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KMID : 0385519950080010055
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Analytical Science & Technology
1995 Volume.8 No. 1 p.55 ~ p.62
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Studies on Electroanalytical cheristry for the Oxygen Adducted Tetradentate Schiff base Cobalt(Ⅲ) Complexes in Pyridine Solution
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Rim Chae-Pyeong
Chae Hee-Nam
Chjo Ki-Hyung
Choi Yong-Kook
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Abstract
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Tetradentate Schiff base cobalt(Ⅱ) complexes such as Co(Ⅱ)₂ N, N-bis (salicylidene)-m-phenylendiimine: [Co(Ⅱ)₂(SMPD)₂(H₂0)₄] and Co(Ⅱ)₂-N, N-bis (salicylidene) -p-phenylendiimine: [Co(Ⅱ)₂(SPPD)₂(H₂0)₄], and oxygen adducted cobalt (Ⅲ) complexes such as [Co(Ⅲ)₂O₂(SMPD)₂(Py)₂] and [Co(Ⅲ)₂O₂(SPPD)₂(Py)z] in pyridine solutions were synthesized. It was identified that the oxygen adducted cobalt(Ⅲ) complexes have hextacoordinated octahedral configuration with pyridine and oxygen from the measurement of elemental analysis, AA, IR spectra, and TGA. The redox processes were investigated for the oxygen adducted complexes in 0.1M TEAP-pyridine solution, using cyclic voltammetry on the glassy carbon electrode. The redox processes of oxygen adducted cobalt(Ⅲ) complexes result in [Co(Ⅲ)₂-O₂-Co(Ⅲ)] e-->[Co(Ⅲ)₂-O₂-Co(Ⅱ)]e- -> [Co(II)-O₂Co(II)]e- ⇔[Co(Ⅱ)+Co(Ⅱ)+O₂-] e- ⇔[Co(Ⅱ)+Co(I)+O₂]
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KEYWORD
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Schiff base cobalt(Ⅱ)complex, Catalytic effect
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