Towards Macroscopically Anisotropic Functionality: Oriented Metallo‐supramolecular Polymeric Materials Induced by Magnetic Fields
Tsung‐Han Tu, Tsuneaki Sakurai, Shu Seki, Yasuhiro Ishida, Yi‐Tsu Chan
Abstract
Abstract 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.