SPITERI, Jake; JOHNSON, Alex; DENISOV, Sergey; JONUSAUSKAS, Gediminas; MCCLENAGHAN, Nathan; MAGRI, David

doi:10.1016/j.dyepig.2018.04.060

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

http://creativecommons.org/licenses/by-nc-sa/

SPITERI, Jake
Department of Chemistry [Msida]

JOHNSON, Alex
Department of Chemistry [Msida]

DENISOV, Sergey
Institut des Sciences Moléculaires [ISM]

Idioma

Article de revue

Este ítem está publicado en

Dyes and Pigments. 2018, vol. 157, p. 278-283

Elsevier

Resumen en inglés

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 piper-azine as the proton receptor. In the presence of elevated concentrations of H + and Fe 3+ , the molecule switches 'on' emitting at λ max = 530 nm with Φ f = 0.060 at 10 −4 M H + and 50 μM Fe 3+. The H + binding and apparent Fe 3+ binding constants determined by fluorimetric titrations in 1:1 (v/v) methanol/water are log β H+ = 8.1 and log β Fe3+ = 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 spec-troscopy a remarkable fast decay signal < 2 ps is observed. Comparison is made with methylpiperazine 2 and piperazine fluorescent pH indicator 3 as model compounds.< Leer menos

Palabras clave en inglés

Naphthalimide

Ferrocene

Photoinduced electron transfer

Pourbaix sensor

Molecular logic gate

Fluorescence

Metadatos

Licencia de uso del documento

A fluorescent AND logic gate based on a ferrocene-naphthalimide-piperazine format responsive to acidity and oxidizability

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en inglés

DOI

Orígen

Centros de investigación