Ionophores based on 1,3-dithiole-2-thione-4,5-dithiolate (DMIT) as potentiometric silver sensors

Martin R. Bryce, Brian Johnston, Ritu Kataky, K. Tóth

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A range of acyclic compounds based on 1,3-dithiole-2-thione-4,5-dithiolate (DMIT), functionalised with a silver binding chain and an alkyl chain, were synthesised and assessed as silver ionophores suitable for incorporation into potentiometric ion-selective electrodes as sensors for silver ions in photographic emulsions. The new ionophores were compared with a commercially available ionophore and a 14-crown-4-based ionophore. The membrane compositions were optimised for silver ion selectivity over a range of ions of relevance in the photographic process. 4-(Butylsulfanyl)-5-(phenylmethylthioethylsulfanyl)-1,3-dithiole-2-one was shown to be the most suitable ionophore in plasticised membrane electrodes, with a Nernstian response in the range 10-1-10-6 mol dm-3 and selectivity coefficients of the order of log K(POT)(Ag/M) ≤ -4.0.

Original languageEnglish
Pages (from-to)861-866
Number of pages6
JournalThe Analyst
Volume125
Issue number5
DOIs
Publication statusPublished - 2000

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Ionophores
Silver
silver
sensor
ion
Sensors
Ions
electrode
membrane
Photographic emulsions
Membranes
Ion-Selective Electrodes
emulsion
Emulsions
Electrodes
1,3-dithiole-2-thione-4,5-dithiolate
Chemical analysis

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Ionophores based on 1,3-dithiole-2-thione-4,5-dithiolate (DMIT) as potentiometric silver sensors. / Bryce, Martin R.; Johnston, Brian; Kataky, Ritu; Tóth, K.

In: The Analyst, Vol. 125, No. 5, 2000, p. 861-866.

Research output: Contribution to journalArticle

Bryce, Martin R. ; Johnston, Brian ; Kataky, Ritu ; Tóth, K. / Ionophores based on 1,3-dithiole-2-thione-4,5-dithiolate (DMIT) as potentiometric silver sensors. In: The Analyst. 2000 ; Vol. 125, No. 5. pp. 861-866.
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