Synthesis of photoactive polymer colloids by polymerization in aqueous dispersed media to product singlet oxygen
Résumé
APME 2019: The 13thInternational Conference on Advanced Polymers via Macromolecular Engineering, 15-18April 2019, Stellenbosch, SASYNTHESIS OF PHOTOACTIVE POLYMER COLLOIDS BY POLYMERIZATION IN AQUEOUS DISPERSEDMEDIA TO PRODUCE SINGLET OXYGENCharlène Boussiron, Luca Petrizza, Mickaël Le Bechec, Sylvie Lacombe, Maud Save*CNRS/ Univ Pau & Pays Adour/ E2S UPPA, IPREM, Institut des Sciences Analytiqueset de Physicochimie pour l'Environnement et les Matériaux (IPREM), UMR5254, 64000, Pau, France.* email: maud.save@univ-pau.frABSTRACTThe design of photoactive polymer substrates producing singlet oxygen under visible light irradiation has great technological potential. Production of singlet oxygen (1O2), a selective reactive oxygen species (ROS) produced by irradiation under visible light of organic photosensitizers, has attracted increasing interest in the fields of fine chemistry,1photo-decontamination of air/water,2antimicrobial materials,3or Photodynamic Therapy (PDT).4Immobilization of photosensitizers on solid substrates improves their handling, recyclability, stability and facilitates purification steps to remove photocatalyst from reactants in fine chemistry. In that context, functional waterborne latex synthesized by the scalable emulsion polymerization process, are versatile to prepare photosensitizer-supported materials either as stable colloidal particles or as polymer film. We will present two strategies to design photosensitizer-grafted polymer colloids. First, film forming latex particle with a decorated shell will be synthesized by polymerization-induced self-assembly (PISA, Fig. 1 left).5Secondly, crosslinked particles will be synthesized by miniemulsion copolymerization to produce core-functionalized particles(PISA, Fig. 1 right). The organic photosensitizer chosen to synthesize the functional monomer is the Rose Bengal molecule.