Electrochiroptical Response in Aqueous Media: 9,10-Dihydrophenanthrene-9,10-diyl Dications with Michlar's Hydrol Blue Chromophores Attached with Oligoethylene Glycol Units

摘要

Upon electrochemical oxidation of configurationally stable biphenyl-based electron donors (R_(ax)-1a and -lb to butane-1,4-diyl dications (M)-2a~(2+) and -2b~(2+), drastic changes were induced not only in UV-vis but also in CD spectra. Because of the hydrophilic oligoethylene glycol units on the amino nitrogens, (R_(ax)-1b and (M)-2b~(2+) are soluble in water, thus realizing the electrochiroptical behavior not only in organic solvents but also in aqueous media.