Synthesis of arylhydrazonochromone as PH sensors

Abstract EN

Coupling of the enaminone compound 3 with aryl diazonium salts affords the arylhydrazonochromones 6.

The latter showed a change in its colour upon changing the pH of the solution.

The sensitivity of these molecules was clear in the pH range of 6-11.

All four dyes start to show change in thiere visible spectra when the Ph starts to reach the basic range.