𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A Lipophilic Derivative of Vitamin B12 as Selective Carrier for Anions

✍ Scribed by Peter Schulthess; Daniel Ammann; Wilhelm Simon; Christian Caderas; René Stepánek; Bernhard Kräutler

Publisher
John Wiley and Sons
Year
1984
Tongue
German
Weight
445 KB
Volume
67
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Incorporation of the lipophilic Co(III)‐cobyrinate octadecyl‐cobester 1 and of its ionic aqua‐cyano perchlorate derivative 2 into poly(vinyl chloride)/bis(1‐butylpentyl) adipate liquid membranes induces a selectivity, measured potentiometrically, of about 10^3^ for SCN^−^ an NO with respect to CI^−^, but only of about 4 for ClO vs. CI^−^. This is in contrast to classical anion‐exchanger membranes, which exhibit a selectivity sequence ClO > SCN^−^ ≫ NO > Cl^−^ in accordance with the Hofmeister, series. The Co(III)‐corrins 1 and 2, when components in solvent polymeric membranes, undergo exchange of axial ligands an behave as highly selective carriers fof SCN^−^ and NO.

📜 SIMILAR VOLUMES

Lipophilicity of tetraphenylborate deriv
Lipophilicity of tetraphenylborate derivatives as anionic sites in neutral carrier-based solvent polymeric membranes and lifetime of corresponding ion-selective electrochemical and optical sensors
✍ Eric Bakker; Ernö Pretsch 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 985 KB

The leaching process of lipophilic anionic additives (e.g., tetraphenylborates) from neutral carrier based membranes into an aqueous sample is quantified. While the necessary lipophilicity (i.e., equilibrium partition coefficient) of the additive for a certain lifetime of the sensor is identical to