RT Journal Article
T1 Dynamic chiral PPA–AgNP nanocomposites: aligned silver nanoparticles decorating helical polymers
A1 Núñez Martínez, Manuel
A1 Arias López, Sandra
A1 Quiñoá Cabana, Emilio
A1 Riguera Vega, Ricardo
A1 Freire Iribarne, Félix Manuel
K1 Ions
K1 Metal nanoparticles
K1 Metals
K1 Nanocomposites
K1 Polymers
AB A novel approach to prepare stimulus-sensitive nanocomposites is described, based on a dynamic helical polymer, chiral poly(phenylacetylene) (PPA), and silver nanoparticles. To preserve the dynamic helical behavior of PPA within the nanocomposite, a weak and adaptive supramolecular interaction, such as that between amide group–silver nanoparticle, is used to link the metal nanoparticle to the polymer. To prepare the composite, we chose PPA as a helical polymer that bears an amide group as a monomer repeating unit, poly-(R)-1, which can coordinate with Ag+ ions. The silver ions that form complexes with the pendant groups are further reduced, through the use of NaBH4, to AgNPs that are stabilized by the amide groups of PPA. As a result, 2.8 nm silver nanoparticles are formed and aligned along the polymer chain with a regular 3.1 nm interparticle distance corresponding to the helical pitch of the polymer. The weak amide/AgNP interactions allow PPA to adopt either P or M helical structures on the AgNPs through supramolecular adaptive mechanisms induced by appropriate external stimuli
PB ACS Publications
SN 0897-4756
YR 2021
FD 2021
LK http://hdl.handle.net/10347/29027
UL http://hdl.handle.net/10347/29027
LA eng
NO Chem. Mater. 2021, 33, 4805−4812. https://doi.org/10.1021/acs.chemmater.1c00805
NO The authors thank Servicio de Microscopía Electrónica (RIAIDT, USC). Financial support from AEI (PID2019-109733GB-I00), Xunta de Galicia ED431C 2018/30, Centro Singular de Investigación de Galicia acreditación 2019–2022, ED431G 2019/03, Beca Leonardo a Investigadores y Creadores Culturales 2020 de la Fundación BBVA, and the European Regional Development Fund (ERDF) is gratefully acknowledged. N.-M. thanks MICINN for a FPI contract (BES-2016-078107)
DS Minerva
RD 24 abr 2026