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Dyes based on the 6,7‐dichloro‐5,8‐quinolinedione skeleton as new type II photoinitiators for radical polymerisation
Author(s) -
Orzeł Agnieszka,
Podsiadły Radosław,
Podemska Karolina,
Strzelczyk Rafał,
Kolińska Jolanta,
Sokołowska Jolanta
Publication year - 2014
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12083
Subject(s) - chemistry , photochemistry , polymerization , tmpta , mass spectrometry , electrochemistry , polymer chemistry , organic chemistry , photoinitiator , polymer , monomer , electrode , chromatography
Several dyes based on the 6,7‐dichloro‐5,8‐quinolinedione skeleton have been synthesised and characterised by proton nuclear magnetic resonance spectroscopy and electron ionisation mass spectrometry. The spectroscopic and electrochemical properties of these dyes were investigated. Photoredox pairs consisting of the synthesised dyes and commercially available hydrogen donors (2‐mercaptobenzoxazole, 2‐mercaptobenzothiazole, 2‐mercaptobenzimidazole, and 2,5‐dimercapto‐1,3,4‐thiadiazole) were tested for use as effective initiator systems for radical polymerisation of trimethylolpropane triacrylate with visible light. The efficiencies of these initiator systems are discussed in terms of the free energy change for the electron transfer process from the dye to the hydrogen donor.