The underestimated role of counter ions in electrostatic self-assembly: [1+1]cavitand-calix[4]arene capsules based on azinium-sulfonate interactions

G. Oshovsky; David Reinhoudt; Willem Verboom

doi:10.1002/ejoc.200600163

The underestimated role of counter ions in electrostatic self-assembly: [1+1]cavitand-calix[4]arene capsules based on azinium-sulfonate interactions

G. Oshovsky, David Reinhoudt, Willem Verboom

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

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Abstract

The apparent Ka values of the formation of [1+1] cavitand-calix[4]arene capsules, based on azinium-sulfonate electrostatic interactions, obtained by direct titration experiments are concentration dependent due to the influence of the interaction of the charged capsule components with their initial counterions. 1H NMR and UV dilution experiments, in which this ion-pairing is excluded, gave Ka-values larger than 2·106 M-1 in methanol and methanol/water (1:1) for the capsule formation. The capsule encapsulates small guests like methanol, ethanol, etc., as proven by ESI-MS

Original language	Undefined
Pages (from-to)	2810-2816
Number of pages	7
Journal	European journal of organic chemistry
Volume	2006
Issue number	12
DOIs	https://doi.org/10.1002/ejoc.200600163
Publication status	Published - 2006

Keywords

METIS-232161
IR-59259

Access to Document

10.1002/ejoc.200600163

Cite this

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abstract = "The apparent Ka values of the formation of [1+1] cavitand-calix[4]arene capsules, based on azinium-sulfonate electrostatic interactions, obtained by direct titration experiments are concentration dependent due to the influence of the interaction of the charged capsule components with their initial counterions. 1H NMR and UV dilution experiments, in which this ion-pairing is excluded, gave Ka-values larger than 2·106 M-1 in methanol and methanol/water (1:1) for the capsule formation. The capsule encapsulates small guests like methanol, ethanol, etc., as proven by ESI-MS",

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T1 - The underestimated role of counter ions in electrostatic self-assembly: [1+1]cavitand-calix[4]arene capsules based on azinium-sulfonate interactions

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AU - Reinhoudt, David

AU - Verboom, Willem

PY - 2006

Y1 - 2006

N2 - The apparent Ka values of the formation of [1+1] cavitand-calix[4]arene capsules, based on azinium-sulfonate electrostatic interactions, obtained by direct titration experiments are concentration dependent due to the influence of the interaction of the charged capsule components with their initial counterions. 1H NMR and UV dilution experiments, in which this ion-pairing is excluded, gave Ka-values larger than 2·106 M-1 in methanol and methanol/water (1:1) for the capsule formation. The capsule encapsulates small guests like methanol, ethanol, etc., as proven by ESI-MS

AB - The apparent Ka values of the formation of [1+1] cavitand-calix[4]arene capsules, based on azinium-sulfonate electrostatic interactions, obtained by direct titration experiments are concentration dependent due to the influence of the interaction of the charged capsule components with their initial counterions. 1H NMR and UV dilution experiments, in which this ion-pairing is excluded, gave Ka-values larger than 2·106 M-1 in methanol and methanol/water (1:1) for the capsule formation. The capsule encapsulates small guests like methanol, ethanol, etc., as proven by ESI-MS

KW - METIS-232161

KW - IR-59259

U2 - 10.1002/ejoc.200600163

DO - 10.1002/ejoc.200600163

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