Multi-Functional Janus Particles Composed of Azo Polymer and Pyrene-Containing Polymer

Langmuir : the ACS Journal of Surfaces and Colloids
Chuyi LiaoXiaogong Wang

Abstract

This study investigated Janus particles (JPs) composed of an azo polymer and a pyrene-containing polymer, focusing on preparation, formation mechanism, photoinduced deformation behavior, and fluorescent properties as well as tunable colors of the dispersions. A methacrylate-based copolymer containing pyrenyl groups (P(MMA-co-PyMA)) and two azo polymers, i.e. a methacrylate-based polymer (PCNAZO) and an epoxy-based polymer (CH-TZ-NT) both bearing push-pull type azo chromophores, were synthesized for this purpose. Two types of Janus particles, P(MMA-co-PyMA)/PCNAZO JPs and P(MMA-co-PyMA)/CH-TZ-NT JPs, were fabricated through micro-phase separation of the components in the droplets dispersed in aqueous media, induced by evaporation of the organic solvent. The process of JP formation was thoroughly investigated by exploiting the function of pyrene moieties as a molecular probe through measuring the fluorescence emission spectra at different time during the structure evolution. The PL intensity, excimer emission and vibrational fine structure of the fluorescence spectra were observed to give information about phase-separation and solidification occurred in the dispersed droplets. The observations were rationalized by analysis with t...Continue Reading

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Citations

Nov 17, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Chuyi LiaoXiaogong Wang
Sep 30, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Chuyi Liao, Xiaogong Wang
Dec 4, 2020··Shahad Dakhel KhalafZeid Hassan Abood

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