Published Online: 15 MAR 2012
Copyright © 2012 John Wiley & Sons, Ltd. All rights reserved.
Supramolecular Chemistry: From Molecules to Nanomaterials
How to Cite
Maeda, H. and Anzenbacher, P. 2012. Colorimetric Sensors. Supramolecular Chemistry: From Molecules to Nanomaterials. .
- Published Online: 15 MAR 2012
This chapter is devoted to colorimetric sensors and sensors that utilize changes in absorption of light in general as a signal output to provide the evidence for sensor-analyte association. First, the photophysical processes associated with absorption of light and the molecular orbital reasons for color change are discussed. The following sections give a brief explanation of typical molecular architectures used in colorimetric sensor design as well as a typical instrumentation used in such studies. The following sections describe colorimetric sensors for cations, anions, and electroneutral molecules or zwitterions such as amino acids. Finally, alternative approaches utilizing, for example, hybrid organic-inorganic materials, self-signaling polymers, and materials utilizing changes in structural color output are also briefly discussed.
- light absorption;