Title
Circularly Polarized Luminescence of Chiral Perylene Diimide Based Enantiomers Triggered by Supramolecular Self-Assembly
Author
Fei Li, Yunzhi Li, Guo Wei, Yuxiang Wang, Shuhua Li, Yixiang Cheng
Year
2016
Journal
Chemistry - A European Journal
Abstract
Two perylene diimide (PDI) enantiomers (d/l-PDI) incorporating the d/l-alanine moiety have been designed and synthesized. d/l-PDI in chloroform displays bright-yellow fluorescence that is redshifted to orange-red when the solvent contains a methanol fraction of 99 vol %. No circular dichroism (CD) or circularly polarized luminescence (CPL) signals were observed for d/l-PDI enantiomers in CHCl3. Interestingly, the d/l-PDI enantiomers exhibit clear mirror-image Cotton effects and CPL emission in the aggregate state. The optical anisotropy factor (glum) is as high as 0.02 at fm=99 %, which can be attributed to self-assembly through intermolecular π–π interactions in the aggregate state.
Instrument
J-810
Keywords
Circular dichroism, Circularly polarized luminescence, Stereochemistry, Materials