| 초록 |
Molecular switching between cis and trans-forms in mono- and multilayer systemscontaining azobenzene is of particular interest in physics, chemistry and electronics. Recently,much attention has been paid to the artificial lipid membranes containing azobenzenederivatives as a model of visual light processing because of their similarity to biologicalmembranes. The azobenzene derivatives undergo reversible cis-trans photoisomerization in theartificial membranes, because the condensation of pure azobenzene monolayers is loosened byhe introduction of phospholipids into the monolayers, and the molecular aggregation in pureazobenzene monolayers is also weakened by the introduction of phospholipids. Therefore it ispossible to generate transient displacement current pulses across phospholipid monolayersmixed with azobenzenes, due to the cis-trans photoisomerization of azobenzene by alternatingirradiation of ultraviolet and visible light. As mentioned above, the introduction ofphospholipids into pure azobenzene monolayers is very effective in the photoisomerization ofazobenzene monolayers. In the present paper, we applied the Maxwell displacement current measuring method toexamine the generation of MDC due to the cis-trans photoisomerization in phospholipid-fattyacid containing azobenzene mixed monolayer systems on a water surface. It was found thatthe introduction of DLPC molecules into a pure azobenzene monolayer gives a direct effecton the generation of displacement current due to cis-trans photoisomerization.
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