Abstract
AbstractA chiroptical conjugated polymer, poly(2,2′‐bis[3,4‐ethylenedioxythiophene]‐alt‐fluorene) (poly[E‐Flu]), was synthesized by electrochemical polymerization in a hydroxypropyl cellulose (HPC) based cholesteric liquid crystal (CLC) electrolyte solution. Subsequent poly(E‐Flu) characterization was conducted using polarizing optical microscopy and atomic force microscopy, as well as electrochemical, spectroscopic, and electron spin resonance (ESR) measurements. Surface observations reveal that the poly(E‐Flu) film has a fingerprint texture, which is typical optical textures of CLCs exposed to cross‐polarization. Fingerprint texture of poly(E‐Flu) indicates that the transcription of the CLC helical structure from the CLC electrolyte solution to the conjugated polymer has occurred during the electrochemical polymerization reaction. Optical rotation dispersity and circular dichroism (CD) spectra indicated that poly(E‐Flu) is optically active and that its optical activity is reversibly changed in the electrochemical redox processes.
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