Exploring the Photochemistry of an Ethyl Sinapate Dimer: An Attempt Toward a Better Ultraviolet Filter
Exploring the Photochemistry of an Ethyl Sinapate Dimer: An Attempt Toward a Better Ultraviolet Filter
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DOI：
10.3389/fchem.2020.00633
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发表时间：
2020-07-28
影响因子：
5.5
通讯作者：
Stavros, Vasilios G.
中科院分区：
文献类型：
--
作者：
Horbury, Michael D.;Turner, Matthew A. P.;Stavros, Vasilios G.
潜在的紫外线（UV）辐射过滤器，脱氢二乙基芥子酸，在UVA区域具有广泛的吸收，探索利用飞秒时间分辨光谱和稳态辐照研究相结合的光化学和光稳定性。时间分辨的测量结果表明，这种UV过滤器候选人经历了激发态弛豫后的UV吸收的时间尺度上类似于10皮秒，这表明有效的松弛。然而，稳态辐照测量显示在长时间紫外线照射下降解。从光化学的角度来看，这突出了在设计新的潜在紫外线过滤器时考虑超快和“超低”时间尺度的重要性。
The photochemistry and photostability of a potential ultraviolet (UV) radiation filter, dehydrodiethylsinapate, with a broad absorption in the UVA region, is explored utilizing a combination of femtosecond time-resolved spectroscopy and steady-state irradiation studies. The time-resolved measurements show that this UV filter candidate undergoes excited state relaxation after UV absorption on a timescale of similar to 10 picoseconds, suggesting efficient relaxation. However, steady-state irradiation measurements show degradation under prolonged UV exposure. From a photochemical standpoint, this highlights the importance of considering both the ultrafast and "ultraslow" timescales when designing new potential UV filters.