26902-03-4Relevant articles and documents
Effective Utilization of NIR Wavelengths for Photo-Controlled Polymerization: Penetration Through Thick Barriers and Parallel Solar Syntheses
Wu, Zilong,Jung, Kenward,Boyer, Cyrille
, p. 2013 - 2017 (2020)
This contribution details an efficient and controlled photopolymerization regulated by far-red (λ=680 nm) and NIR (λ=780 and 850 nm) light in the presence of aluminium phthalocyanine and aluminium naphthalocyanine. Initiating radicals are generated by photosensitization of peroxides affording an effective strategy that provides controlled polymerization of a variety of monomers with excellent living characteristics. Critically, long wavelength irradiation provides penetration through thick barriers, affording unprecedented rates of controlled polymerization that can open new and exciting applications. Furthermore, a more optimized approach to performing solar syntheses is presented. By combining the narrow Q-bands of these photocatalysts with others possessing complementary absorptions, layered, independent polymerizations and organic transformations may be performed in parallel under a single broadband emission source, such as sunlight.
Metal-free photocatalytic thiol-ene/thiol-yne reactions
Kaur, Sarbjeet,Zhao, Gaoyuan,Busch, Evan,Wang, Ting
supporting information, p. 1955 - 1961 (2019/02/20)
The organic photocatalyst (9-mesityl-10-methylacridinum tetrafluoroborate) in the presence of visible light is used to initiate thiol-ene and thiol-yne reactions. Thiyl radicals are generated upon quenching the photoexcited catalyst with a range of thiols
Photoinitiated Thiol-Ene “Click” Reaction: An Organocatalytic Alternative
Limnios, Dimitris,Kokotos, Christoforos G.
supporting information, p. 323 - 328 (2017/02/05)
The thiol-ene coupling (TEC) reaction has attracted a lot of scientific attention during the last years, particularly in the fields of polymers, materials and more recently in drug design. The combination of organocatalysis and photocatalysis has enabled the development of an efficient synergistic protocol for the addition of various thiols to a plethora of olefins. Utilizing phenylglyoxylic acid as the catalyst-initiator and common household bulbs as the light source, we report an organocatalytic photoinitiated TEC reaction showing exceptional tolerance in the presence of various functionalities, untangling previously unsolved problems. (Figure presented.).