| 초록 |
To fabricate wireless switches which can be controlled by light, an asymmetric macrogelator (BP-Azo) composed of biphenyl and azobenzene mesogens is newly designed and successfully synthesized. The BP-Azo shows an overlapped phase transition when cooling and the phase transition is separated or overlapped according to the cooling rate. Based on wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) experiment results, intercalations of alkyl chains crosslinked by intermolecular hydrogen bonding are identified. To investigate the photo-responsibility of BP-Azo, we irradiated UV light to the BP-Azo organogel resulting that gel-sol transition to squeeze organic solvents and color change of organogel. The wringing behavior to squeeze organic solvents is resulted from the morphology change from the metastable 3D network to the stable layer structure. This work was supported by the Basic Research Laboratory Program (2020R1A4A1018259) |
