Molecular Oxygen in Solid State of Polymeric Tetraphenylporphinatocobalt(II)

고분자로 지지된 코발트(II) 테트라페닐포피린 화합물에서의 산소분자에 관한 연구

  • Chae Hee Kwon (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Chong Soo Han (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Hakze Chon (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • 채희권 (한국과학기술원 화학과) ;
  • 한종수 (한국과학기술원 화학과) ;
  • 전학제 (한국과학기술원 화학과)
  • Published : 1984.04.20

Abstract

The reversible oxygenation of a solid stae polymeric cobalt(II) porphyrin complex, PVP-CoTPP was studied at 0, -24 and $-78^{\circ}C$. When PVP-CoTPP was contacted with $O_2 $at$-78^{\circ}C$ the oxygen uptake increased with oxygen partial pressure. At about 700mmHg $O_2$, the amount of oxygen taken up corresponded approximately one oxygen molecule to one Co(II) complex. The amount of $O_2$ taken up by PVP-CoTPP decreased with increasing temperature. When $16O_2$ was admitted to the Co(II) complex a EPR signal corresponding to $O_2^-$ 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 $Co(III)-O_2^-$ complex where $O_2^- $is superoxide type.

Keywords

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