Title: Conformational transitions in chiral, gallic acid-functionalized poly(dithienopyrrole): A comparative UV-vis and CD study
Authors: Vanormelingen, Wouter ×
Van Den Bergh, Karlien
Verbiest, Thierry
Koeckelberghs, Guy #
Issue Date: Aug-2008
Publisher: Amer chemical soc
Series Title: Macromolecules vol:41 issue:15 pages:5582-5589
Abstract: An achiral and chiral poly(dithieno[3,2-b:2',3'-d]pyrrole) (PDTP), substituted with a gallic acid-derived moiety, was prepared by a Stille coupling, and the supramolecular behavior in solution was studied. In a good solvent (THE), the polymers are present as unordered, highly conjugated, rigid-rod-like strands. Upon addition of a nonsolvent (hexane) or in toluene, the polymer strands adopt a helical conformation in contrast to previously reported alkyl-substituted PDTPs, which aggregate by decreasing the solvent quality. The folding and unfolding process was investigated by probing the UV-vis and CD intensifies at different wavelengths and temperatures. On the basis of these experiments, it could be concluded that the helical folding and unfolding is a single-step process. The PDTP could also be oxidized and rereduced, and thus, in principle, a molecular solenoid can be obtained.
ISSN: 0024-9297
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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