• 제목/요약/키워드: Copper complex

검색결과 394건 처리시간 0.032초

아세토니트릴 용매 중에서 Copper-1-(2-Thiazolylazo)-2-naphthol 착물의 전기화학적 거동 (Electrochemical Behaviors of Copper-1-(2-Thiazolylazo)-2-naphthol Complex in Acetonitrile)

  • 배준웅;이흥락;박태명;서무룡
    • 대한화학회지
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    • 제35권4호
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    • pp.405-409
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    • 1991

  • 비양성자성용매인 아세토니트릴 중에서 Copper-1-(2-thiazolylazo)-2-naphthol(이하 Cu(II)-TAN으로 줄임) 착물의 전기화학적 성질을 조사하였다. 착물의 직류폴라로그램으로부터 환원전류의 유형과 가역성 및 양성자 주게인 물의 첨가에 따른 영향을 검토하였다. 그리고 환원반응에 관여한 전자수는 일정전위 전기분해법으로 구하였다. 또 일정전위 전기분해한 전해생성물의 UV-Vis Spectrum으로부터 전해생성물을 확인하였다. 이상의 실험 결과로부터 아세토니트릴 용매 중에서 Cu(II)-TAN 착물은 3단계의 환원과정을 거쳐 최종적으로 아민화합물이 됨을 알았다. 이 때 1단계 환원과정에서는 anion radical이 생성되는 과정이고, 2단계 환원과정에서는 dianion이 생성되는 과정이다. 또 1단계와 2단계의 환원과정은 모두 가역성이 좋은 편이었으나 3단계 환원과정은 가역성이 매우 나쁜 편이었다. 또한 각 단계의 환원전류는 확산지배적이었다.

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Template Synthesis, Crystal Structure, and Magnetic Properties of a Dinuclear Copper(II) Complex with Cooperative Hydrogen Bonding

  • Kang, Shin-Geol;Nam, Kwang-Hee;Min, Kil-Sik;Lee, Uk
    • Bulletin of the Korean Chemical Society
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    • 제32권3호
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    • pp.1037-1040
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    • 2011

  • The dinuclear complex 1 with cooperative hydrogen bonds can be prepared by the metal-directed reaction of Eq. (2). This work shows that the coordinated hydroxyl group trans to the secondary amino group is deprotonated more readily than that trans to the tertiary amino group and acts as the hydrogen-bond accepter. The lattice water molecules in 1 act as bridges between the two mononuclear units through hydrogen bonds. The complex is quite stable as the dimeric form even in various polar solvents. The complex exhibits a weak antiferromagnetic interaction between the metal ions in spite of relatively long Cu$\cdots$Cu distance. This strongly supports the suggestion that the antiferromagnetic behavior is closely related to the cooperative hydrogen bonds.

  • https://doi.org/10.5012/bkcs.2011.32.3.1037 인용 PDF KSCI

Complexing Capacity - A Measure of Evaluating Water Quality

  • Akaiwa, Hideo;Itabashi, Hideyuki
    • 분석과학
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    • 제8권4호
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    • pp.1089-1094
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    • 1995

  • Methods for the measurement of copper(II) complexing capacity (CuCC) of natural waters by using the back-extraction of bis(benzoyl-trifluoroacetonate)copper(II) and the extraction rate of dithizonato-copper(II) complex were described. Experimental results show that the CuCC of the Kiryu river water samples from urban area were consistently larger than those from up-stream, due to a ligand which originated from human activities.

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N,N-Dimethylformamide 용액 중에서 Zn(II)-Bilirubin 착물의 전기화학적 거동 (Electrochemical Behavior of Zn(II)-Bilirubin Complex in N,N-Dimethylformamide)

  • 배준웅;이흥락;박태명;서무룡
    • 대한화학회지
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    • 제37권7호
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    • pp.672-676
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    • 1993

  • DMF 용액 중에서 zinc(II) 이온과 copper(II) 이온의 bilirubin과의 착물형성 여부를 조사하고 Zn(II)-bilirubin(이하 Zn(II)-BR로 줄임) 착물의 전기화학적 성질을 여러가지 전기화학적인 방법으로 조사하였다. Zn(II)는 DMF 용액 중에서 bilirubin과 착물을 형성하였으나, Cu(II)는 bilirubin과 착물을 형성하지 않고 오히려 bilirubin의 산화를 촉진시켰다. Zn-BR 착물은 3단계의 환원과정을 거치며, 제1파와 제2파의 환원전류는 반응성 전류가 약간 포함된 환산전류이었으며, 제3파의 환원전류는 확산지배적인 전류이었다.

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Transfer of Cupric Sulfate across Rat Small Intestine, in Vitro and Effect of Chelating Agents on It's Transfer

  • Kim, Chong-Kil;Choi, Seung-Gi;Rho, Young-Soo
    • Archives of Pharmacal Research
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    • 제11권2호
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    • pp.81-86
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    • 1988

  • The transfer of cupric sulfate across the rat small intestine in vitro was studied by perfusion method using the segments of everted rat small intestine. Copper transport was approximately propotional to the metal concentration in the mucosal solution and no difference was observed in the metal transport among rat duodenum, jejunum and ileum. It was suggested from these results that copper transport across the rat small intestine would occur by passive diffusion. The effect of various chelating agents on copper transport across the rat small intestine n vitro and its uptake by the intestine were also studied. Copper transport was greatly enhanced in the presence of EDTA and NTA. Copper uptake decreased to a greater extent in the presence of EPTA and NTA.

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