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An Ionophore-Based Anion-Selective Optode Printed on Cellulose Paper.
- Source :
-
Angewandte Chemie International Edition . 9/18/2017, Vol. 56 Issue 39, p11826-11830. 5p. - Publication Year :
- 2017
-
Abstract
- A general anion-sensing platform is reported based on a portable and cost-effective ion-selective optode and a smartphone detector equipped with a color analysis app. In contrast to traditional anion-selective optodes using a hydrophobic polymer and/or plasticizer to dissolve hydrophobic sensing elements, the new optode relies on hydrophilic cellulose paper. The anion ionophore and a lipophilic pH indicator are inkjet-printed and adsorbed on paper and form a 'dry' hydrophobic sensing layer. Porous cellulose sheets also allow the sensing site to be modified with dried buffer that prevents any sample pH dependence of the observed color change. A highly selective fluoride optode using an AlIII-porphyrin ionophore is examined as an initial example of this new anion sensing platform for measurements of fluoride levels in drinking water samples. Apart from Lewis acid-base recognition, hydrogen bonding recognition is also compatible with this sensing platform. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IONOPHORES
*OPTODES
*CELLULOSE
*ANIONS
*HYDROPHOBIC compounds
*INK-jet printing
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 56
- Issue :
- 39
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 125188606
- Full Text :
- https://doi.org/10.1002/anie.201706147