ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Raman study of PANI thin film during long time period in dependence on storage conditions

Pavlína Peikertová, Lenka Kulhánková, Lucie Neuwirthová, and Jonáš Tokarský

Nanotechnology Centre, VŠB-Technical University of Ostrava, Ostrava, Czech Republic

E-mail: pavlina.peikertova@vsb.cz

Abstract: Conducting polymer polyaniline which is nowadays in forefront of the interest was in our study prepared in a form of thin films from anilinium sulfate by its chemical oxidation using ammonium peroxydisulfate. During the oxidation process, the polyaniline was deposited on glass slides and immersed into reaction mixture. Two sets of polyaniline thin films were prepared with different oxidation times (10, 20, 30, and 40 min). The first set was kept dry in desiccator and the second one was freely exposed to air moisture. Raman spectroscopy, nondestructive technique which is very sensitive to changes in structure of polymers, was used for the characterization of the protonation state of prepared polyaniline thin films. It was found that storage conditions affect the protonation state which in case of samples kept in desiccator is maintained without significant changes for longer time. Raman spectroscopy also revealed the dependence of protonation state on the oxidation time and 10 min proved as not sufficient for the creation of the protonation form of polyaniline.

Keywords: Raman spectroscopy; Polyaniline; Protonation state; Thin film; Conducting polymer

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-016-0078-3

Chemical Papers 71 (2) 379–385 (2017)