RT Journal Article
T1 P/M Macromolecular Switch Based on Conformational Control Exerted by an Achiral Side Chain within an Axially Chiral Locked Pendant
A1 Lago Silva, María
A1 Cid, María Magdalena
A1 Quiñoá Cabana, Emilio
A1 Freire Iribarne, Félix Manuel
AB Molecular switches, supramolecular chemistry, and polymers can be combined to create stimuli-responsive multichiral materials. Therefore, by acting on the extended/bent conformational composition of an achiral arm, it is possible to create a macromolecular gear, where different supramolecular interactions can be activated/deactivated to control the helical sense of a polymer containing up to five different chiral axial motifs. For this, a chiral allene with a flexible achiral arm was introduced as a pendant in poly(phenylacetylene). Through flexible arm control between extended and bent conformations, it is possible to selectively induce either a P or M helical sense in the polymer, while the relative spatial distribution of the substituents in the allene remains unaltered in two perpendicular planes (configurationally locked). These results show that complex dynamic multichiral materials can be obtained by the polymerization of appropriate monomers that combine chirality, switching properties, and the ability to generate chiral supramolecular assemblies.
PB American Chemical Society
SN 0002-7863
YR 2023
FD 2023
LK http://hdl.handle.net/10347/33032
UL http://hdl.handle.net/10347/33032
LA eng
NO María Lago-Silva, María Magdalena Cid, Emilio Quiñoá, and Félix Freire. P/M Macromolecular Switch Based on Conformational Control Exerted by an Achiral Side Chain within an Axially Chiral Locked Pendant. Journal of the American Chemical Society 2024 146 (1), 752-759
NO We thank financial support from AEI (PID2019-109733GB-I00, PID2021-128057NB-I00, and PID2022-136848NB-100), Xunta de Galicia (ED431C 2022/21, Centro Singular de Investigación de Galicia acreditación 2019-2022, ED431G 2019/03, and the European Regional Development Fund (ERDF). M.L. also thanks Xunta de Galicia for a predoctoral contract. We are also thankful for Servicio de Nanotecnología y Análisis de Superficies (CACTI-CINBIO, UVigo) the use of the RIAIDT-USC analytical facilities and CESGA for CPU time.
DS Minerva
RD 28 abr 2026