Anion-induced switching of the helical orientation of a chiral indolocarbazole dimer
作者:Hyun Ji Lee、Hae-Geun Jeon、Kyu-Sung Jeong
DOI:10.1080/10610278.2014.941293
日期:2015.6.3
sensitive to the polarity of solvents. For example, the magnitude of the specific rotation ([α]D) is − 934° in CH2Cl2 and − 657° in CHCl3 but it is only − 75° in DMSO. These observations suggest that the dimer folds to a helical structure by intramolecular hydrogen bonds in relatively non-polar solvents but exists in an unfolded extended conformation in polar solvents such as DMSO. The dimer strongly