scholarly journals Photochemistry and Radical Chemistry under Low Intensity Visible Light Sources: Application to Photopolymerization Reactions

Molecules ◽  
2014 ◽  
Vol 19 (9) ◽  
pp. 15026-15041 ◽  
Author(s):  
Jacques Lalevée ◽  
Fabrice Morlet-Savary ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Jean-Pierre Fouassier
Keyword(s):  
Visible Light ◽  
Light Sources ◽  
Radical Chemistry ◽  
Low Intensity

New versatile bimolecular photoinitiating systems based on amino-m-terphenyl derivatives for cationic, free-radical and thiol–ene photopolymerization under low intensity UV-A and visible light sources

2020 ◽  
Vol 11 (2) ◽  
pp. 480-495 ◽  
Author(s):  
Emilia Hola ◽  
Maciej Pilch ◽  
Mariusz Galek ◽  
Joanna Ortyl
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Light Sources ◽  
Low Intensity ◽  
Diphenyliodonium Salt

The performance of a series of 2-amino-4,6-diphenyl-benzene-1,3-dicarbonitrile derivatives as visible light sensitizers for diphenyliodonium salt for enabling photopolymerization at different irradiation wavelengths was studied.

scholarly journals Free Radical Chemistry Enabled by Visible Light-Induced Electron Transfer

2016 ◽  
Vol 49 (10) ◽  
pp. 2295-2306 ◽  
Author(s):  
Daryl Staveness ◽  
Irene Bosque ◽  
Corey R. J. Stephenson
Keyword(s):  
Electron Transfer ◽  
Free Radical ◽  
Visible Light ◽  
Radical Chemistry ◽  
Free Radical Chemistry

scholarly journals A perspective on high photon flux nonclassical light and applications in nonlinear optics

2020 ◽  
Vol 8 ◽  
Author(s):  
Th. Lamprou ◽  
I. Liontos ◽  
N. C. Papadakis ◽  
P. Tzallas
Keyword(s):  
Nonlinear Optics ◽  
Quantum Optics ◽  
Vital Role ◽  
Photon Flux ◽  
Light Sources ◽  
Future Prospects ◽  
Nonclassical Light ◽  
Low Intensity ◽  
High Photon Flux ◽  
Quantum Technology

Abstract Nonclassical light sources have a vital role in quantum optics as they offer a unique resource for studies in quantum technology. However, their applicability is restricted by their low intensity, while the development of new schemes producing intense nonclassical light is a challenging task. In this perspective article, we discuss potential schemes that could be used towards the development of high photon flux nonclassical light sources and their future prospects in nonlinear optics.

scholarly journals Evaluation of Aircrew Low-Intensity Threat Laser Eye Protection

2019 ◽  
Vol 184 (Supplement_1) ◽  
pp. 593-603 ◽  
Author(s):  
Michael D Reddix ◽  
Matthew E Funke ◽  
Micah J Kinney ◽  
John L Bradley ◽  
Greg Irvin ◽  
...  
Keyword(s):  
Reaction Time ◽  
Color Vision ◽  
Repeated Measures ◽  
Reaction Time Task ◽  
Coast Guard ◽  
Night Vision ◽  
Light Sources ◽  
Eye Protection ◽  
Low Intensity ◽  
Color Symbol

Abstract Prototype low-intensity threat laser eye protection (LIT-LEP) spectacles were evaluated for US Coast Guard (USCG) cockpits and night vision goggle compatibility. The impetus for interest in aviation LIT-LEP is driven in part by the fact that easily accessible 0.5–2.0 W high-power laser pointers exceed safety standards for direct on-axis viewing. A repeated-measures experimental design was used to assess LIT-LEP performance relative to a no-LEP control for the following tasks: Near- and far contrast acuity, night vision goggle far-contrast acuity, emissive and non-emissive light source color-vision screening, and USCG multifunctional display color symbol discrimination reaction time and accuracy. Near- and far-contrast acuity results demonstrated good LIT-LEP performance for typical in- and out-of-cockpit lighting conditions. Night vision goggle performance suffered marginally at only one contrast level (85%; 20/30 acuity line). Color vision test results showed good color balance in that S-, M-, and L-cone performance did not demonstrate a clinical diagnostic color defect for emissive or non-emissive light sources when wearing LIT-LEP. Color symbol discrimination reaction-time-task results based on inverse efficiency scores revealed that some non-primary flight display colors exhibited a combination of slower speed and decreased accuracy. The findings will contribute to an acquisition decision as well as guide future LEP designs.

scholarly journals Visible-Light Photoswitching of G-Quadruplex Ligand Binding Mode Allows Reversible Control of G-Tetrad Structure

2020 ◽  
Author(s):  
Michael O'Hagan ◽  
Javier Ramos Soriano ◽  
Susanta Haldar ◽  
Juan Carlos Morales ◽  
Adrian Mulholland ◽  
...  
Keyword(s):  
Ligand Binding ◽  
Visible Light ◽  
Uv Light ◽  
Binding Mode ◽  
High Energy ◽  
Light Sources ◽  
Biologically Relevant ◽  
G Quadruplex ◽  
Potential Applications ◽  
Robust Regulation

<div><p>Photoresponsive ligands for G-quadruplex oligonucleotides (G4) offer exciting opportunities for the reversible regulation of these assemblies with potential applications in biological chemistry and responsive nanotechnology. However, achieving the robust regulation of G4 ligand activity with low-energy visible light sources that are easily accessible and compatible with biological systems remains a significant challenge to realizing these applications. Herein, we report the G4-binding properties of a photoresponsive dithienylethene (DTE). We demonstrate the first example of G4-specific acceleration of the photoswitching kinetics of a small molecule and the visible-light mediated switching of the G4 ligand binding mode in physiologically-relevant conditions, which in turn allows control over the G4 tetrad structure of telomeric G4 in potassium buffer. The process is fully reversible and avoids the need for high-energy UV light. This affords an efficient, practical and biologically-relevant means of control that may be applied in the generation of new responsive G4/ligand supramolecular systems.</p></div><br>

scholarly journals Recent advances in visible-light-driven organic reactions

2017 ◽  
Vol 4 (3) ◽  
pp. 359-380 ◽  
Author(s):  
Qiang Liu ◽  
Li-Zhu Wu
Keyword(s):  
Visible Light ◽  
Aerobic Oxidation ◽  
Environmental Benefits ◽  
Organic Reactions ◽  
Light Sources ◽  
Recent Advances ◽  
Visible Light Driven ◽  
Hydrogen Evolution Reactions ◽  
Green Chemical Synthesis ◽  
Powerful Strategy

Abstract In recent years, visible-light-driven organic reactions have been experiencing a significant renaissance in response to topical interest in environmentally friendly green chemical synthesis. The transformations using inexpensive, readily available visible-light sources have come to the forefront in organic chemistry as a powerful strategy for the activation of small molecules. In this review, we focus on recent advances in the development of visible-light-driven organic reactions, including aerobic oxidation, hydrogen-evolution reactions, energy-transfer reactions and asymmetric reactions. These key research topics represent a promising strategy towards the development of practical, scalable industrial processes with great environmental benefits.

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