Wavelength-resolved PhotoATRP

• Verfasst von: Nardi, Martina [VerfasserIn]
• Verfasst von: Blasco, Eva [VerfasserIn]
• Verfasst von: Barner-Kowollik, Christopher [VerfasserIn]
• Titel: Wavelength-resolved PhotoATRP
• Verf.angabe: Martina Nardi, Eva Blasco and Christopher Barner-Kowollik
• E-Jahr: 2022
• Jahr: January 10, 2022
• Umfang: 5 S.
• Fussnoten: Gesehen am 03.05.2022
• Titel Quelle: Enthalten in: American Chemical SocietyJournal of the American Chemical Society
• Ort Quelle: Washington, DC : ACS Publications, 1879
• Jahr Quelle: 2022
• Band/Heft Quelle: 144(2022), 3, Seite 1094-1098
• ISSN Quelle: 1520-5126
• DOI: doi:10.1021/jacs.1c11259
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1800713428

Abstract

The careful mapping of photoinduced reversible-deactivation radical polymerizations (RDRP) is a prerequisite for their applications in soft matter materials design. Here, we probe the wavelength-dependent behavior of photochemically induced atom transfer radical polymerization (ATRP) using nanosecond pulsed-laser polymerization (PLP). The photochemical reactivities at identical photon fluxes of methyl acrylate in terms of conversion, number-average molecular weight, and dispersity of the resulting polymers are mapped against the absorption spectrum of the copper(II) catalyst in the range of 305-550 nm. We observe a red shift of the action spectrum relative to the absorption spectrum of the copper(II) catalyst. Both the number-average molecular weight and the dispersity show a wavelength dependence, while the molecular weight and conversion remain linearly correlated. The reported data allow the judicious selection of optimum wavelengths for photoATRP.