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B. Jędrzejewska, M. Kowalska

Synthesis and studies of novel homodimeric styrylbenzimidazolium dyes

applied as photoinitiators for the radical polymerization of acrylic monomers (in English)
Polimery 2015, No 4, 242


DOI: dx.doi.org/10.14314/polimery.2015.242

Summary
A series of homodimeric styrylbenzimidazolium dyes were synthesized and applied as visible light initiators for the polymerization of acrylic monomer. In the photoinitiating system, hemicyanine dye cation acts as an electron acceptor whereas borate anion is an electron donor. The photochemistry of the series of bichromophoric hemicyanine borates: 1,3-bis{2-[4-(N-alkylamino)styryl]-1-methylbenzimidazolium}propane, 1,5-bis{2-[4-(N-alkylamino)styryl]-1-methylbenzimidazolium}pentane, 1,10-bis{2-[4-(N-alkylamino)styryl]-1-methylbenzimidazolium}decane, was compared to the photochemistry of structurally related monochromophoric hemicyanine borates. The photoinitiating efficiency of the donor-acceptor pairs is discussed based on the free energy change for the photoinduced electron transfer from borate anion to dye cation.

Keywords: radical polymerization, photoinitiators, kinetics of polymerization, styrylbenzimidazolium dyes
e-mail: beata@utp.edu.pl
B. Jędrzejewska, M. Kowalska (954.3 KB)
Synthesis and studies of novel homodimeric styrylbenzimidazolium dyes applied as photoinitiators for the radical polymerization of acrylic monomers (in English)