Synthesis and self-assembly nanostructures of pyrene-containing amphiphilic fluorinated copolymers and their oxygen sensing application

Abstract

We synthesized pyrene-containing amphiphilic fluorinated copolymers p(C₇F₁₅MAA/PyMMA)s through free radical polymerization. The pyrene composition ratio was readily tuned from 0.6 to 3 mol% with different monomer feeding ratios, designated as p(C₇F₁₅MAA/PyMMA0.6) and p(C₇F₁₅MAA/PyMMA3). p(C₇F₁₅MAA/PyMMA) nanoparticle films were prepared by dropcasting copolymer solutions onto substrates with the mixture of AK-225 and acetic acid. The copolymer nanoparticle film surfaces exhibited superhydrophobic character with a water contact angle of greater than 160^° and low surface free energy (< 19 mN m⁻¹). The emission from the p(C₇F₁₅MAA/PyMMA0.6) nanoparticle film was dominated with monomeric emission, while that from the p(C₇F₁₅MAA/PyMMA3) nanoparticle film showed mainly excimer emission. The dissolved oxygen sensing performance of the nanoparticle films was also investigated in terms of the different emission modes.

Keywords:

• Fluorescence
• fluorinated polymer
• pyrene
• superhydrophobic

Additional information

Funding

The work was supported by the Research Program of “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials” in Network Joint Research Center for Materials and Devices. H. Zhu appreciates financial support from The Japan Prize Foundation. M. Mitsuishi thanks The Ogasawara Foundation for the Promotion of Science & Engineering for financial support.