Hydrogen bond dynamics governs the effective photoprotection mechanism of plant phenolic sunscreens

Hydrogen bond dynamics governs the effective photoprotection mechanism of plant phenolic sunscreens
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氢键动力学控制植物酚类防晒剂的有效光保护机制

DOI:
10.1039/c6pp00367b
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发表时间:
2017-02
影响因子:
3.1
通讯作者:
Gao Jun
Gao Jun
中科院分区:
化学3区
文献类型:
--
作者:
Liu Fang;Du Likai;Lan Zhenggang;Gao Jun

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芥子酸衍生物是天然植物中重要的防晒物质,可以提供对太阳紫外线辐射的防护。使用超快激发态动力学的组合,再加上经典的分子动力学研究,我们证明,有直接耦合的氢键运动与激发态光保护动力学的一部分,在解决方案中的基本机制。除了分子内的自由度之外,所有时间尺度上的分子间运动对于从超快氢键运动到溶剂重排的光化学或光物理事件都是潜在重要的。这不仅提供了一个增强的理解异常的实验光谱结果,但也在防晒剂的光化学性能改善的发展的关键思想。我们认为,氢键动力学耦合激发态光保护机制也可能在广泛的生物相关分子的凝聚相。
Sinapic acid derivatives are important sunscreen species in natural plants, which could provide protection from solar UV radiation. Using a combination of ultrafast excited state dynamics, together with classical molecular dynamics studies, we demonstrate that there is direct coupling of hydrogen bond motion with excited state photoprotection dynamics as part of the basic mechanism in solution. Beyond the intra-molecular degree of freedom, the inter-molecular motions on all timescales are potentially important for the photochemical or photophysical events, ranging from the ultrafast hydrogen bond motion to solvent rearrangements. This provides not only an enhanced understanding of the anomalous experimental spectroscopic results, but also the key idea in the development of sunscreen agents with improved photo-chemical properties. We suggest that the hydrogen bond dynamics coupled excited state photoprotection mechanism may also be possible in a broad range of bio-related molecules in the condensed phase.
DOI: 10.1021/acs.jpclett.5b00203
发表时间: 2015-04
期刊: The journal of physical chemistry letters
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