Persistent contact ion pairs (CIPs) have been obtained by one-photon-induce
d electron transfer from N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) to
tetrachloromethane (CCl4) in solid argon, in addition to TMPD.* free radic
al cations (FRCs) generated by two-photon ionization of TMPD as the primary
process. The first UV/VIS absorption band of the CIPs is tentatively expla
ined on the basis of the corresponding band of the FRCs. (C) 2000 Elsevier
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