Water-soluble anthracene derivatives containing carboxy, dihydroxyphosphinyl, or pyridinium fragments bound via methylene groups to 9- and 10-carbon atoms were prepared, and their spectra, solubility, and reactivity toward singlet oxygen were studied. Using sodium alpha,alpha '-(anthracene-9,10-diyl)bis(methylmalonate) as acceptor, it is possible to determine the quantum efficiency of singlet oxygen generation in aqueous solutions and in microheterogeneous media in the presence of biomacromolecules.
The title compound, 9,10-bis(1-pyridiniomethyl)anthracene dichloride, crystallizes as the methanol/water solvate C26H22N22+.2Cl-.2CH(3)OH.H2O, with a one-dimensional network of hydrogen bonds. Two formula units make up the asymmetric unit. The pyridine rings are on the same side of the anthracene plane.