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KMID : 1059519840280020114
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Journal of the Korean Chemical Society
1984 Volume.28 No. 2 p.114 ~ p.120
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Molecular Oxygen in Solid State of Polymeric Tetraphenylporphinatocobalt(II)
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Chae Hee-Kwon
Han Chong-Soo
Chon Hak-Ze
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Abstract
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The reversible oxygenation of a solid stae polymeric cobalt(Ⅱ) porphyrin complex, PVP-CoTPP was studied at 0, -24 and -78℃. When PVP-CoTPP was contacted with O2 at -78℃ the oxygen uptake increased with oxygen partial pressure. At about 700mmHg O2, the amount of oxygen taken up corresponded approximately one oxygen molecule to one Co(Ⅱ) complex. The amount of O2 taken up by PVP-CoTPP decreased with increasing temperature. When 16O2 was admitted to the Co(Ⅱ) complex a EPR signal corresponding to O2- increased with a decrease in Co(Ⅱ) signal. The results suggest that an electron is transfered from Co(Ⅱ) in PVP-CoTPP to oxygen forming a Co(Ⅲ)-O2- complex where O2- is superoxide type.
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