• 제목/요약/키워드: Indium(III) chloride

검색결과 9건 처리시간 0.02초

One-Pot Synthesis of 2H-Pyrans by Indium(III) Chloride-Catalyzed Reactions.Efficient Synthesis of Pyranocoumarins, Pyranophenalenones, and Pyranoquinolinones

  • Lee, Yong-Rok;Kim, Do-Hoon;Shim, Jae-Jin;Kim, Seog K.;Park, Jung-Hag;Cha, Jin-Soon;Lee, Chong-Soon
    • Bulletin of the Korean Chemical Society
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    • 제23권7호
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    • pp.998-1002
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    • 2002
  • An efficient synthesis of 2H-pyrans is achieved by indium (III) chloride-catalyzed reactions of 1,3-dicarbonyl compounds with a variety of $\alpha\beta-unsaturated$, aldehydes in moderate yields. This method has been applied to the synthesis of pyranocoumar ins, pyranophenalenones, and pyranoquinolinone alkaloids.

An Efficient Synthesis of Substituted Quinolines via Indium(III) Chloride Catalyzed Reaction of Imines with Alkynes

  • Zhu, Mei;Fu, Weijun;Xun, Chen;Zou, Guanglong
    • Bulletin of the Korean Chemical Society
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    • 제33권1호
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    • pp.43-47
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    • 2012
  • An efficient synthetic method for the preparation of quinolines through indium(III) chloride-catalyzed tandem addition-cyclization-oxidation reactions of imines with alkynes was developed. The processes can provide a diverse range of quinoline derivatives in good yields from simple imines and alkynes.

A Solid-Contact Indium(III) Sensor based on a Thiosulfinate Ionophore Derived from Omeprazole

  • Abbas, Mohammad Nooredeen;Amer, Hend Samy
    • Bulletin of the Korean Chemical Society
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    • 제34권4호
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    • pp.1153-1159
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    • 2013
  • A novel solid-contact indium(III)-selective sensor based on bis-(1H-benzimidazole-5-methoxy-2-[(4-methoxy-3, 5-dimethyl-1-pyridinyl) 2-methyl]) thiosulfinate, known as an omeprazole dimer (OD) and a neutral ionophore, was constructed, and its performance characteristics were evaluated. The sensor was prepared by applying a membrane cocktail containing the ionophore to a graphite rod pre-coated with polyethylene dioxythiophene (PEDOT) conducting polymer as the ion-to-electron transducer. The membrane contained 3.6% OD, 2.3% oleic acid (OA) and 62% dioctyl phthalate (DOP) as the solvent mediator in PVC and produced a good potentiometric response to indium(III) ions with a Nernstian slope of 19.09 mV/decade. The constructed sensor possessed a linear concentration range from $3{\times}10^{-7}$ to $1{\times}10^{-2}$ M and a lower detection limit (LDL) of $1{\times}10^{-7}$ M indium(III) over a pH range of 4.0-7.0. It also displayed a fast response time and good selectivity for indium(III) over several other ions. The sensor can be used for longer than three months without any considerable divergence in potential. The sensor was utilized for direct and flow injection potentiometric (FIP) determination of indium(III) in alloys. The parameters that control the flow injection method were optimized. Indium(III) was quantitatively recovered, and the results agreed with those obtained using atomic absorption spectrophotometry, as confirmed by the f and t values. The sensor was also utilized as an indicator electrode for the potentiometric titration of fluoride in the presence of chloride, bromide, iodide and thiocyanate ions using indium(III) nitrate as the titrant.

Effects of post anneal for the INZO films prepared by ultrasonic spray pyrolysis

  • Lan, Wen-How;Li, Yue-Lin;Chung, Yu-Chieh;Yu, Cheng-Chang;Chou, Yi-Chun;Wu, Yi-Da;Huang, Kai-Feng;Chen, Lung-Chien
    • Advances in nano research
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    • 제2권4호
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    • pp.179-186
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    • 2014
  • Indium-nitrogen co-doped zinc oxide thin films (INZO) were prepared on glass substrates in the atmosphere by ultrasonic spray pyrolysis. The aqueous solution of zinc acetate, ammonium acetate and different indium sources: indium (III) chloride and indium (III) nitrate were used as the precursors. After film deposition, different anneal temperature treatment as 350, 450, $550^{\circ}C$ were applied. Electrical properties as concentration and mobility were characterized by Hall measurement. The surface morphology and crystalline quality were characterized by SEM and XRD. With the activation energy analysis for both films, the concentration variation of the films at different heat treatment temperature was realized. Donors correspond to zinc related states dominate the conduction mechanism for these INZO films after $550^{\circ}C$ high temperature heat treatment process.

