A thermally activated photoluminescence memory effect, induced by a reversible order–disorder phase transition of the alkyl chains, is reported for highly organized bilayer alkyl/siloxane hybrids (see figure; left at room temperature, right at 120 °C). The emission energy is sensitive to the annihilation/formation of the hydrogen-bonded amide–amide array displaying a unique nanoscopic sensitivity (ca. 150 nm).
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