Tailoring Photoluminescence Properties in Ionic Nanoparticle Networks

Autor(en)

Martin Kronstein, Johanna Akbarzadeh, Christina Drechsel, Herwig Peterlik, Marie-Alexandra Neouze

Abstrakt

To investigate the original and promising luminescence properties of ionic nanoparticle networks (INN), various material compositions were investigated. In this work, the linker used to network the silica nanoparticles was varied; numerous substituted or non-substituted imidazolium, pyrazolium and pyridinium linkers are presented. Photoluminescence experiments on the INN hybrid materials revealed strong emission bands over a broad range in the visible region of the light spectrum. Varying the aromatic linker between the imidazolium units induced clear shifts of the emission maxima up to 100 nm, as a consequence of π–π stacking interactions. Steric hindrance and inductive effects of the substituents, introduced on the aromatic units, also strongly influenced the luminescence properties of the materials by modifying the π–π stacking between the imidazolium rings. Small and wide-angle X-ray scattering (SAXS, WAXS) experiments revealed a clear trend between the obtained structural parameters (short-range order parameter and distance of the aromatic units within the hybrid material) and the luminescence quantum yields of the INN materials.

Organisation(en)

Dynamik Kondensierter Systeme

Externe Organisation(en)

Technische Universität Wien, École Polytechnique

Journal

Chemistry: A European Journal

Band

20

Seiten

10763-10774

Anzahl der Seiten

12

ISSN

0947-6539

DOI

https://doi.org/10.1002/chem.201400392

Publikationsdatum

08-2014

Peer-reviewed

Ja

ÖFOS 2012

104003 Anorganische Chemie, 103015 Kondensierte Materie

Schlagwörter

ASJC Scopus Sachgebiete

Catalysis, Organic Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ddc8309d-9847-48f7-8de4-45faf53221d7