Symmetric anionic polymethine dyes derived from fluorene and its derivatives with electron-acceptor substituents: Synthesis and spectral properties
Novel anionic polymethine dyes were synthesized from 2,7- bis(phenoxysulfonyl)-, 2,7-dinitro-, and 2,4,5,7-tetranitrofluorenes. The reasons for the complicated shape of their absorption spectra were analyzed: the formation of contact ion pairs, associates
Get Best Price for1416045-82-32,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepin-1-ium 9-[(1E,3E)-5-(2,7bis-(phenoxysulfonyl)-9H-fluoren-9ylidene)penta-1,3-dienyl]-2,7-bis(phenoxysulfonyl)-9H-fluoren-9-ide