Influence of anionic additive on Hg2+ interference on Ag+-ISEs based on [2.2.2]p,p,p-cyclophane as neutral carrier

Johan Bobacka; V Vaananen; Andrzej Lewenstam; Ari Ivaska

doi:10.1016/j.talanta.2003.12.012

Influence of anionic additive on Hg2+ interference on Ag+-ISEs based on [2.2.2]p,p,p-cyclophane as neutral carrier

Johan Bobacka, V Vaananen, Andrzej Lewenstam, Ari Ivaska

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

23 Citations (Scopus)

Abstract

The influence of the anionic additive on the Hg2+ interference on Ag+-ion-selective electrodes (Ag+-ISEs) based on [2.2.2]p,p,p-cyclophane as pi-coordinating neutral carrier was studied by potentiometric measurements. The weakly coordinating carborane anion (7,8,9,10,11,12-hexabromocarborane, CB11H6Br6-) was compared with the commonly used tetrakis(4-chlorophenyl borate) (TpClPB(-)) as the anionic additive in plasticized PVC membrane-based Ag+-ISEs. The Hg2+ interference was reduced by six orders of magnitude when replacing TpClPB(-) with CB11H6Br6- as the anionic additive, resulting in log K-Ag,K-Hg = -3.8 +/- 0.1 determined by the matched potential method (MPM). This indicates that weakly coordinating carboranes may be particularly useful as anionic additives in ISEs for soft cations. (C) 2003 Elsevier B.V. All rights reserved.

Original language	Undefined/Unknown
Pages (from-to)	135–138
Number of pages	4
Journal	Talanta
Volume	63
Issue number	1
DOIs	https://doi.org/10.1016/j.talanta.2003.12.012
Publication status	Published - 2004
MoE publication type	A1 Journal article-refereed

Keywords

anionic additive
carborane
pi-coordination
cyclophane

Access to Document

10.1016/j.talanta.2003.12.012

Cite this

@article{3a1b4b83a82a46e096be4fe15431955f,

title = "Influence of anionic additive on Hg2+ interference on Ag+-ISEs based on [2.2.2]p,p,p-cyclophane as neutral carrier",

abstract = "The influence of the anionic additive on the Hg2+ interference on Ag+-ion-selective electrodes (Ag+-ISEs) based on [2.2.2]p,p,p-cyclophane as pi-coordinating neutral carrier was studied by potentiometric measurements. The weakly coordinating carborane anion (7,8,9,10,11,12-hexabromocarborane, CB11H6Br6-) was compared with the commonly used tetrakis(4-chlorophenyl borate) (TpClPB(-)) as the anionic additive in plasticized PVC membrane-based Ag+-ISEs. The Hg2+ interference was reduced by six orders of magnitude when replacing TpClPB(-) with CB11H6Br6- as the anionic additive, resulting in log K-Ag,K-Hg = -3.8 +/- 0.1 determined by the matched potential method (MPM). This indicates that weakly coordinating carboranes may be particularly useful as anionic additives in ISEs for soft cations. (C) 2003 Elsevier B.V. All rights reserved.",

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AU - Bobacka, Johan

AU - Vaananen, V

AU - Lewenstam, Andrzej

AU - Ivaska, Ari

PY - 2004

Y1 - 2004

N2 - The influence of the anionic additive on the Hg2+ interference on Ag+-ion-selective electrodes (Ag+-ISEs) based on [2.2.2]p,p,p-cyclophane as pi-coordinating neutral carrier was studied by potentiometric measurements. The weakly coordinating carborane anion (7,8,9,10,11,12-hexabromocarborane, CB11H6Br6-) was compared with the commonly used tetrakis(4-chlorophenyl borate) (TpClPB(-)) as the anionic additive in plasticized PVC membrane-based Ag+-ISEs. The Hg2+ interference was reduced by six orders of magnitude when replacing TpClPB(-) with CB11H6Br6- as the anionic additive, resulting in log K-Ag,K-Hg = -3.8 +/- 0.1 determined by the matched potential method (MPM). This indicates that weakly coordinating carboranes may be particularly useful as anionic additives in ISEs for soft cations. (C) 2003 Elsevier B.V. All rights reserved.

AB - The influence of the anionic additive on the Hg2+ interference on Ag+-ion-selective electrodes (Ag+-ISEs) based on [2.2.2]p,p,p-cyclophane as pi-coordinating neutral carrier was studied by potentiometric measurements. The weakly coordinating carborane anion (7,8,9,10,11,12-hexabromocarborane, CB11H6Br6-) was compared with the commonly used tetrakis(4-chlorophenyl borate) (TpClPB(-)) as the anionic additive in plasticized PVC membrane-based Ag+-ISEs. The Hg2+ interference was reduced by six orders of magnitude when replacing TpClPB(-) with CB11H6Br6- as the anionic additive, resulting in log K-Ag,K-Hg = -3.8 +/- 0.1 determined by the matched potential method (MPM). This indicates that weakly coordinating carboranes may be particularly useful as anionic additives in ISEs for soft cations. (C) 2003 Elsevier B.V. All rights reserved.

KW - anionic additive

KW - carborane

KW - pi-coordination

KW - cyclophane

KW - anionic additive

KW - carborane

KW - pi-coordination

KW - cyclophane

KW - anionic additive

KW - carborane

KW - pi-coordination

KW - cyclophane

U2 - 10.1016/j.talanta.2003.12.012

DO - 10.1016/j.talanta.2003.12.012

M3 - Artikel

SN - 0039-9140

VL - 63

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