenoma, with review of some literatures.

• 분석과학
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• 제8권4호
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• pp.511-517
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• 1995

A cationic water soluble porphyrin (5,10,15,20-tetrakis (l-methyl-pyridinium-4-yl)porphyrin, $H_2tmpyp^{4+}$) and its metalloporphyrins (MP) were easily extracted into acetonitrile separated by addition of sodium chloride ($4mol\;dm^{-3}$) in the presence of sodium perchlorate, where M denotes $Zn^{2+}$, $Cu^{2+}$, $Co^{3+}$, $Fe^{3+}$, and $Mn^{3+}$ and $P^{2-}$ is porphyrinate ion. The extracted ion-pair complexes were completely dissociated to $[MP(ClO_4)_3]^+$, and $[MP(ClO_4)_2]^{2+}$. The extraction and the dissociation constants were determined by taking into account of the partition constant of sodium perchlorate ($K_D=1.82{\pm}0.01$). The chemical properties of the separated acetonitrile phase as $E_{T(30)}$ and $D_{II,I}$ were determined and compared with other water miscible solvents (acetone, actonitrile, 1,4-dioxane, tetrahydrofuran, 1-propanol and 2-propanol). Furthermore, a sensitive and selective method was proposed for the determination of a subnanogram amount of copper(II) in natural water samples by using the present salting-out method and the porphyrins.