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Photolysis of a styrylpyrazine amphiphile in the bilayer of a vesicle made from its mixture with DPPC, with irradiation above 300 nm, effectively suppressed the release of glucose entrapped in the vesicle, while the stilbene analogue induced a sudden perturbation to release the glucose under the same conditions.

Styrylpyrazine amphiphile 1 in aqueous dispersion showed a remarkably slow aggregation process. Evidence supporting the “translation” layered structure of 1 having face-to-face stacking in the aggregate was obtained by the blue-shifted fluorescence spectra by the aggregation in contrast with the red-shift for stilbene amphiphile 2.

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