• 제목/요약/키워드: Inorganic chemistry

검색결과 727건 처리시간 0.028초

일산화탄소탈수소화효소를 이용한 이산화탄소의 전기화학적 환원에 미치는 pH와 온도의 영향 (Effect of pH and Temperature on the Electrochemical Reduction of Carbon Dioxide by Carbon Monoxide Dehydrogenase)

  • 신준원;김유성;이상희;이상필;이호준;임미란;송지은;신운섭
    • 전기화학회지
    • /
    • 제10권4호
    • /
    • pp.265-269
    • /
    • 2007
  • 일산화탄소탈수소화효소를 이용한 이산화탄소의 전기화학적 환원 반응의 최적화를 위해 pH와 온도의 영향을 살펴보았다. pH는 이산화탄소의 환원반응 용이성과 효소의 안정도 효과가 함께 반영되는 6.3에서 최적의 조건을 보였고, 온도는 이산화탄소의 용해도가 적어지더라도 효소의 활성이 가장 좋은 60도에서 최적 조건을 보였다. 일산화탄소탈수소화효소의 안정성 및 활성이 가장 중요한 조건임을 알 수 있었다.

Sandwich Intermediate Sitting-atop Complexation between Free Base meso-tetraarylporphyrins and Tellurium(IV) chloride

  • Dehghani, Hossein;Bakhshayesh, Sara;Shaterian, Maryam;Motamedi, Leila
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권4호
    • /
    • pp.815-818
    • /
    • 2010
  • Free base meso-tetraarylporphyrins ($H_2T(X)PP$) react with tellurium(IV) chloride ($TeCl_4$) in mild conditions for formation sandwich intermediate sitting-atop (i-SAT) complexes, [$TeCl_4(H_2T(X)PP)_2$]. $^1H$ NMR, $^{13}C$ NMR, UV-vis, FT-IR and elemental analysis were used for characterization of the products. In the proposed structure of the i-SAT complexes, four pyrroles of each porphyrin ring are tilted alternatively up and down and this appropriates suitable orientation of lone pairs of two pyrrolenine nitrogens for electron donation to a tellurium center. $^1H$ NMR and FT-IR results showed that in the produced complex, hydrogen atoms of porphyrin macrocycles remained on the pyrrole nitrogens.

Cadmium Sulphide Nanorods: Synthesis, Characterization and their Photocatalytic Activity

  • Giribabu, Krishnamoorthy;Suresh, Ranganathan;Manigandan, Ramadoss;Vijayaraj, Arunachalam;Prabu, Raju;Narayanan, Vengidusamy
    • Bulletin of the Korean Chemical Society
    • /
    • 제33권9호
    • /
    • pp.2910-2916
    • /
    • 2012
  • Cadmium sulphide (CdS) nanorods were prepared by a single precursor thermal decomposition (SPTD) method. The formation of CdS nanorods and their structure, morphology and elemental composition were studied by means of FT-IR, XRD, FE-SEM, HR-TEM and EDAX analysis. Photoluminescence (PL) and lifetime measurements were recorded to study the luminescence properties of the material. The PL spectrum of the CdS nanorods showed one broad peak and four shoulders and the cause for this emission was discussed. The PL emissions from the band edge and deep trap state of the CdS nanorods were studied by lifetime measurements. Further, the synthesized CdS nanorods showed an increase in efficiency of photocatalytic degradation of methylene blue (MB) and rhodamine B (RhB). The increase in the photocatalytic activity was attributed to the mixed phase of the CdS nanorods.

Poly(anthranilic acid) Microspheres: Synthesis, Characterization and their Electrocatalytic Properties

  • Ranganathan, Suresh;Raju, Prabu;Arunachalam, Vijayaraj;Krishnamoorty, Giribabu;Ramadoss, Manigandan;Arumainathan, Stephen;Vengidusamy, Narayanan
    • Bulletin of the Korean Chemical Society
    • /
    • 제33권6호
    • /
    • pp.1919-1924
    • /
    • 2012
  • Poly(anthranilic acid) was synthesized by rapid mixing method using 5-sulphosalicylic acid as a dopant. The synthesized polymer was characterized by various techniques like FT-IR, UV-Visible, and X-ray diffraction $etc.$, The FT-IR studies reveal that the 5-sulphosalicylic acid is well doped within the polymer. The morphological property was characterized by field emission scanning electron microscopic technique. The electrochemical properties of the polymer were studied by cyclic voltammetric method. The synthesized polymer was used to modify glassy carbon electrode (GCE) and the modified electrode was found to exhibit electrocatalytic activity for the oxidation of uric acid (UA).

무전해 도금에 의한 수직자기 박막제조시의 착화제의 영향 (Influences of Complexing Agents on the Formation of the Perpendicular Magnetic Film by the Electroless Plating)

  • 김영우;박정일;박광자;김조웅;함용묵;이주성
    • 한국표면공학회지
    • /
    • 제20권4호
    • /
    • pp.135-143
    • /
    • 1987
  • Various complexing agents were investigated to see the effects on the normal orientation of HCP structure of Co-alloy to the film plane in ammoniacal electroless plating bath. To obtain the optimum condition, several complexing agents were investigated to compare the C-axis perpendicular orientation. Results were that succinate - citrate, malonate - succinate, malonate bath were useful for that purpose. Among these complexing agents, succinate - citrate system was obtained as the best one. X-ray diffraction patterns were used to compare the film properties with C-axis perpendicular orientation.

  • PDF