title: Supramolecular Nanoparticles via Single-Chain Folding Driven by Ferrous Ions.
abstract: Single-chain nanoparticles can be obtained via single-chain folding assisted by intramolecular crosslinking reversibly or irreversibly. Single-chain folding is also an efficient route to simulate biomacromolecules. In present study, poly(N-hydroxyethylacrylamide-co-4'-(propoxy urethane ethyl acrylate)-2,2':6',2''-terpyridine) (P(HEAm-co-EMA-Tpy)) is synthesized via reversible addition fragmentation chain transfer polymerization. Single-chain folding and intramolecular crosslinking of P(HEAm-co-EMA-Tpy) are achieved via metal coordination chemistry. The intramolecular interaction is characterized on ultraviolet/visible spectrophotometer (UV-vis spectroscopy), proton nuclear magnetic resonance ((1)H NMR), and differential scanning calorimetry (DSC). The supramolecular crosslinking mediated by Fe(2+) plays an important role in the intramolecular collapsing of the single-chain and the formation of the nanoparticles. The size and morphology of the nanoparticles can be controlled reversibly via metal coordination chemistry, which can be characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), and atomic force microscope (AFM).
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
authors.forename: Hongting
authors.initials: H
authors.lastname: Pu
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Jin
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
authors.forename: Decheng
authors.initials: D
authors.lastname: Wan
mesh_terms: D005296:Ferrous Compounds / Q000737:chemistry*; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D005296:Ferrous Compounds; D011108:Polymers
keywords: ferrous ion; metal coordination; nanoparticles; single-chain folding; terpyridines