Polymeric Composite Materials for the Detection of Barium Ions in Aqueous Solutions

Scheme 1

Synthesis route of the dye OMS: iodide 1-methyl-4 - [(E) -2- (16-methyl-2,3,5,6,8,9,11,12,15,16-decahydro-14H-1,4,7,10,13,16-benzopentaoxaazazocycloooctadecine-19-yl) -vinyl] pyridinium (compound 1) using 1,4-dimethylpyridinium iodide (compound 2), N-methylbenzoase-18-crown-6-ether (compound 3), etc. (synthesized in the Photochemistry Center of the Russian Academy of Sciences by. Gromov [4]).