Abstract
A study of Langmuir-Blodgett films of the 1:1 charge transfer salt N-octadecylpyridinium-tetracyanoquinodimethane using X-ray photoelectron spectroscopy is reported. Examination of the nitrogen spectrum reveals three distinct environments for this atom, which are interpreted as corresponding to negatively-charged, neutral and positively-charged species. It is suggested that the presence of the neutral nitrogen accounts for the (relatively) high in-plane electrical conductivity that is observed for the as-deposited films.
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