Electrochemical OFF-ON ratiometric chemodosimeters for the selective and rapid detection of fluoride

Veerappan Mani, Wen Yung Li, Jiun An Gu, Chun Mao Lin, Sheng Tung Huang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have described two "OFF-ON electrochemical latent ratiometric redox chemodosimeters", 1,4-Bis(tert-butyldimethylsiloxy)benzene (H 2Q′) and 1,4-Bis (tert-butyldimet hylsiloxy)-2-methoxybenzene (MH2Q′) for the selective detection of inorganic fluoride. The electrochemical signals of hydroquinone (H2Q) and o-methoxy hydroquinone (MH2Q) within this latent redox probes (H 2Q′ and MH2Q′) were completely masked by protecting their hydroxyl group as silylether (OFF state). The externally added fluoride ions triggered the deprotection of H2Q′ and MH 2Q′ and unmasked the electrochemical properties of H 2Q and MH2Q respectively. The electrochemical reporters (H2Q and MH2Q) presented a pair of redox peaks at the electrode surface (ON state) and the peak currents are linearly dependent with the concentration of fluoride which leading to the ratiometric detection of fluoride. The limit of detection (signal-to-noise ratio=3) observed for the probes are 23.8 μM and 2.38 μM for H2Q′ and MH 2Q′ respectively. The deprotection is highly selective for fluoride over other anions investigated. The probes are highly stable and the proposed approach offers rapid response time and promising practical applicability. The proposed strategy holds great promise for the commencement of new H2Q based electrochemical probes by tuning the electrochemical behavior of H2Q.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalTalanta
Volume131
DOIs
Publication statusPublished - 2015

Fingerprint

Fluorides
Oxidation-Reduction
Surface states
Signal-To-Noise Ratio
Benzene
Electrochemical properties
Hydroxyl Radical
Reaction Time
Anions
Limit of Detection
Signal to noise ratio
Electrodes
Tuning
Ions
hydroquinone

Keywords

  • Chemodosimeters
  • Fluoride
  • Hydroquinone
  • Latent redox ratiometric probe
  • Selectivity
  • Sensor

ASJC Scopus subject areas

  • Chemistry(all)
  • Medicine(all)

Cite this

Electrochemical OFF-ON ratiometric chemodosimeters for the selective and rapid detection of fluoride. / Mani, Veerappan; Li, Wen Yung; Gu, Jiun An; Lin, Chun Mao; Huang, Sheng Tung.

In: Talanta, Vol. 131, 2015, p. 121-126.

Research output: Contribution to journalArticle

Mani, Veerappan ; Li, Wen Yung ; Gu, Jiun An ; Lin, Chun Mao ; Huang, Sheng Tung. / Electrochemical OFF-ON ratiometric chemodosimeters for the selective and rapid detection of fluoride. In: Talanta. 2015 ; Vol. 131. pp. 121-126.
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