title: Enhancing the emissive properties of poly(p-phenylenevinylene)-conjugated polyelectrolyte-coated SiO2 nanoparticles.
abstract: Here we describe single-particle imaging studies conducted on the conjugated polyelecrolyte poly[5-methoxy-2-(3-sulfopropoxy)-1,4-phenylenevinylene] (MPS-PPV) supported on SiO(2) nanoparticles. The particles are subjected to a time-programmed sequence involving addition and removal of different additives, including excited-triplet-state quenchers and scavengers of singlet oxygen as well as ground-state oxygen. Our studies show that these additives enhance the emission intensity and photostability of the nanoparticles and may further repair photodamaged conjugated polymer. The ability to monitor the emission from individual particles along multiple cycles under a range of conditions provides a mechanistic insight into the action of these additives.
authors.affiliation: Department of Chemistry and Centre for Self-Assembled Chemical Structures (CSACS/CRMAA), McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada.
authors.forename: Hsiao-Wei
authors.initials: HW
authors.lastname: Liu
authors.forename: An Thien
authors.initials: AT
authors.lastname: Ngo
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Cosa
mesh_terms: D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010782:Photolysis; D011145:Polyvinyls / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry
chemical_list: C506109:Poly(2,5-methoxy-propyloxy sulfonate phenylene vinylene); D011145:Polyvinyls; C470024:poly(4-phenylenevinylene); D026082:Singlet Oxygen; D012822:Silicon Dioxide