[5]Helicene-Scaffold Fluorescence Sensing for Selective Detection of Au3+ Ions and Gold Nanoparticle

AUTOR(ES)

Sinthuprasert, Pichayanun; Petdum, Anuwut; Swanglap, Pattanawit; Panchan, Waraporn; Sooksimuang, Thanasat; Wanichacheva, Nantanit; Setthakarn, Krit

FONTE

J. Braz. Chem. Soc.

DATA DE PUBLICAÇÃO

2021-04

RESUMO

A new quenching fluorescence sensor (MDP) with high productivity was easily synthesized from a [5]helicene anhydride derivative and propargyl bromide. This MDP sensor has significant photophysical properties, including high fluorescence emission and a large Stokes shift, and it exhibits selectivity and an excellent detection response in distinguishing Au3+ ions from interfering metal ions in aqueous solution. The limit of detection of the sensor were determined to be 0.16 µmol L-1 or 32.0 ppb. Stoichiometric binding between the MDP and Au3+ ions was found to occur at a 1:2 ratio. Additionally, the MDP sensor shows an ability to detect gold ions in real water samples and recognize gold nanoparticles (AuNPs), which invites its further application in biological and environmental systems.

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