Assessment of a chromogenic calix[4]arene for the rapid colorimetric detection of trimethylamine
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 4 (2) , 217-221
- https://doi.org/10.1039/jm9940400217
Abstract
A calix[4]arene bearing nitrophenylazophenol chromogenic moieties when complexed with lithium has been synthesized and examined as a visual indicator for the presence of gaseous amines such as trimethylamine (TMA). The complexed calixarene has been immobilised onto filter paper and found to undergo a dramatic colour change from yellow to red in the presence of gaseous TMA at concentrations above 20 ppb in under 2 min. The intensity of the colour produced is TMA-concentration dependent.Keywords
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