| The supramolecular chemistry of carbon dioxide (CO2 ) was investigated for sensing purposes. Secondary cis-amides, such as 1 and 3, are capable of participating in a two-point interaction with CO2 in nonpolar solutions.;The well-known chemistry between CO2 and primary amines was revisited as a means for direct sensing of the dissolved gas. Aromatic amines 4 and 5 react reversibly with CO2 to form observable carbamic acid intermediates. A strong increase in fluorescence intensity is observed as a direct result of carbamic acid formation. The evaluation of naphthylglycine as a sensor for CO2 is also reported for potential use under aqueous conditions. |
