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Hybrid Systems Based on Layered Silicate and Organic Dyes for Cascade Energy Transfer
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SYSNO ASEP 0448031 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hybrid Systems Based on Layered Silicate and Organic Dyes for Cascade Energy Transfer Author(s) Belušáková, S. (SK)
Lang, Kamil (UACH-T) SAI, RID, ORCID
Bujdák, J. (SK)Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 119, č. 38 (2015), s. 21784-21794Number of pages 11 s. Language eng - English Country US - United States Keywords Cascade energy transfers ; Multicomponent films ; Resonance energy transfer ; Spectral properties ; Steady state fluorescence ; Time-resolved fluorescence spectroscopy Subject RIV CA - Inorganic Chemistry Institutional support UACH-T - RVO:61388980 UT WOS 000361921600004 EID SCOPUS 84942345969 DOI 10.1021/acs.jpcc.5b04982 Annotation This work describes the multistep Förster resonance energy transfer (FRET) among laser dyes adsorbed onto the nanoparticles of a layered silicate, saponite (Sap). Six cationic laser dyes with appropriate spectral properties to fit the resonance conditions were selected. Fluorescence spectroscopy proved cascade FRET in the experiments based on hybrid colloidal systems. The emission from preferentially excited energy donor molecules was reduced in favor of the emission from energy acceptors. The colloidal systems were used for the preparation of thin solid films with embedded dye cations. The films were characterized by X-ray diffraction, absorption spectroscopy, and linearly polarized absorption spectroscopy. Results from steady-state fluorescence, fluorescence anisotropy measurements, and time-resolved fluorescence spectroscopy confirmed the occurrence of a cascade FRET in the films. The effect of the concentration of embedded dye molecules on FRET efficiency was proved. The multicomponent films based on Sap and laser dyes are affordable materials useful for the manipulation of light energy at a molecular level, thus mimicking a cascade process occurring in photosynthesis systems in green plants. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2016
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