Digitální knihovnaUPCE
 

20 (2014) Scientific papers, Series A

Permanentní URI k tomuto záznamuhttps://hdl.handle.net/10195/75412

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20142

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Autor: search.filters.author.Bureš, Filip

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  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Spectral, electrochemical and calculated properties of quadrupolar chromophores based on tetrafluorobenzene
    (University of Pardubice, 2014) Pippig, Falko; Mikysek, Tomáš; Ramaiyan, Manikannan; Pytela, Oldřich; Kulhánek, Jiří; Vytřas, Karel; Almonasy, Numan; Bureš, Filip
    Absorption/emission and electrochemical properties of four new quadrupolar push-pull-push molecules with central tetrafluorobenzene acceptor and two peripheral N,N-dihexylamino and O-hexyloxy donor groups were investigated. Experimental data were completed with quantum-chemical calculations. The extent of the intramolecular charge-transfer and nonlinear optical properties were elucidated in terms of structure-property relationships. The electronic nature of the appended donor group, length, planarity and composition of the B-linker (combination of 1,4-phenylene, 2,5-thienylene and acetylenic subunits) are the most important factors affecting the linear as well as nonlinear optical properties.
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Synthesis and characterization of push-pull molecules bearing tetrafluorobenzene central acceptor modified with two peripheral hexyloxy and dihexylamino donors
    (University of Pardubice, 2014) Ramaiyan, Manikannan; Kulhánek, Jiří; Bureš, Filip
    Starting from 1,4-diiodotetrafluorobenzene or 1,4-bis(5-bromothiophene-2- yl)tetra-fluorobenzene, four new push-pull molecules were synthesized via twofold cross-coupling reactions. Suzuki-Miyaura and Sonogashira reactions were employed to gain access to target molecules. The central tetrafluorobenzene acceptor unit was modified by two peripheral N,N-dihexylamino and Ohexyloxy groups with different donating ability to generate quadrupolar D-π-A- π-D system with tailored intramolecular charge-transfer. The length, planarity and composition of the π-linker between the acceptor and donors was modified by combination of 1,4-phenylene, 2,5-thienylene and acetylenic subunits in order to finely tune the linear as well as nonlinear optical properties.