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Carbazole‐bound ferrocenium salt as an efficient cationic photoinitiator for epoxy polymerization
Author(s) -
Wang Tao,
Li Bao Sh,
Zhang Li X
Publication year - 2005
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1837
Subject(s) - hexafluorophosphate , cationic polymerization , photoinitiator , carbazole , photochemistry , chemistry , polymerization , cyclopentadienyl complex , photopolymer , polymer chemistry , materials science , monomer , organic chemistry , catalysis , ionic liquid , polymer
The low absorption of cyclopentadienyl‐Fe‐cumene hexafluorophosphate (I‐261) above 300 nm limits its utilization of longer wavelength emission from light sources. We report here the synthesis and photoactivity of a carbazole‐bound ferrocenium salt, cyclopentadienyl‐Fe‐carbazole hexafluorophosphate ([Cp‐Fe‐carbazole] + PF 6 − ), which efficiently absorbs radiation between 300 and 400 nm. Its photoactivity is higher than that of I‐261 as a cationic photoinitiator. When the photosensitizer benzoyl peroxide (BPO) is employed, [Cp‐Fe‐carbazole] + PF 6 − can obviously be sensitized. Two other ferrocenium salts with amine groups, cyclopentadienyl‐Fe‐aniline hexafluorophosphate ([Cp‐Fe‐aniline] + PF 6 − ) and cyclopentadienyl‐Fe‐ p ‐methylaniline hexafluorophosphate ([Cp‐Fe‐ p ‐methylaniline] + PF 6 − ) were also studied. As photoinitiators, they perform poorly and can not be sensitized by BPO. Copyright © 2005 Society of Chemical Industry