Reversible luminescence switching of a photochromic fullerene[60]-containing spiropyranстатья

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Дата последнего поиска статьи во внешних источниках: 20 мая 2019 г.

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[1] Reversible luminescence switching of a photochromic fullerene[60]-containing spiropyran / D. I. Galimov, A. R. Tuktarov, D. S. Sabirov et al. // Journal of Photochemistry and Photobiology A: Chemistry. — 2019. — Vol. 375. — P. 64–70. Molecular switch is a widespread concept of molecular machinery. It consists on creating the molecules, which are able to exist in two stable states with significantly different physicochemical properties. Spiropyrans are widely used for this purpose as they readily undergo photoisomerization and reveal suitable spectral parameters to monitor the switch. Novel photo-switchable spiropyrans can be obtained by their linking with fullerene[60], a well-known electron acceptor with a unique π-electronic system. In the present work, we have synthesized such a hybrid fullerene-containing spiropyran and studied its switching with UV–vis and luminescent spectroscopies. We have found that the photo-impact induces the transit of the C60-spiropyran molecular system from its closed form to the open one. This switch is accompanied with a significant increase in the intensity of luminescence. The measured quantum yield of the photoluminescence of the open form of the C60-spiropyran adduct is high (ϕPL = 0.09), so it has a record luminescent properties among the mono-adducts of the C60 fullerene with typical ϕPL values lower than 0.001. The outstanding properties of the fullerene-spiropyran adducts may be further used in molecular devices and systems of three-dimensional memory. [ DOI ]

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