PHOTOINDUCED ION PERMEATION THROUGH TERNARY COMPOSITE MEMBRANE COMPOSED OF POLYMER/LIQUID CRYSTAL/AZOBENZENE-BRIDGED CROWN ETHER

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Abstract
Azobenzene-bridged crown ether(AZO-CR) in the ternary composite membrane exhibits trans–cis photoisomerization by irradiation of ultraviolet and visible lights. The K+ ion permeation through the ternary composite membrane is facilitated by photoirradiation. The facilitated transport of K+ ion is in strong relation to an altered affinity of AZO-CR for K+ ion due to the trans–cis configurational change of AZO-CR induced by photoirradiation. The cation permeation is remarkably influenced by the magnitude of solubility of counter-anion to the composite membrane.