Karasu, Feyza published the artcileMechanistic Studies of Photoinitiated Free Radical Polymerization Using a Bifunctional Thioxanthone Acetic Acid Derivative as Photoinitiator, HPLC of Formula: 5411-14-3, the publication is Macromolecules (Washington, DC, United States) (2009), 42(19), 7318-7323, database is CAplus.
A bifunctional photoinitiator for free radical polymerization, thioxanthone catechol-O,O’-diacetic acid, was synthesized, characterized, and compared to photoinitiator parameters of the monofunctional analog, 2-(carboxymethoxy)thioxanthone. Photophys. studies such as fluorescence, phosphorescence, and laser flash photolysis in addition to photopolymerizations of Me methacrylate show that the bifunctional photoinitiator is more efficient in polymer generation than the monofunctional derivative These studies suggest that initiator radicals are generated from a Ï-Ï* triplet state in an intramol. electron transfer, followed by proton transfer and decarboxylation to generate alkyl radicals, which initiate polymerization The initial electron transfer is faster for the bifunctional photoinitiator than the monofunctional derivative, which is based on laser flash photolysis studies. Because of the relatively fast intramol. radical generation from the triplet state (triplet lifetime = 490 ns), quenching by mol. oxygen is insignificant and polymerization of Me methacrylate proceeds efficiently without deoxygenation. At higher concentrations of initiator (â? mM) intermol. electron transfer competes with intramol. electron transfer. Both processes, inter- and intramol. processes, yield initiating alkyl radicals.
Macromolecules (Washington, DC, United States) published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, HPLC of Formula: 5411-14-3.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia