Fig. 1
From: Giant intrinsic circular dichroism of prolinol-derived squaraine thin films
Early stage aggregation experiments in solution. a, b UV-vis spectra and c,d ellipticity spectra of (S,S)-ProSQ-C16 and (R,R)-ProSQ-C16 in mixtures of chloroform and acetonitrile, respectively. The concentration is approximately 5.7 μM. The volume fraction of acetonitrile is increased as indicated. The insets in a and b illustrate the proposed helical aggregation of the molecules as follows from the line shape of the CD bands. Note that these here are only sketches. In e a photograph of the stock solution and diluted solutions with increasing acetonitrile volume faction from left to right is shown
