EPR Studies of Carbonized Cellulose — Oxygen Interactions


EPR examination of cellulose carbonized at 400◦C and 600◦C has been performed. The aim of this work was to search a sample useful as the oximetric probe in biology and medicine. The higher paramagnetic centers concentration characterizes cellulose carbonized at 600◦C, which was found as the sensitive oximetric probe. Quasi-chemical bonds between cellulose molecules and paramagnetic O2 molecules decrease paramagnetic centers concentration. A linear increase in paramagnetic centers concentration and a linear decrease in EPR linewidth with increasing time of sample evacuation were observed for cellulose carbonized at 600◦C. Oxygen affects spin–lattice interactions in carbonized cellulose.

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@inproceedings{Pilawaa2005EPRSO, title={EPR Studies of Carbonized Cellulose — Oxygen Interactions}, author={B. Pilawaa and R. H. Pietrzak and Helena Wachowska}, year={2005} }