2021/05/12 by Manuel Núñez-Martínez, Manuel Núñez‐Martínez, Sandra Arias +3
Chemistry · Materials Science · #Polydiacetylene-based materials and applications #Supramolecular Self-Assembly in Materials #Synthesis and Properties of Aromatic Compounds
paper · doi:10.1021/acs.chemmater.1c00805
openalex publication_date 2021/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
High Resolution Image Download MS PowerPoint Slide 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 NaBH 4, 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.