@misc{10481/76650,
year = {2022},
month = {6},
url = {http://hdl.handle.net/10481/76650},
abstract = {Helical polymers such as
poly(phenylacetylene)s (PPAs) are interesting materials
due to the possibility of tuning their helical scaffold
(sense and elongation) once they have been prepared
and by the presence of external stimuli. The main
limitation in the application of PPAs is their poor
photostability. These polymers degrade under visible
light exposure through a photochemical electrocyclization
process. In this work, it was demonstrated, through
a selected example, how the photochemical degradation
in PPAs is directly related to their dynamic helical
behavior. Thus, while PPAs with dynamic helical
structures show poor photostability under UV/Vis light
exposure, poly-(R)-1, bearing an enantiopure sulfoxide
group as pendant group and designed to have a quasistatic
helical behavior, shows a large photostability due
to the restricted conformational composition at the
polyene backbone, needed to orient the conjugated
double bonds prior to the photochemical electrocyclization
process and the subsequent degradation of the
material.},
organization = {AEI (PID2019-109733GBI00)},
organization = {Ministerio de Ciencia e Innovación (PID2019-
107307RB-100 and PID2020-117605GB-100, PID2020-
113059GB-C21, PID2020-113059GB-C22)},
organization = {Xunta de Galicia
(ED431C 2018/30, ED431C 2021/40, Centro Singular de
Investigación de Galicia acreditación 2019–2022, ED431G
2019/03 and the European Regional Development Fund
(ERDF)},
publisher = {Wiley},
keywords = {Chiroptical properties},
keywords = {Dynamic Helices},
keywords = {Helical structures},
keywords = {Photostability},
keywords = {Poly(phenylacetylene)s},
title = {Photostability and Dynamic Helical Behavior in Chiral Poly(phenylacetylene)s with a Preferred Screw-Sense},
doi = {10.1002/anie.202207623},
author = {Rey-Tarrío, Francisco and Guisán-Ceinos, Santiago and Cuerva Carvajal, Juan Manuel and Miguel Álvarez, Delia and Ribagorda, María and Quiñoá, Emilio and Freire, Félix},
}