Electrochiroptical Response in Aqueous Media: 9,10-Dihydrophenanthrene-9,10-diyl Dications with Michlar’s Hydrol Blue Chromophores Attached with Oligoethylene Glycol Units
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Upon electrochemical oxidation of configurationally stable biphenyl-based electron donors (<i>R</i><sub>ax</sub>)-<b>1a</b> and -<b>1b</b> to butane-1,4-diyl dications (<i>M</i>)-<b>2a</b><sup>2+</sup> and -<b>2b</b><sup>2+</sup>, 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, (<i>R</i><sub>ax</sub>)-<b>1b</b> and (<i>M</i>)-<b>2b</b><sup>2+</sup> are soluble in water, thus realizing the electrochiroptical behavior not only in organic solvents but also in aqueous media.
- Chemistry Letters
Chemistry Letters 43(7), 982-984, 2014
The Chemical Society of Japan