RT Journal Article
T1 Merging supramolecular and covalent helical polymers: four helices within a single scaffold
A1 Fernández Villar, Zulema
A1 Fernández Rodríguez, Berta
A1 Quiñoá Cabana, Emilio
A1 Freire Iribarne, Félix Manuel
K1 Chemical structure
K1 Circular dichroism spectroscopy
K1 Materials
K1 Polymer scaffolds
K1 Polymers
AB Supramolecular and covalent polymers share multiple structural effects such as chiral amplification, helical inversion, sergeants and soldiers, or majority rules, among others. These features are related to the axial helical structure found in both types of materials, which are responsible for their properties. Herein a novel material combining information and characteristics from both fields of helical polymers, supramolecular (oligo(p-phenyleneethynylene) (OPE)) and covalent (poly(acetylene) (PA)), is presented. To achieve this goal, the poly(acetylene) must adopt a dihedral angle between conjugated double bonds (ω1) higher than 165°. In such cases, the tilting degree (Θ) between the OPE units used as pendant groups is close to 11°, like that observed in supramolecular helical arrays of these molecules. Polymerization of oligo[(p-phenyleneethynylene)n]phenylacetylene monomers (n = 1, 2) bearing L-decyl alaninate as the pendant group yielded the desired scaffolds. These polymers adopt a stretched and almost planar polyene helix, where the OPE units are arranged describing a helical structure. As a result, a novel multihelix material was prepared, the ECD spectra of which are dominated by the OPE axial array
PB ACS Publications
SN 0002-7863
YR 2021
FD 2021
LK http://hdl.handle.net/10347/29026
UL http://hdl.handle.net/10347/29026
LA eng
NO J. Am. Chem. Soc. 2021, 143, 20962–20969. https://doi.org/10.1021/jacs.1c10327
NO Financial support from MICINN (PID2019-109733GB-I00, PID2020-117605GB-100), Xunta de Galicia (ED431C 2018/30, PID2020-117605GB-100, Centro Singular de Investigación de Galicia acreditación 2019-2022, ED431G 2019/03), and the European Regional Development Fund (ERDF) is gratefully acknowledged
DS Minerva
RD 25 abr 2026