Abstract
A spectrofluorimetric method is proposed for the study of chemically prepared and electrosynthesized poly( N-vinylcarbazole) (PVCA) films on Pt thin layers. Solid-state fluorescence excitation and emission spectra of PVCA are obtained at room temperature. The effects of electrochemical doping and polymer film growth on fluorescence spectral properties are investigated. ClO − 4 electrochemical doping of PVCA films causes fluorescence quenching. In situ measurements of the changes in fluorescence intensity of PVCA films during electrochemical cycles are described. The sensitivity of the spectrofluorimetric method is very high for the quantitative determination of polymer films, with a detectable minimal mass of about 2.5 × 10 −10 mol cm −2 of PVCA, corresponding approximately to the equivalent of a monolayer.
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