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• W2101032494 abstract "A new UV filter, the 1-(4-tert-butylphenyl)-2-decanyl-3-(4′-methoxyphenyl)-propane-1,3-dione, called C10-DBM, was prepared by grafting a 10-carbon aliphatic chain to the α-carbonyl position of 4-tert-butyl-4′-methoxydibenzoylmethane (BM-DBM), a well-known and often used UV filter. The UV-A absorption efficiency of organic solutions containing the new filter was tested and compared with identical solutions containing BM-DBM with or without irradiation (xenon lamp). The originality of this new filter is that its UV-A absorbance appeared during irradiation of the molecule. Although the molar absorption coefficient of C10-DBM in the UV-A domain was lower than that of BM-DBM, the solutions absorption exhibited a much more photostable behavior under irradiation. In this study, we first demonstrated that C10-DBM was a precursor of BM-DBM (enol isomer) by means of high-performance liquid chromatography followed by mass spectrometry. Indeed, we showed that the UV-A absorption of C10-DBM solutions appearing during the irradiation of the molecule was due to a Norrish-II reaction (β-cleavage), which induced the release of the BM-DBM enol form and 1-decene. Then, we established a kinetic model for the photochemistry of C10-DBM and fitted the variation of UV absorption spectra to confirm the proposed mechanism." @default.
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• W2101032494 date "2004-01-01" @default.
• W2101032494 modified "2023-10-16" @default.
• W2101032494 title "Photochemical Behavior of a New Long-chain UV Absorber† Derived from 4-tert-Butyl-4′-Methoxydibenzoylmethane¶" @default.
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• W2101032494 doi "https://doi.org/10.1562/2004-03-09-ra-106.1" @default.
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