SPITERI, Jake; DENISOV, Sergey; JONUSAUSKAS, Gediminas; KLEJNA, Sylwia; SZACIŁOWSKI, Konrad; MCCLENAGHAN, Nathan; MAGRI, David

doi:10.1039/c8ob00485d

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SPITERI, Jake
Department of Chemistry [Msida]

DENISOV, Sergey
Institut des Sciences Moléculaires [ISM]

JONUSAUSKAS, Gediminas
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Ce document a été publié dans

Organic & Biomolecular Chemistry. 2018, vol. 16, n° 34, p. 6195-6201

Royal Society of Chemistry

Résumé en anglais

Two types of fluorescent logic gates are accessed from two different arrangements of the same modular components, one as an AND logic gate (1) and the other as a PASS 0 logic gate (2). The logic gates were designed with an 'electron-donor-spacer 1-fluorophore-spacer 2-receptor' format and demonstrated in 1 : 1 (v/v) methanol/water. The molecules consist of ferrocene as the electron donor, 4-aminonaphthali-mide as the fluorophore and a tertiary alkylamine as the receptor. In the presence of high H + and Fe 3+ levels, regioisomers 1a and 1b switch 'on' as AND logic gates with fluorescence enhancement ratios of 16-fold and 10-fold, respectively, while regioisomers 2a and 2b are functionally dormant, exhibiting no fluorescence switching. The PASS 0 logic of 2a and 2b results from the transfer of an electron from the excited state fluorophore to the ferrocenium unit under oxidising conditions as predicted by DFT calculations. Time-resolved fluorescence spectroscopy provided lifetimes of 8.3 ns and 8.1 ns for 1a and 1b, respectively. The transient signal recovery rate of 1b is ∼10 ps while that of 2b is considerably longer on the nanosecond timescale. The divergent logic attributes of 1 and 2 highlight the importance of field effects and opens up a new approach for regulating logic-based molecules.< Réduire

DOI

http://dx.doi.org/10.1039/c8ob00485d

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Reservoir Computing with Real-time Data for future IT

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Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798