• 제목/요약/키워드: iodide

검색결과 756건 처리시간 0.025초

A Pyrenyl-Appended Triazole-Based Calix[4]arene as a Fluorescent Sensor for Iodide Ion

  • Kim, Jong-Seung;Park, Sun-Young;Kim, Sang-Hoon;Thuery, Pierre;Souane, Rachid;Matthews, Susan E.;Vicens, Jacques
    • Bulletin of the Korean Chemical Society
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    • 제31권3호
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    • pp.624-629
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    • 2010
  • The synthesis and evaluation of a novel calix[4]arene-based fluorescent chemosensor 1 for the detection of I. is described. The fluorescent changes observed upon addition of various anions show that 1 is selective for I. over other anions. Addition of I. results in ratiometric measurements with 1 : 1 complex ratio.

A study of the photovoltaic conversion efficiency of dye-sensitized solar cell depending on the area of electrolyte

  • 김동균;홍병유
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2009년도 추계학술대회 논문집
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    • pp.269-269
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    • 2009
  • 염료감응형 태양전지는 다공질 $TiO_2$ 전극막, 광감응형 염료, 전해질로 구성된 전기화학적 원리를 이용한 태양전지이다. 전해질은 전자가 빠져나간 염료에 전자를 공급하고 $PtCl_4$로부터 전자를 공급받아 산화/환원 반응을 한다. $PtCl_4$는 하부 기판에서 전자를 전해질에 제공한다. 본 연구에서는 Sealant를 이용하여 전해질의 면적이 효율에 어떤 영향을 미치는지 관찰하였다. AM 1.5 (100 $mW/cm^2$)하에서의 광 에너지로 측정한 효율은 전해질 면적이 1 $cm^2$ 일 때 가장 높은 4.46%의 효율이 나타났다.

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CuI Nanoparticles as New, Efficient and Reusable Catalyst for the One-pot Synthesis of 1,4-Dihydropyridines

  • Safaei-Ghomi, Javad;Ziarati, Abolfazl;Teymuri, Raheleh
    • Bulletin of the Korean Chemical Society
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    • 제33권8호
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    • pp.2679-2682
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    • 2012
  • A simple one-pot synthesis of two derivatives of 1,4-dihydropyridines has been described under reflux conditions using copper iodide nanoparticles (CuI NPs) as a catalyst in high yields. This method demonstrated four-component coupling reactions of aldehydes and ammonium acetate via two pathways. In one route, the reaction was performed using 2 eq ethyl acetoacetate while in the other one 1 eq ethyl acetoacetate and 1 eq malononitrile were used. The CuI NPs was reused and recycled without any loss of activity and product yield. It is noteworthy to state that wide range of the 1,4-dihydropyridines have attracted large interest due to pharmacological and biological activities.

Corrosion Inhibition of Aluminium using 3-Hydroxy flavone in the Presence of Quarternary Ammonium Salts in NaOH Medium

  • Princey, J. Morris;Nagarajan, Prabavathi
    • 대한화학회지
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    • 제56권2호
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    • pp.201-206
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    • 2012
  • The anticorrosive effect of 3-Hydroxyflavone (3HF) in combination with quarternary ammonium bromide and iodide salts (QAB and QAI) for aluminium corrosion in NaOH medium was studied at the temperature range of 303K-323K using weight loss study, potentiodynamic polarization study and impedance spectroscopic measurements. The results revealed that the inhibition efficiency increases with the inhibitor concentration and it further increases on the addition of quarternary ammonium bromide and iodide salts. The enhanced inhibition efficiency of the inhibitor in the presence of quarternary ammonium salts may be due to synergistic effect. The adsorption process of 3HF on the aluminium surface obeys Langmuir's adsorption isotherm. The mechanism of adsorption is further supported by Scanning Electron Microscopic study (SEM).