Alizarin Complexone on Nanocrystalline TiO2: A Heterogeneous Approach to Anion Sensing
- 11 February 2004
- journal article
- research article
- Published by Wiley in Advanced Functional Materials
- Vol. 14 (2) , 111-115
- https://doi.org/10.1002/adfm.200304444
Abstract
A novel, heterogeneous approach to “naked‐eye” colorimetric and spectrophotometric anion sensing is demonstrated, employing the molecular receptor alizarin complexone adsorbed onto a nanocrystalline, mesoporous TiO2 film. pH buffer action intrinsic to the TiO2 film allows dip sensing in aqueous solutions. This heterogeneous sensing system exhibits a high selectivity to F– and CN– anions, high sensitivity, a rapid response time, and excellent reusability.Keywords
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