Fluorimetric naphthalimide-based polymer logic beads responsive to acidity and oxidisability

Molecular logic gates were synthesised and surface immobilised onto TentaGel® MB-NH 2 (amino terminal functionalised polyethylene glycol ligands on polystyrene beads). Four naphthalimide-based tagged polymer solid beads are demonstrated expressing two-input H + , Fe 3+ -driven PASS 1, TRANSFER (H +...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019, Vol.7 (48), p.15225-15232
Main Authors: Refalo, Matthew Vella, Farrugia, Nicole V, Johnson, Alex D, Klejna, Sylwia, Szaci owski, Konrad, Magri, David C
Format: Article
Language:English
Subjects:
Beads
Boolean algebra
Charge transfer
Chemical synthesis
Electron transfer
Emission spectra
Fluorescence
Logic circuits
NMR
Nuclear magnetic resonance
Oxidizing agents
Polyethylene glycol
Polyethylene terephthalate
Polymers
Polystyrene resins
Spectrum analysis
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Summary:Molecular logic gates were synthesised and surface immobilised onto TentaGel® MB-NH 2 (amino terminal functionalised polyethylene glycol ligands on polystyrene beads). Four naphthalimide-based tagged polymer solid beads are demonstrated expressing two-input H + , Fe 3+ -driven PASS 1, TRANSFER (H + ) and AND Boolean logic functions. The photophysical properties of the model molecular compounds were studied by UV-visible absorption and fluorescence spectroscopy in 1 : 1 (v/v) methanol/water. TD-DFT calculations of the molecular Pourbaix sensors give insight into the mechanistic details of fluorescence modulation controlled by internal charge transfer (ICT) and photoinduced electron transfer (PET). Both colour and fluorescence emission can be used to distinguish the heterogeneous polymer beads. Stimulated by H + and/or an oxidant input(s) we demonstrate blue emitting two-input H + , Fe 3+ -driven PASS 1, and green emitting H + , Fe 3+ -driven two-input TRANSFER (H + ) and H + , Fe 3+ -driven two-input AND tagged solid beads. Naphthalimide tagged polymer beads demonstrate two-input H + , Fe 3+ -driven PASS 0, PASS 1, TRANSFER(H + ) and AND logic functions by a fluorescence output.
ISSN:2050-7526
2050-7534
DOI:10.1039/c9tc05545b