1-(Bromoacetyl)pyrene, a novel photoinitiator for the copolymerization of styrene and methyl methacrylate was written by Mishra, Anuradha;Daswal, Swati. And the article was included in Radiation Physics and Chemistry in 2006.Formula: C18H11BrO The following contents are mentioned in the article:
The photopolymerization of styrene (Sty) with Me methacrylate (MMA) induced by pyrene (Py), 1-acetylpyrene (APy) and 1-(bromoacetyl)pyrene (BrPy) was studied. Py was completely ineffective while APy could just initiate the copolymerization in 15 h. Introduction of a Br in α-Me group of APy significantly enhanced the polymerization efficiencies. The kinetics and mechanism of bulk copolymerization of Sty with MMA (Sty-co-MMA) using BrPy as a sole photoinitiator was studied in detail. The kinetic data, inhibiting effect of benzoquinone and ESR studies suggest that the polymerization proceeds via a free radical mechanism. The system follows non-ideal kinetics (Rp α[BrPy]0·7[Sty]1[MMA]1·04) and degradative solvent transfer reasonably explains these kinetic non-idealities. The co-monomer reactivity ratios calculated by using the Finemann-Ross and Kelen-Tudos models were r1 (MMA)=0.48 and r2 (Sty)=0.52. The value of k2p/kt for the present system is 2.28 × 10-5 l/mol/s. IR and NMR anal. confirms the random structure of the copolymer. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Formula: C18H11BrO).
2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Formula: C18H11BrO
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary