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dc.contributor.authorNuñez Martínez, Manuel
dc.contributor.authorArias López, Sandra
dc.contributor.authorQuiñoá Cabana, Emilio
dc.contributor.authorRiguera Vega, Ricardo
dc.contributor.authorFreire Iribarne, Félix Manuel
dc.identifier.citationChem. Mater. 2021, 33, 4805−4812.
dc.description.abstractA 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
dc.description.sponsorshipThe 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)
dc.publisherACS Publications
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109733GB-I00/ES/MATERIALES QUIRALES CON PROPIEDADES-ESTIMULO RESPUESTA: DISEÑO, SINTESIS Y APLICACIONES
dc.rights© 2021 American Chemical Society. This work is licenced under a Creative Commons Attribution 4.0 International licence (
dc.subjectMetal nanoparticles
dc.titleDynamic chiral PPA–AgNP nanocomposites: aligned silver nanoparticles decorating helical polymers
dc.contributor.affiliationUniversidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Química Orgánica

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© 2021 American Chemical Society. This work is licenced under a Creative Commons Attribution 4.0 International licence (
Except where otherwise noted, this item's license is described as  © 2021 American Chemical Society. This work is licenced under a Creative Commons Attribution 4.0 International licence (

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