Salt Effects on the Apparent Stability of the Cucurbit[7]uril-Methyl Viologen Inclusion Complex

Winston Ong; Angel E. Kaifer

doi:10.1021/jo035030+

Salt Effects on the Apparent Stability of the Cucurbit[7]uril-Methyl Viologen Inclusion Complex

Winston Ong, Angel E. Kaifer

Chemistry

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

198 Scopus citations

Abstract

The effects of the medium ionic composition on the apparent equilibrium association constant (K) for the formation of a 1:1 inclusion complex between the guest methyl viologen (MV²⁺) and the host cucurbit[7]uril (CB7) were studied in aqueous solutions. The K values were found to decrease with increasing ionic strength, with more pronounced effects for solutions containing divalent Ca²⁺ ions than for solutions containing monovalent Na⁺ ions. The competing ion-dipole interactions between Ca²⁺ or Na⁺ and MV²⁺ ions appear to be responsible for the remarkable modulation of the K values observed in this work.

Original language	English (US)
Pages (from-to)	1383-1385
Number of pages	3
Journal	Journal of Organic Chemistry
Volume	69
Issue number	4
DOIs	https://doi.org/10.1021/jo035030+
State	Published - Feb 20 2004

ASJC Scopus subject areas

Organic Chemistry

Access to Document

10.1021/jo035030+

Fingerprint Dive into the research topics of 'Salt Effects on the Apparent Stability of the Cucurbit[7]uril-Methyl Viologen Inclusion Complex'. Together they form a unique fingerprint.

Cite this

@article{a7f0f6bed38e4681b898794e72892e25,

title = "Salt Effects on the Apparent Stability of the Cucurbit[7]uril-Methyl Viologen Inclusion Complex",

abstract = "The effects of the medium ionic composition on the apparent equilibrium association constant (K) for the formation of a 1:1 inclusion complex between the guest methyl viologen (MV2+) and the host cucurbit[7]uril (CB7) were studied in aqueous solutions. The K values were found to decrease with increasing ionic strength, with more pronounced effects for solutions containing divalent Ca2+ ions than for solutions containing monovalent Na+ ions. The competing ion-dipole interactions between Ca2+ or Na+ and MV2+ ions appear to be responsible for the remarkable modulation of the K values observed in this work.",

author = "Winston Ong and Kaifer, {Angel E.}",

year = "2004",

month = feb,

day = "20",

doi = "10.1021/jo035030+",

language = "English (US)",

volume = "69",

pages = "1383--1385",

journal = "Journal of Organic Chemistry",

issn = "0022-3263",

publisher = "American Chemical Society",

number = "4",

}

TY - JOUR

T1 - Salt Effects on the Apparent Stability of the Cucurbit[7]uril-Methyl Viologen Inclusion Complex

AU - Ong, Winston

AU - Kaifer, Angel E.

PY - 2004/2/20

Y1 - 2004/2/20

N2 - The effects of the medium ionic composition on the apparent equilibrium association constant (K) for the formation of a 1:1 inclusion complex between the guest methyl viologen (MV2+) and the host cucurbit[7]uril (CB7) were studied in aqueous solutions. The K values were found to decrease with increasing ionic strength, with more pronounced effects for solutions containing divalent Ca2+ ions than for solutions containing monovalent Na+ ions. The competing ion-dipole interactions between Ca2+ or Na+ and MV2+ ions appear to be responsible for the remarkable modulation of the K values observed in this work.

AB - The effects of the medium ionic composition on the apparent equilibrium association constant (K) for the formation of a 1:1 inclusion complex between the guest methyl viologen (MV2+) and the host cucurbit[7]uril (CB7) were studied in aqueous solutions. The K values were found to decrease with increasing ionic strength, with more pronounced effects for solutions containing divalent Ca2+ ions than for solutions containing monovalent Na+ ions. The competing ion-dipole interactions between Ca2+ or Na+ and MV2+ ions appear to be responsible for the remarkable modulation of the K values observed in this work.

UR - http://www.scopus.com/inward/record.url?scp=1242329836&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1242329836&partnerID=8YFLogxK

U2 - 10.1021/jo035030+

DO - 10.1021/jo035030+

M3 - Article

C2 - 14961699

AN - SCOPUS:1242329836

VL - 69

SP - 1383

EP - 1385

JO - Journal of Organic Chemistry

JF - Journal of Organic Chemistry

SN - 0022-3263

IS - 4

ER -