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首页> 美国卫生研究院文献>Proceedings. Mathematical Physical and Engineering Sciences >Photophysics of sunscreen molecules in the gas phase: a stepwise approach towards understanding and developing next-generation sunscreens
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Photophysics of sunscreen molecules in the gas phase: a stepwise approach towards understanding and developing next-generation sunscreens

机译：气相中防晒剂分子的光物理：逐步理解和开发下一代防晒剂的方法

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摘要

The relationship between exposure to ultraviolet (UV) radiation and skin cancer urges the need for extra photoprotection, which is presently provided by widespread commercially available sunscreen lotions. Apart from having a large absorption cross section in the UVA and UVB regions of the electromagnetic spectrum, the chemical absorbers in these photoprotective products should also be able to dissipate the excess energy in a safe way, i.e. without releasing photoproducts or inducing any further, harmful, photochemistry. While sunscreens are tested for both their photoprotective capability and dermatological compatibility, phenomena occurring at the molecular level upon absorption of UV radiation are largely overlooked. To date, there is only a limited amount of information regarding the photochemistry and photophysics of these sunscreen molecules. However, a thorough understanding of the intrinsic mechanisms by which popular sunscreen molecular constituents dissipate excess energy has the potential to aid in the design of more efficient, safer sunscreens. In this review, we explore the potential of using gas-phase frequency- and time-resolved spectroscopies in an effort to better understand the photoinduced excited-state dynamics, or photodynamics, of sunscreen molecules. Complementary computational studies are also briefly discussed. Finally, the future outlook of expanding these gas-phase studies into the solution phase is considered.
机译：紫外线（UV）辐射与皮肤癌之间的关系促使人们需要额外的光保护作用，目前，这种保护作用是由广泛可商购的防晒乳液提供的。除了在电磁光谱的UVA和UVB区域具有较大的吸收截面外，这些光防护产品中的化学吸收剂还应该能够以安全的方式消散多余的能量，即不会释放光产品或引起任何其他有害的影响，光化学。尽管对防晒剂的光保护能力和皮肤相容性进行了测试，但很大程度上忽略了在吸收紫外线辐射后在分子水平上发生的现象。迄今为止，关于这些防晒分子的光化学和光物理的信息非常有限。但是，对流行的防晒剂分子成分消散过多能量的内在机理的透彻了解可能有助于设计更有效，更安全的防晒剂。在这篇综述中，我们探索了使用气相频率和时间分辨光谱仪的潜力，以便更好地了解防晒剂分子的光致激发态动力学或光动力学。补充计算研究也作了简要讨论。最后，考虑了将这些气相研究扩展到溶液相的未来前景。

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