“…A first approach for storing fragrances in materials is to entrap them in nano- or microcapsules of polymers − or silica nanocapsules. , However, fragrances are diffusing rapidly through these carriers, with typically ∼30–50% − of fragrance released after 1 week. Another approach for retarding and controlling the release of fragrance is to link the fragrance molecule to macromolecules via light-, , enzyme-, ,, and acid-labile linkages. − Activation by light can potentially cause the premature degradation the fragrance from the polymer or an unwanted release .…”