Silver(I) ion selective ionophores containing dithiocarbamoyl moieties on steroid backbone

Tweezer-type and non-tweezer-type ionophores containing dithiocarbamoyl groups on a 7-deoxycholic amide or cholane derivatives were designed and synthesized. Potentiometric evaluation of the poly(vinyl chloride) (PVC) membranes containing those deoxycholic amides/cholanes linked with tweezer-type di...

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Bibliographic Details
Published in:Talanta (Oxford) 2005-04, Vol.66 (3), p.794-804
Main Authors: Kim, Byeong Hyo, Hong, Hun Pyo, Cho, Kui Tae, On, Jeung Hoon, Jun, Young Moo, Jeong, In Seok, Cha, Geun Sig, Nam, Hakhyun
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Deoxycholic amides/cholanes
Electrochemical methods
Exact sciences and technology
General, instrumentation
Ionophores
Sensor
Silver(I)
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Summary:Tweezer-type and non-tweezer-type ionophores containing dithiocarbamoyl groups on a 7-deoxycholic amide or cholane derivatives were designed and synthesized. Potentiometric evaluation of the poly(vinyl chloride) (PVC) membranes containing those deoxycholic amides/cholanes linked with tweezer-type dithiocarbamoyl moieties showed excellent affinity and selectivity to silver(I) ion over alkali, alkaline earth and other transition metal cations. On the other hand, deoxycholic amides/cholanes substituted with one dithiocarbamoyl group, i.e., non-tweezer-type ionophores, resulted in relatively poor potentiometric sensitivity and detection limits. The enhanced potentiometric properties of newly synthesized tweezer-type dithiocarbamoyl containing ionophores have been further improved by employing silver ion complexing reagent in the internal reference solution, which resulted in greatly reduced detection limit (∼100 ppt) for the electrodes based on them.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2004.12.033