Abstract
The pulse d.c. photoconductivity (PC) of nitrobenzene (NB), orthometa- and para-dinitrobenzenes and symmetric trinitrobenzene in tetrahydrofuran, ethyl ether and 1,4-dioxane has been examined. Measurements of the flash-induced PC revealed that the effects are caused by the monophotonic ionic photodissociation process in these n-π EDA systems and that their magnitude depends on both the polarity of the ethers and the electron acceptor properties of the nitrobenzenes. As expected, the stronger the acceptor and the more polar the ether were the more pronounced were the effects observed. The PC signals were quenched not only by oxygen but surprisingly also by the strong electron π donor pyrene, for which some preliminary results are presented.
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