RT Journal Article
T1 Multistate Chiroptical Switch Triggered by Stimuli-Responsive Chiral Teleinduction
A1 Rodríguez Riego, Rafael
A1 Quiñoá Cabana, Emilio
A1 Riguera Vega, Ricardo
A1 Freire Iribarne, Félix Manuel
AB Teleinduction of chirality, from a distant chiral center in the pendant, to the helical backbone of a poly(phenylacetylene)(PPA) was demonstrated by using an achiral, flexible and well-organized spacer originating a multistate chiroptical switch. Two PPAseries, with pendants formed by one or two consecutive Gly residues C-attached to the PPA backbone and N-attached to (R)- or (S)-α-methoxy-α-trifluormethylacetic acid (MTPA), were prepared and the changes in the helical contain upon modification of the MTPAconformation by external stimuli (i.e., polarity of the media, metal cations) were examined. Chiral teleinduction, imposing oppositehelicities, was observed in the two polymer series due to the parallel β-sheet arrangements of the Gly residues orienting the chiral groupsin specific directions along the external part of the helices. This teleinduction can be tuned inducing either the P or M helical sense of thepolymer by controlled conformational changes on the chiral moiety attached to the achiral β-sheet spacer. This remote control of thehelix can be switched On/Off by favoring/disfavoring the β-sheet arrangement of the Gly residues resorting to changes on the temperatureand the addition of destabilizing agents (e.g., TFA)
PB American Chemical Society
SN 0897-4756
YR 2018
FD 2018-04-11
LK http://hdl.handle.net/10347/18879
UL http://hdl.handle.net/10347/18879
LA eng
NO Rodríguez, R., Quiñoá, E., Riguera, R., & Freire, F. (2018). Multistate Chiroptical Switch Triggered by Stimuli-Responsive Chiral Teleinduction. Chemistry Of Materials, 30(8), 2493-2497. doi: 10.1021/acs.chemmater.8b00800
NO This is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, Copyright © 2018 American Chemical Society after peer review and technical edityng by the publisher. To access the final edited and published work see: https://pubs.acs.org/doi/10.1021/acs.chemmater.8b00800
NO Financial support from MINECO (CTQ2014-61470-EXP, CTQ2015-70519-P), Xunta de Galicia (GRC2014/040, Centro singular deinvestigación de Galicia accreditation 2016-2019, ED431G/09) andthe European Regional Development Fund (ERDF) is gratefullyacknowledged. R. R. is grateful to MINECO for a FPI predoctoralfellowship
DS Minerva
RD 29 abr 2026