title: Circularly Polarized Luminescence of Chiral Perylene Diimide Based Enantiomers Triggered by Supramolecular Self-Assembly.
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.
authors.affiliation: Key Lab of Mesoscopic Chemistry of MOE and, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and, Computational Chemistry School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
authors.forename: Yunzhi
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China.
authors.forename: Guo
authors.initials: G
authors.lastname: Wei
authors.affiliation: Key Lab of Mesoscopic Chemistry of MOE and, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and, Computational Chemistry School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China. shuhua@nju.edu.cn.
authors.forename: Shuhua
authors.initials: S
authors.lastname: Li
authors.affiliation: Key Lab of Mesoscopic Chemistry of MOE and, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China. yxcheng@nju.edu.cn.
authors.forename: Yixiang
authors.initials: Y
authors.lastname: Cheng
keywords: amino acids; circular dichroism; circularly polarized luminescence; perylene diimides; self-assembly