Visible Light-Mediated Atom Transfer Radical Addition via Oxidative and Reductive Quenching of Photocatalysts
作者:Carl-Johan Wallentin、John D. Nguyen、Peter Finkbeiner、Corey R. J. Stephenson
DOI:10.1021/ja300798k
日期:2012.5.30
visible light-mediated atom transfer radical addition (ATRA) of haloalkanes onto alkenes and alkynes using the reductive and oxidativequenching of [IrdF(CF(3))ppy}(2)(dtbbpy)]PF(6) and [Ru(bpy)(3)]Cl(2) is presented. Initial investigations indicated that the oxidativequenching of photocatalysts could effectively be utilized for ATRA, and since that report, the protocol has been expanded by broadening
Metal-free and light-promoted radical iodotrifluoromethylation of alkenes with Togni reagent as the source of CF<sub>3</sub> and iodine
作者:Redouane Beniazza、Maxime Douarre、Dominique Lastécouères、Jean-Marc Vincent
DOI:10.1039/c7cc00214a
日期:——
Iodotrifluoromethylation of alkenes is effectively conducted by combining benzophenone, “black light”, isopropanol and Togni reagent 1 as the source of both the CF3 group and iodine atom.
visible light have undergone a renaissance in recent years. Polypyridyl dyes such as Ir(ppy)3 and Ru(bpy)3 are key catalysts in this event, and blue‐ or white‐lightirradiation is required for the chemical transformations. However, it remains a challenge to achieve reactions under the lower energy of redlight. We disclose, herein, that trifluoroethoxy‐coatedsubphthalocyanine realizes the red‐light‐driven
Coreactant Strategy for the Photoredox Catalytic Generation of Trifluoromethyl Radicals under Low-Energy Photoirradiation
作者:Sinheui Kim、Gyurim Park、Eun Jin Cho、Youngmin You
DOI:10.1021/acs.joc.6b00966
日期:2016.8.19
to make use of low-energy photons in photoinduced radical processes. We have demonstrated that the use of oxalate as a coreactant provides a useful principle for the photocatalytic production of trifluoromethylradicals (•CF3) from CF3I upon green or red LED photoirradiation of narrow-bandgap photocatalysts. The photocatalytic cycle involves a radical anion of carbon dioxide (CO2•–) as a reductant for
The invention provides polymers, methods of preparing polymers, and compositions that include polymers, wherein said polymers include a plurality of two-carbon repeating units in a polymer chain, wherein one or more of the two-carbon repeating units of the polymer chain have tertiary amine or pyridine-containing substituents; and at least about 10% of the nitrogen atoms of the tertiary amine or pyridine-containing substituents are quaternized with alkyl groups or with an alkyl group that contains one or more ethylene glycol groups. The alkyl or ethoxylated alkyl groups can also be at least partially fluorinated. The polymers can be used to provide antimicrobial surfaces and antifouling coatings.