Structure-Property Relationships of Core-Substituted Diaryl Dihydrophenazine Organic Photoredox Catalysts and their Application in O-ATRP

2021 ◽  
Author(s):  
Mariel Jene Price ◽  
Katrina Puffer ◽  
Max Kudisch ◽  
Declan Knies ◽  
Garret Miyake
Keyword(s):  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Low Energy ◽  
Atom Transfer ◽  
Structure Property ◽  
Structure Property Relationships

Photoinduced organocatalyzed atom-transfer radical polymerization (O-ATRP) is a controlled radical polymerization technique that can be driven using low-energy, visible light and makes use of organic photocatalysts. Limitations of O-ATRP have...

Biomimetic controlled radical photopolymerization in a two-dimensional organized environment under visible light

2021 ◽  
Vol 57 (81) ◽  
pp. 10612-10615
Author(s):  
Sergey A. Dergunov
Keyword(s):  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Active Role ◽  
Atom Transfer ◽  
Two Dimensional ◽  
Aqueous Conditions

The vesicle bilayer functions as a confined organized environment for the rapid photoinduced atom transfer radical polymerization (photoATRP) of methacrylates under benign aqueous conditions, where accommodation of the monomers plays an active role.

Photoinduced Atom Transfer Radical Polymerization with ppm-Level Cu Catalyst by Visible Light in Aqueous Media

2015 ◽  
Vol 137 (49) ◽  
pp. 15430-15433 ◽  
Author(s):  
Xiangcheng Pan ◽  
Nikhil Malhotra ◽  
Antonina Simakova ◽  
Zongyu Wang ◽  
Dominik Konkolewicz ◽  
...  
Keyword(s):  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Aqueous Media ◽  
Atom Transfer ◽  
Cu Catalyst ◽  
Ppm Level

scholarly journals Towards low-energy-light-driven bistable photoswitches: ortho-fluoroaminoazobenzenes

2021 ◽  
Author(s):  
Kim Kuntze ◽  
Jani Viljakka ◽  
Evgenii Titov ◽  
Zafar Ahmed ◽  
Elina Kalenius ◽  
...  
Keyword(s):  
Visible Light ◽  
Excited States ◽  
Quantum Chemical ◽  
Low Energy ◽  
Living Systems ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Thermal Stability Of ◽  
Insight Into ◽  
Cis Isomer

Abstract Thermally stable photoswitches that are driven with low-energy light are rare, yet crucial for extending the applicability of photoresponsive molecules and materials towards, e.g., living systems. Combined ortho-fluorination and -amination couples high visible-light absorptivity of o-aminoazobenzenes with the extraordinary bistability of o-fluoroazobenzenes. Herein, we report a library of easily accessible o-aminofluoroazobenzenes and establish structure–property relationships regarding spectral qualities, visible light isomerization efficiency and thermal stability of the cis-isomer with respect to the degree of o-substitution and choice of amino substituent. We rationalize the experimental results with quantum chemical calculations, revealing the nature of low-lying excited states and providing insight into thermal isomerization. The synthesized azobenzenes absorb at up to 600 nm and their thermal cis-lifetimes range from milliseconds to months. The most unique example can be driven from trans to cis with any wavelength from UV up to 595 nm, while still exhibiting a thermal cis-lifetime of 81 days.

scholarly journals Simple Benchtop Approach to Polymer Brush Nanostructures Using Visible-Light-Mediated Metal-Free Atom Transfer Radical Polymerization

2016 ◽  
Vol 5 (2) ◽  
pp. 258-262 ◽  
Author(s):  
Emre H. Discekici ◽  
Christian W. Pester ◽  
Nicolas J. Treat ◽  
Jimmy Lawrence ◽  
Kaila M. Mattson ◽  
...  
Keyword(s):  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Brush ◽  
Free Atom ◽  
Atom Transfer ◽  
Metal Free
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