Circular dichroism and circularly polarised luminescence of bipyrenyl oligopeptides, with piperidines added in the peptide chains. Issue 37 (24th August 2018)

• Record Type: Journal Article
• Authors: Mimura, Yuki; Kitamura, Sayaka; Shizuma, Motohiro; Kitamatsu, Mizuki; Imai, Yoshitane
• Is Part Of: Organic & biomolecular chemistry. Volume 16:Issue 37(2018)
• Page Start: 8273
• Page End: 8279
• Publication Date: 2018-08-24
• Subjects: Chemistry, Organic -- Periodicals; Bioorganic chemistry -- Periodicals; Chemistry, Physical organic -- Periodicals; 547
• DOI: 10.1039/c8ob01869c
• Languages: English
• ISSNs: 1477-0520

Abstract

Abstract : We found that chiral oligopeptides bearing two-pendant pyrenyl units exhibited circularly polarised luminescence (CPL) originating from intramolecular excimers in various solvents, and the sign of their CPL signals depended on the solvent and piperidine unit in peptide chain. Abstract : Upon combining chiral peptides (the most basic chiral source) with pyrene moieties, we found that chiral oligopeptides bearing two-pendant pyrenyl units exhibited circularly polarised luminescence (CPL) originating from intramolecular excimers at 450–490 nm in various solvents, and the sign of their CPL signals depended on the type of solvent employed. The CPL and circular dichroism signs and intensities could be tuned by the introduction of a piperidine unit into the chiral peptide chain; thus, the obtained structure could be considered a practical Lock ON–OFF system for oligopeptide luminophores.