title: An azobenzene unit embedded in a cyclopeptide as a type-specific and spatially directed switch.
abstract: By embedding an azobenzene unit into a chiral scaffold, switching of azobenzene from the trans-(P) isomer to the cis-(P) isomer and back was achieved (black arrows in picture). The embedding leads to a flipping process in which the phenyl rings can only move directly towards one another in the switching process.
authors.affiliation: Institut für Organische Chemie, Fakultät für Chemie, Universität Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany. gebhard.haberhauer@uni-due.de
authors.forename: Gebhard
authors.initials: G
authors.lastname: Haberhauer
authors.forename: Christine
authors.initials: C
authors.lastname: Kallweit
authors.forename: Christoph
authors.initials: C
authors.lastname: Wölper
authors.forename: Dieter
authors.initials: D
authors.lastname: Bläser
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D001391:Azo Compounds; D010456:Peptides, Cyclic; C009850:azobenzene
keywords: azo compounds; circular dichroism; isomerization; molecular switches; photochemistry