Persistence Length of PEGMA Bottle Brushes Determined by Pyrene Excimer Fluorescence.

ABSTRACT: Seven pyrene-labeled poly(oligo(ethylene glycol) methyl ether methacrylate)s (PyEG₅-PEG_nMAs) were prepared with n = 0, 3, 4, 5, 7, 9, and 19 ethylene glycol units by copolymerizing a small amount of penta(ethylene glycol) 1-pyrenemethyl ether methacrylate with an EG_nMA monomer. The conformation of the PyEG₅-PEG_nMA polymers evolved from a random coil for PyEG₅-PEG₀MA or poly(methyl methacrylate) to a polymeric bottle brush (PBB) architecture with increasing side chain length. The fluorescence decays of the PyEG₅-PEG_nMA samples were fitted according to the fluorescence blob model (FBM) whose parameters were used, in combination with the Kratky-Porod equation, to calculate the persistence

SUBMITTER: Thoma JL 

PROVIDER: S-EPMC10575010 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature