title: Novel electrochemical method for the characterization of the degree of chirality in chiral polyaniline.
abstract: A novel method to indicate the degree of chirality in polyaniline (PANI) was developed. The (D-camphorsulfonic acid)- and (HCl)-PANI-based electrodes exhibited significantly different electrochemical performances in D- and L-Alanine (Ala) aqueous solution, respectively, which can be used for the characterization the optical activity of chiral PANI. Cyclic voltammogram, tafel, and open circuit potential of PANI-based electrodes were measured within D- and L-Ala electrolyte solution, respectively. The open circuit potentials under different reacting conditions were analyzed by Doblhofer model formula, in which [C(+)](poly1)/[C(+)](poly2) was used as a parameter to characterize the degree of chirality in chiral PANI. The results showed that [C(+)](poly1)/[C(+)](poly2) can be increased with increasing concentrations of (1S)-(+)- and (1R)-(-)-10-camphorsulfonic acid. In addition, we detected that appropriate response time and lower temperature are necessary to improve the degree of chirality.
authors.affiliation: College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, People's Republic of China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Feng
authors.forename: Ma
authors.initials: M
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Yan
authors.forename: Tang
authors.initials: T
authors.lastname: Jihai
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.forename: Li
authors.initials: L
authors.lastname: Wanglin
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D013237:Stereoisomerism
chemical_list: D000814:Aniline Compounds; C416807:polyaniline