2,4,6-trimethylbenzoyl diphenylphosphine oxide

Due to the significant importance of dienes as monomers, absolute as well as relative rate data have been determined for the addition of initiator derived radicals. Photolysis of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide (TMDPO) 5 leads to the formation of... 

Turro, George, and co-workers [70] have also observed and studied an acyl radical in solution by TRIR methods in their investigation of the photochemistry of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide (Scheme 2.4). More recently, Vasenkov and Frei [71, 72] reported the generation of the acetyl radical by photolysis of 1-naphthyl acetate (Scheme 2.5) or pinacolone (Scheme 2.2 R = Me, R = f-Bu) in zeolite NaY. Through the use of step-scan FTIR spectroscopy, they observed a carbonyl stretching mode at 2125 cm , interestingly... 

Scheme 10.2 Photofragmentations by a-cleavage of benzoin methyl ether and 2,4,6-trimethylbenzoyl diphenylphosphine oxide.

Chem. Descrip. 2,4,6-Trimethylbenzoyl diphenylphosphine oxide (50%) and 2-hydro) -2-methyl-1-phenyl-propan-1-one (50%)... 

A series of low molecular weight PS and PMMA polymers were produced by free-radical polymerization with a monoacylphosphine oxide,more specifically (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO), as a photoinitiator [65]. The MMD of the PS and PMMA samples was broad, with polydispersities of 1.81 and 2.81, respectively. SEC fractionation yielded improved MALDI spectra with respect to the unfractionated polymers. 

Additional improvements on the degree of conversion of the adhesive systems were observed with new and less hydrophobic initiators of polymerization. Camphorquinone and aromatic amines are the most commonly used photoinitiator systems for light-activated dental resins, but they can be excessively hydrophobic making it difficult to activate the more hydrophilic monomers at the adhesive systems. The addition of alternative initiators such as 1-phenyl-1,2-propanedione (PPD), 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (Lucerin-TPO) and bisacylphosphine oxide (BAPO) improve resin polymerization within hydrophilic domains and reduce susceptibility to inactivation by... 

Trimethylbenzoyl-diphenylphosphine oxide 2-Hydroxy-2-methyl-1 -phenylpropan-1 -one cA 351 Acrylate-based... 

Photopolymerization carried out above 365 nm using (2,4,6-trimethylbenzoyl) diphenylphosphine oxide as photoinitiator in the presence of CH2CI2 (interference filter cupric sulfate aqueous solution). 

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