Construction of and electrophoretic fluorescence imaging with a nano-porous polyaniline-fluorescein conducting particle system

摘要

Electrophoretic fluorescence images have been fabricated by deposition of nanoporous polyaniline-fluorescein conducting particles onto a micro-patterned polyaniline film.rnFluorescein molecules in aqueous solution can exist in one of four possible prototropic forms (cation, neutral, monoanion, and dianion) depending on pH. Moreover, the neutral dye has three possible tautomeric forms, including the lactonic, cetonic, and zwitterionic tautomers. Recently, various fluorescein derivatives, named Tokyo Green (TG), in which methyl or methoxy groups are present on the xanthene moiety, have been synthesized. These derivatives hold great promise as fluorophores in on/off fluorescence probes since they are highly fluorescent at basic pH values (anion form of the xanthene moiety) and have near zero quantum yields in the acidic pH region (protonated form of the xanthene moiety).