Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 60, Pages 14981-14988Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202102689
Keywords
anodic aluminum oxides; conducting materials; photoresponsive; polymers; spiropyran
Categories
Funding
- Ministry of Science and Technology, Taiwan [MOST 108-2221-E-009 -133 -MY3] Funding Source: Medline
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This study demonstrates photoresponsive composite polymer electrolytes by combining gel polymer electrolyte with spiropyran-immobilized nanoporous anodic aluminum oxide templates. The polarization of AAO surfaces is controlled by UV and visible light irradiation, and the electrostatic interactions between ions and AAO surfaces are investigated. The behavior of ionic conductivity is found to be consistent with the kinetics of isomerization.
Composite polymer electrolytes (CPEs) with smart, stimuli-responsive characteristics have gained considerable attention owing to their noninvasive manipulation and applications in future technologies. To address this potential, in this work, we demonstrate photoresponsive composite polymer electrolytes, consisting of gel polymer electrolyte (GPE) and spiropyran-immobilized nanoporous anodic aluminum oxide (SP-AAO) templates. Under UV irradiation, the close SP form isomerizes to the open merocyanine (MC) form, creating extremely polarized AAO surfaces; whereas, under visible light irradiation, the MC form reverts to the SP form, creating neutral surface conditions. The electrostatic interactions between ions and AAO surfaces are investigated by attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy. Moreover, the behavior of ionic conductivity of the GPE@SP-AAO is found to be consistent with the kinetics of isomerization tracked by UV-Vis spectroscopy. This work provides a promising platform for developing next-generation photoelectronic smart devices.
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