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Photoinduced Polymerization of Thiophene Using Iodonium Salt
Author(s) -
Yagci Yusuf,
Yilmaz Faruk,
Kiralp Senem,
Toppare Levent
Publication year - 2005
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200500084
Subject(s) - hexafluorophosphate , thiophene , polymerization , photoinitiator , polymer chemistry , chemistry , photopolymer , photochemistry , cationic polymerization , polymer , organic chemistry , monomer , ionic liquid , catalysis
Summary: Thiophene was polymerized by means of UV irradiation using diphenyliodonium hexafluorophosphate as a photoinitiator. An initiation mechanism involving electron transfer from photochemically generated onium radical cations to thiophene was proposed. N ‐Ethoxy‐2‐methylpyridinium hexafluorophosphate and triphenylsulfonium hexafluorophosphate were also found to be effective in facilitating the polymerization of thiophene. Polymerization is accompanied with the film formation on the surface of the reaction tube. The photochemically obtained polymers were characterized by FT‐IR, DSC, and SEM analyses and compared with those obtained by oxidative and electrochemical means. Electrical conductivities of the samples were measured by four‐probe technique.Photograph of the polymerization mixture containing thiophene and iodonium salt in CH 2 Cl 2 before (a), after 5 min of irradiation (b), and dried film (c).