Portal de Periódicos da CAPES

Charge transfer in stage-1 OsF 6 - and MoF 6 -…

1987; American Physical Society; Volume: 35; Issue: 9 Linguagem: Inglês

10.1103/physrevb.35.4522

1095-3795

I. Ohana, David Vaknin, H. Selig, Y. Yacoby, D. Davidov,

Fiber-reinforced polymer composites

The charge transfer per carbon atom has been studied in stage-1 ${\mathrm{C}}_{\mathrm{n}}$${\mathrm{OsF}}_{6}$ and ${\mathrm{C}}_{\mathrm{n}}$${\mathrm{MoF}}_{6}$. Optical reflection measurements in the range 0.8--3 eV yield a charge transfer per carbon atom of ${f}_{C(\mathrm{elec})=0.035}$ and 0.029, respectively. The shifts in the energy of the Raman lines with the symmetry are correlated with a difference of 0.01 in the electronic charge transfer per carbon for these compounds. These results are compared with recent ESR susceptibility measurements on these compounds which yield the chemical charge transfer per intercalated M${\mathrm{F}}_{6}$ (M=Os,Mo) molecule. These were ${f}_{M(\mathrm{chem})=1}$ and 0.2, respectively. The large discrepancy for ${\mathrm{C}}_{\mathrm{n}}$${\mathrm{OsF}}_{6}$ (${f}_{M(\mathrm{chem}):{f}_{M(\mathrm{elec})=3:1}}$) indicates a rather strong interaction between the carbon atoms and the fluorine atoms of the intercalate.