• 제목/요약/키워드: Chelating

검색결과 723건 처리시간 0.032초

네자리 리간드를 갖는 코발트(III) 착물에 관한 연구 (Studies on the Synthesis of Cobalt(III) Complexes with Quadridentate)

  • 오준석;이원
    • 대한화학회지
    • /
    • 제12권1호
    • /
    • pp.12-17
    • /
    • 1968
  • A series of octahedral cobalt(III) complexes involving quadridentate bissalicylaldehyde ethylenediimine (SAED) chelating ligand have been prepared as a new compound: [$Co(SAED)X_2]^+,$ where X = ammonia, pyridine, and bidentate ethylenediamine. Properties and configuration of the complexes were studied by the chemical and physical method.

  • PDF

Thiocatechol 및 그 유도체의 합성과 산해리 정수 (Synthesis of Thiocatechols and Acid Dissociation Constants)

  • 오준석;이광우;김택제
    • 대한화학회지
    • /
    • 제12권1호
    • /
    • pp.1-3
    • /
    • 1968
  • New chelating ligands, thiocatechol and p-chlorothiocatechol, have been synthesized and the acid dissociation constants were determined by potentiometric method in 50% dioxane-water; $pK_1 \;and\; pK_2$ were 7.28, 10.97 for thiocatechol and 6.37, 10.22 for p-chlorothiocatechol, respectively. Color reactions with various metal ions were studied. It was found that the above ligands are specific for Bi(III), Mo(VI) and W(VI) as an analytical reagent.

  • PDF

Multiform Oxide Optical Materials via the Versatile Pechini-type Sol-Gel Process

  • Lin, J.
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
    • /
    • pp.1247-1250
    • /
    • 2008
  • This presentation highlights work from the authors' laboratories on the various kinds of oxide optical materials, mainly luminescence and pigment materials with different forms (powder, core-shell structures, thin film and patterning) prepared by the Pechini-type sol-gel (PSG) process. The PSG process which uses the common metal salts (nitrates, acetates, chlorides etc) as precursors and citric acid (CA) as chelating ligands of metal ions and polyhydroxy alcohol (such as ethylene glycol or poly ethylene glycol) as cross-linking agent to form a polymeric resin on molecular level, allowing the preparation of many forms of luminescent materials.

  • PDF

Evaluation of Antioxidant Activity of Essential Oil from Artemisia vulgaris

  • Bhatt, Lok Ranjan;Lee, Jae-Sug;Baek, Seung-Hwa
    • 동의생리병리학회지
    • /
    • 제21권2호
    • /
    • pp.528-531
    • /
    • 2007
  • Artemisia vulgaris essential oil exhibited a strong metal chelating activity but withlow reducing power, and radical scavenging activity. However, a gradual increase in the radical scavenging activity was obtained with increasing concentration and reaction time.

반도체 습식 세정 공정중 SC1 세정 용액에 킬레이팅 에이전트 첨가에 의한 오염 입자와 금속 오염물 제거 효과 (Removal of Particles and Metal Impurities by adding of Chelating Agent onto SC1 Cleaning Solution in Semiconductor Wet Cleaning Process)

  • 이승호;이상호;권태영;박진구;배소익;김인정;이건호
    • 한국재료학회:학술대회논문집
    • /
    • 한국재료학회 2005년도 춘계학술발표대회 및 제8회 신소재 심포지엄 논문개요집
    • /
    • pp.56-56
    • /
    • 2005
  • PDF