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Towards Macroscopically Anisotropic Functionality: Oriented Metallo‐supramolecular Polymeric Materials Induced by Magnetic Fields
Author(s) -
Tu TsungHan,
Sakurai Tsuneaki,
Seki Shu,
Ishida Yasuhiro,
Chan YiTsu
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202012284
Subject(s) - materials science , photoconductivity , supramolecular chemistry , polymer , fourier transform infrared spectroscopy , copolymer , spectroscopy , conductivity , small angle x ray scattering , evaporation , anisotropy , chemical engineering , polymer chemistry , crystallography , chemistry , scattering , composite material , crystal structure , optoelectronics , optics , physics , quantum mechanics , engineering , thermodynamics
Based on the predesigned self‐selective complexation, metallo‐supramolecular P3HT‐ b ‐PEO diblock copolymers with varying block ratios were synthesized, and their oriented polymer films generated during solvent evaporation in a 9 T magnetic field were investigated. An anisotropic, ordered layer structure was achieved using [ P3HT 20 ‐Zn‐ PEO 107 ] and carefully characterized by polarized optical microscopy (POM), AFM, polarized UV/Vis spectroscopy, and GI‐SAXS/WAXS. The PEO‐removed [ P3HT 20 ‐Zn‐ PEO 107 ] film was obtained after decomplexation with TEA‐EDTA under mild conditions, and the selective removal of PEO domains was evidenced by UV/Vis and ATR‐FTIR spectroscopy. Anisotropic photoconductivity of the magnetically aligned film was evaluated by flash‐photolysis time‐resolved microwave conductivity (FP‐TRMC) measurements. The results indicated that the presence of insulating crystalline PEO segments diminished the photoconductivity along the P3HT backbone direction.