title: Enhanced and tunable photoluminescence of polyphenylenevinylenes confined in nanocomposite films.
abstract: Conformation of macromolecules and interchain interactions determine spectral properties of conjugated polymers (CP). An achievement of spatial confinement of isolated chains is one of the routes to use this feature of CP for their purposeful usage. In the present work, CP/O300 nanocomposites based on CP - poly(p-phenylenevinylene) and poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene) - and silica nanoparticles (O300) are prepared. In comparison with many previously known hybrid nanomaterials synthesized with the similar purpose, CP/O300 nanocomposites are characterized by the essentially enhanced and tunable photoluminescence. The greatest change of color coordinates is observed for poly(p-phenylenevinylene)-based nanocomposites due to specific preparation method and interaction with the inorganic component. The main emission from CP in the CP/O300 nanocomposites is owing to 0-0 transitions, while 0-1 transitions, associated with aggregate states of the CP chains, are suppressed.
authors: L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, prospekt Nauki 31, 03028 Kyiv, Ukraine.
authors: Oleg Yu
authors: OY
authors: Posudievsky
authors: L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, prospekt Nauki 31, 03028 Kyiv, Ukraine.
authors: Mykhailo S
authors: MS
authors: Papakin
authors: Center for Physical Sciences and Technology, Savanoriu 231, LT-02300 Vilnius, Lithuania.
authors: Oleksandr P
authors: OP
authors: Boiko
authors: L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, prospekt Nauki 31, 03028 Kyiv, Ukraine.
authors: Vyachesalv G
authors: VG
authors: Koshechko
authors: L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, prospekt Nauki 31, 03028 Kyiv, Ukraine.
authors: Vitaly D
authors: VD
authors: Pokhodenko
keywords: Conjugated polymers; Nanocomposite films; Silica nanoparticles; Spatial confinement; Tunable photoluminescence