Simon, P. published the artcileNew NIR dyes for ammonia sensing, Computed Properties of 606-55-3, the publication is Sensors and Actuators, B: Chemical (2003), 90(1-3), 9-14, database is CAplus.
Three series of new cyanine dyes were synthesized and the visible-NIR spectra of the dyes were measured and interpreted by semi-empirical methods of quantum chem. As a basic building block for the synthesis, 4-(dimethylaminomethylene)-5-oxo-2-furfurylidenedimethyliminium perchlorate (I) was used. The dyes were prepared by condensing I with appropriate salts. The tests for sensitivity to ammonia showed that mono-substituted dyes III are reversibly sensitive to ammonia in ethanol solutions The dyes exhibit a peak at 620-680 nm arising from the interaction with ammonia and, hence, these dyes are promising as chem. transducers for distributed fiber-optic ammonia sensors.
Sensors and Actuators, B: Chemical published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C6H13BO3, Computed Properties of 606-55-3.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com