Werner, Tobias and Kuerner, Jens M. and Krause, Christian and Wolfbeis, Otto S. (2000) New longwave absorbing chromogenic calix[4]arene for calcium determination in aqueous environment. ANALYTICA CHIMICA ACTA, 421 (2). pp. 199-205. ISSN 0003-2670
Full text not available from this repository. (Request a copy)Abstract
A new calcium ion selective and water-soluble calix[4]arene chromoionophore has been synthesised from the 25,27-bis[(ethoxycarbonyl)methoxyl-26,28-dihydroxy-calix[4]arene (1) and the N4,N4-diethyl-2-methyl-1,4-phenylenediamine-6-sulfonic acid (2). The 1,3-bis(indoaniline)-derived 2,4-bis-[(ethylcarbonyl)methoxy]-calix[4]arene (3) was obtained by introducing sulfonic groups into a phenylenediamine-derived chromophore followed by oxidative incorporation of two units of 2 into 1. The new chromophoric calix[4]arene 3 possesses an absorbance maximum at 604 nm in buffered aqueous environment. Upon complexation of calcium a bathochromic shift of 84 nm occurs along with an increase in the absorption coefficient. The dissociation constants and the cross sensitivity to other alkali and alkaline earth ions were evaluated. (C) 2000 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ION SENSOR; PERFORMANCE; RECOGNITION; IONOPHORES; RECEPTOR; DESIGN; OXIDE; calcium; calixarene; chromophores; sensors; receptors |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Mar 2022 07:19 |
| Last Modified: | 23 Mar 2022 07:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42197 |
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