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Emission spectroscopic analysis of poly(3‐octyl thiophene) exposed to plasmas
Author(s) -
RodríguezLazcano Y.,
Martínez H.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26509
Subject(s) - plasma , thiophene , helium , hydrogen , analytical chemistry (journal) , nitrogen , polymer , emission spectrum , materials science , chemistry , spectral line , organic chemistry , physics , quantum mechanics , astronomy , composite material
Abstract Emission spectroscopy was employed to study reaction process of poly(3‐octyl thiophene) (P3OT) exposed to helium, nitrogen, air and hydrogen plasmas. The plasma was generated by an AC discharge at a pressure of 2 × 10 −2 Pa. The discharge power was maintained at an output of 220 V and a current of 0.2 A. The light emitted was monitored in the case of each plasma. Measurements at various discharge times were made of several emission peaks. The dominant emission bands were assigned to CH 2 at 589.32 nm, S 2 (B 3 Σ u − –X 3 Σ g − ) at 413.35 nm, CH + (A 1 Π–X 1 Σ) at 422.51 nm and C 3 H 3 at 344.02 nm. These dominant emission bands indicate that the poly(3‐octyl thiophene) was decomposed by plasma interaction. Nevertheless, the reaction between the polymer and nitrogen, hydrogen and air plasmas is more intense than that in the helium plasma. The possible reaction channels and formation mechanisms of some species produced are discussed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007