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Titel: Embedding Photoacids into Polymer Opal Structures: Synergistic Effects on Optical and Stimuli-Responsive Features
VerfasserIn: Bitsch, Martin
Boehm, Anna Katharina
Grandjean, Alexander
Jung, Gregor
Gallei, Markus
Sprache: Englisch
Titel: Molecules
Bandnummer: 26
Heft: 23
Verlag/Plattform: MDPI
Erscheinungsjahr: 2021
Freie Schlagwörter: opal film
melt-shear organization
photoacid
excited-state proton transfer
fluorescence
polymer particle synthesis
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Opal films with their vivid structural colors represent a field of tremendous interest and obtained materials offer the possibility for many applications, such as optical sensors or anti counterfeiting materials. A convenient method for the generation of opal structures relies on the tailored design of core-interlayer-shell (CIS) particles. Within the present study, elastomeric opal films were combined with stimuli-responsive photoacids to further influence the optical properties of structurally colored materials. Starting from cross-linked polystyrene (PS) core particles featuring a hydroxy-rich and polar soft shell, opal films were prepared by application of the melt-shear organization technique. The photoacid tris(2,2,2-trifluoroethyl) 8-hydroxypyrene-1,3,6-trisulfonate (TFEHTS) could be conveniently incorporated during freeze-drying the particle dispersion and prior to the melt-shear organization. Furthermore, the polar opal matrix featuring hydroxylic moieties enabled excited-state proton transfer (ESPT), which is proved by spectroscopic evaluation. Finally, the influence of the photoacid on the optical properties of the 3-dimensional colloidal crystals were investigated within different experimental conditions. The angle dependence of the emission spectra unambiguously shows the selective suppression of the photoacid’s fluorescence in its deprotonated state.
DOI der Erstveröffentlichung: 10.3390/molecules26237350
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-351101
hdl:20.500.11880/32144
http://dx.doi.org/10.22028/D291-35110
ISSN: 1420-3049
Datum des Eintrags: 6-Jan-2022
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Markus Gallei
NT - Prof. Dr. Gregor Jung
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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