Rapid and Efficient Debromination of vic-Dibromides with VCl3/Indium System

  • Yoo, Byung Woo;Park, Jee Yeon;Shin, Hyo Jong
    • 대한화학회지
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    • 제62권4호
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    • pp.275-278
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    • 2018
  • The $VCl_3$/In system was found to be a new protocol for debromination of a variety of vic-dibromides to the corresponding alkenes in high yields with short reaction times under mild conditions. This new methodology is highly chemoselective, tolerating several functional groups such as chloro, bromo, fluoro, keto, ester, carboxyl, and methoxy groups.

III-V족 화합물 반도체 InSb 나노와이어의 전기화학적 합성 및 특성 평가 (Electrochemical Formation and Characterization of III-V Compound Semiconductor InSb Nanowires)

  • 이관희;이종욱;박호동;정원용;이종엽
    • 전기화학회지
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    • 제8권3호
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    • pp.130-134
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    • 2005
  • 본 연구에서는 그동안 전기화학적으로 합성되지 못했던 III-V족 화합물 반도체 InSb를 구연산 용액으로부터 합성하였으며 자체 제조한 AAO를 나노템플릿으로 이용하여 정전압 도금을 실시하여 InSb 나노와이어를 제조하였다 제조된 InSb나노와이어는 X선 회절분석 결과 단결정의 나노와이어는 아니었으나 정확하게 화학양론을 만족시키는 화합물임을 확인하였고, 평판 박막 상태의 InSb와는 달리 나노와이어의 길이방향으로 (220) 방향의 결정이 주로 성장하는 우선결정방위를 가지고 있음을 알 수 있었다. 또한 집합적으로 배열된 상태에서 측정된 I-V특성 곡선에서는 n형 반도체의 특성을 보이되 밴드갭이 좁고, 전자이동도가 큰 InSb고유의 특성상 반금속과 유사한 전기적 특성을 보유하고 있음을 확인하였다.

Indium(III) Chloride Mediated Michael Addition of Indoles to Ketene S,S-Acetals: Synthesis of Bis- and Tris-indolylketones

  • Singh, Thokchom Prasanta;Khan, Ruhima;Noh, Young Ri;Lee, Sang-Gyeong;Singh, Okram Mukherjee
    • Bulletin of the Korean Chemical Society
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    • 제35권10호
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    • pp.2950-2954
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    • 2014
  • A series of bis and tris-indolylketones and meridianin alkaloids are prepared by one pot Michael reaction of indole and ketene S,S-acetals under solvent-free condition using mild Lewis acid $InCl_3$.

혼합소스 HVPE에 의해 성장된 In(Al)GaN 층의 특성 (Characterization of In(Al)GaN layer grown by mixed-source hydride vapor phase epitaxy)

  • 황선령;김경화;장근숙;전헌수;최원진;장지호;김홍승;양민;안형수;배종성;김석환
    • 한국결정성장학회지
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    • 제16권4호
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    • pp.157-161
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    • 2006
  • 혼합소스 HVPE(hydride vapor phase epitaxy) 방법을 이용하여 InGaN 층을 GaN 층이 성장된 사파이어 (0001) 기판 위에 성장하였다. InGaN 층을 성장하기 위해 금속 In에 Ga을 혼합하여 III족 소스로 이용하였으며 V족 소스로는 $NH_3$를 이용하였다. InGaN층은 금속 In에 Ga을 혼합한 소스와 HCl을 흘려 반응한 In-Ga 염화물이 다시 $NH_3$와 반응하도록 하여 성장하였다. XPS 측정을 통해 혼합소스 HVPE 방법으로 성장한 층이 InGaN 층임을 확인할 수 있었다. 선택 성장된 InGaN 층의 In 조성비는 PL과 CL을 통해서 분석하였다. 그 결과 In 조성비는 약 3%로 평가되었다. 또한, 4원 화합물인 InAlGaN 층을 성장하기 위해 In 금속에 Ga과 Al을 혼합하여 III족 소스로 사용하였다. 본 논문에서는 혼합소스 HVPE 방법에 의해 III족 소스물질로 금속 In에 Ga(Al)을 혼합한 소스를 이용하여 In(Al)GaN층을 성장할 수 있음을 확인할 수 있었다.