VAPOR STATE INTERCALATION OF ALKALI-METALS INTO POLYPARAPHENYLENE - ESR STUDY

The ESR characteristics of saturated alkali metal intercalated polypar aphenylene compounds [M(y)(C6H4)](x) With M = Na, K, Rb, Cs, were exam ined as a function of the nature of the intercalant and temperature. T he peak-to-peak linewidth, Delta H-pp, follows a Z(alpha) law (Z = ato mic number of M) with alpha = 2.3 +/- 0.3. Evolution of Delta H-pp wit h temperature T and atomic number Z shows that these compounds behave like metals and that the spin orbit interaction is the major cause of the broadening of the ESR signals.