scholarly journals Illuminating the Effect of the Local Environment on the Performance of Organic Sunscreens: Insights From Laser Spectroscopy of Isolated Molecules and Complexes

2022 ◽  
Vol 9 ◽  
Author(s):  
Natalie G. K. Wong ◽  
Caroline E. H. Dessent

Sunscreens are essential for protecting the skin from UV radiation, but significant questions remain about the fundamental molecular-level processes by which they operate. In this mini review, we provide an overview of recent advanced laser spectroscopic studies that have probed how the local, chemical environment of an organic sunscreen affects its performance. We highlight experiments where UV laser spectroscopy has been performed on isolated gas-phase sunscreen molecules and complexes. These experiments reveal how pH, alkali metal cation binding, and solvation perturb the geometric and hence electronic structures of sunscreen molecules, and hence their non-radiative decay pathways. A better understanding of how these interactions impact on the performance of individual sunscreens will inform the rational design of future sunscreens and their optimum formulations.

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mikkel Herzberg ◽  
Anders Støttrup Larsen ◽  
Tue Hassenkam ◽  
Anders Østergaard Madsen ◽  
Jukka Rantanen

Solvents can dramatically affect molecular crystals. Obtaining favorable properties for these crystals requires rational design based on molecular level understanding of the solid-solution interface. Here we show how atomic force...


2009 ◽  
Vol 12 (1-3) ◽  
pp. 93-99 ◽  
Author(s):  
Sulagna De ◽  
Sk. Musharaf Ali ◽  
M.R.K. Shenoi ◽  
Sandip K. Ghosh ◽  
Dilip K. Maity

Author(s):  
Rodrigo E. Teixeira ◽  
Richard S. Graham

The visco-elastic properties of entangled polymer liquids arise from molecular-scale topological interactions and stochastic fluctuations under flow. Here, the evolutions of individual entangled polymers were observed in rheologically relevant shear flow histories. We uncover a high degree of molecular individualism and broad conformational distributions resulting from incessant stretch-collapse cycles. The data and insights of the present study may lead to improved molecular-level models and constitutive equations. These tools, in turn, may enable the rational design of novel materials with properties tailored to accomplish specific tasks such as high-pressure vessels and piping with greater safety margins and cost-effectiveness.


Author(s):  
Ziyang Zhang ◽  
Geoffrey A Tompsett ◽  
Christopher Lambert ◽  
Sergio Granados-Focil ◽  
Michael T. Timko

Solid-acid catalysts functionalized with catalytic groups have attracted intense interests for hydrolyzing cellulose into fermentable compounds. However, the solid-acid catalysts design has been guided by molecular level of interactions and...


1979 ◽  
Vol 101 (17) ◽  
pp. 5046-5053 ◽  
Author(s):  
John H. Dawson ◽  
David M. Dooley ◽  
R. Clark ◽  
Philip J. Stephens ◽  
Harry B. Gray

Biochemistry ◽  
2014 ◽  
Vol 53 (50) ◽  
pp. 7969-7982 ◽  
Author(s):  
Ivan G. Pallares ◽  
Theodore C. Moore ◽  
Jorge C. Escalante-Semerena ◽  
Thomas C. Brunold

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