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• W2799275461 abstract "A novel fluorescent molecular logic gate 1 is demonstrated as a two-input AND logic gate for the detection of acidity and oxidizability. Designed according to an electron-donor–spacer–fluorophore–spacer–receptor’ format, the modules are represented by ferrocene as the electron donor, 1,8-naphthalimide as the fluorophore and piperazine as the proton receptor. In the presence of elevated concentrations of H+ and Fe3+, the molecule switches ‘on’ emitting at λmax = 530 nm with Φf = 0.060 at 10−4 M H+ and 50 μM Fe3+. The H+ binding and apparent Fe3+ binding constants determined by fluorimetric titrations in 1:1 (v/v) methanol/water are log βH+ = 8.1 and log βFe3+ = 4.7. Modulation of the fluorescence output results from controlling competing photoinduced electron transfer (PET) at the ferrocene end and internal charge transfer (ICT) at the piperazine end. Time-resolved fluorescence spectroscopy reveals a single fluorescent lifetime of 5.8 ns, while from absorption transient spectroscopy a remarkable fast decay signal <2 ps is observed. Comparison is made with methylpiperazine 2 and piperazine fluorescent pH indicator 3 as model compounds." @default.
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• W2799275461 date "2018-10-01" @default.
• W2799275461 modified "2023-09-27" @default.
• W2799275461 title "A fluorescent AND logic gate based on a ferrocene-naphthalimide-piperazine format responsive to acidity and oxidizability" @default.
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• W2799275461 doi "https://doi.org/10.1016/j.dyepig.2018.04.060" @default.
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