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Rod‐Cell‐Mimetic Photochromic Layered Ion Channels with Multiple Switchable States for Controllable Ion Transport
Author(s) -
Xiao Tianliang,
Ma Jing,
Jiang Jiaqiao,
Gan Mengke,
Lu Bingxin,
Luo Rifeng,
Liu Qingqing,
Zhang Qianqian,
Liu Zhaoyue,
Zhai Jin
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201902450
Subject(s) - photochromism , spiropyran , ion , materials science , merocyanine , stacking , ion transporter , nanoporous , ion channel , photochemistry , photoisomerization , optoelectronics , nanotechnology , chemical physics , chemistry , organic chemistry , isomerization , biochemistry , receptor , catalysis
The controllable ion transport in the photoreceptors of rod cells is essentially important for the light detection and information transduction in visual systems. Herein, inspired by the photochromism‐regulated ion transport in rod cells with stacking structure, layered ion channels have been developed with a visual photochromic function induced by the alternate irradiation with visible and UV light. The layered structure is formed by stacking spiropyran‐modified montmorillonite 2D nanosheets on the surface of an alumina nanoporous membrane. The visual photochromism resulting from the photoisomerization of spiropyran chromophores reversibly regulates the ion transport through layered ion channels. Furthermore, the cooperation of photochromism and pH value achieves multiple switchable states of layered ion channels for the controllable ion transport mimicking the biological process of the visual cycle. The ion transport properties of these states are explained quantitatively by a theoretical calculation based on the Poisson and Nernst–Plank (PNP) equations.