Continuous Wave and Time-Resolved Electron Paramagnetic Resonance Study of Photoinduced Radicals in Fluoroacrylic Porous Polymer Films was written by Sheveleva, A. M.;Ivanov, M. Yu.;Shundrina, I. K.;Bukhtoyarova, A. D.;Bagryanskaya, E. G.;Fedin, M. V.. And the article was included in Journal of Physical Chemistry C in 2016.Recommanded Product: 3063-94-3 The following contents are mentioned in the article:
The authors have combined continuous wave (CW) and time-resolved (TR) ESR to study UV photodegradation of thin porous films of a few representative fluoroacrylic polymers. Different types of spectra were detected using CW and TR EPR and assigned to the species formed on the inner surface of the pores and in the bulk of the polymer, resp. The radical pairs formed in the bulk are short-lived, as is evidenced by TR EPR, and most likely recombine back to the initial polymer. On the contrary, the radicals formed on the surface of the pores are metastable in the absence of oxygen; they can be studied by CW EPR and clearly assigned to the radicals of type ·C(CH3)CH2– (so-called propagating radicals) formed via the cleavage of the C-C bond of the ester side chains and consecutive β-scission. Remarkably, their CW EPR spectra closely resemble solution-state spectra, indicating that these radicals are localized in the pores where the mobility of Me and methylene protons is not suppressed. UV photodegradation of porous fluoroacrylic polymer films mainly occurs on the inner surface of the pores, which needs to be considered in future development of this type PSPs. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Recommanded Product: 3063-94-3).
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Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics