NEAR-INFRARED ABSORPTION-SPECTRA OF C-60 RADICAL CATIONS AND ANIONS PREPARED SIMULTANEOUSLY IN SOLID ARGON

The codeposition of C60 vapor with excess argon and argon resonance radiation has produced strong new absorptions at 973 and 1068 nm in solid argon at 11 +/- 1 K. A similar experiment with CCl4 added to serve as an electron trap reduced the yield of the 1068-nm band with little effect on the 973-nm absorption. The 973-nm band is assigned to C60.+ produced by photoionization and the 1068-nm band to C60.- formed by electron capture. These identification are in excellent agreement with glassy matrix, solution, and photoelectron spectra.