Abstract
In order to use chemically selective optode membranes in monolithically integrated optical sensors, the membrane's optical signal output ideally has to be in the near-infrared (NIR) wavelength range. Dyes showing light absorbance in the NIR range have been evaluated for their suitability as chromoionophores in plasticized poly(vinyl chloride) (PVC) membranes. The influence of the membrane plasticizer polarity on the optical properties and on the acidity of the dye has been investigated. It is shown that the pKa of the chromoionophore in the membrane phase can be shifted by changing the plasticizer polarity.
| Original language | English |
|---|---|
| Pages (from-to) | 202-206 |
| Number of pages | 5 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 39 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1997 |
| Externally published | Yes |
Keywords
- Chromoionophores
- Integrated optical sensors
- Near-infrared dyes
- Plasticizers
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry