title: Consecutive conformational transitions and deaggregation of multiple-helical poly(diacetylene)s.
abstract: The polymerization of diacetylene macromonomers based on oligopeptide-polymer conjugates yields conjugated polymers with multiple-helical quaternary structures. These polymers exhibit a rich dynamic folding behavior upon the addition of protic cosolvents. Thus, a helix-helix transition under helix-sense inversion was followed by a reversible helix-coil transition. Both transitions involved changes in the aggregation state of the multiple-helical superstructures. The resemblance of the observed consecutive and cooperative conformational transitions to those of biopolymers underlines the importance of supramolecular self-assembly as a pathway toward biofunctional materials with optoelectronic activity.
authors.affiliation: Department of Materials, ETH Zürich, Zürich, Switzerland.
authors.forename: Jan
authors.initials: J
authors.lastname: Weiss
authors.forename: Eike
authors.initials: E
authors.lastname: Jahnke
authors.forename: Nikolai
authors.initials: N
authors.lastname: Severin
authors.forename: Jürgen P
authors.initials: JP
authors.lastname: Rabe
authors.forename: Holger
authors.initials: H
authors.lastname: Frauenrath
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D013499:Surface Properties
chemical_list: D000480:Alkynes; D046911:Macromolecular Substances