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Effective Utilization of NIR Wavelengths for Photo‐Controlled Polymerization: Penetration Through Thick Barriers and Parallel Solar Syntheses
Author(s) -
Wu Zilong,
Jung Kenward,
Boyer Cyrille
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201912484
Subject(s) - polymerization , photopolymer , monomer , materials science , photochemistry , phthalocyanine , irradiation , wavelength , penetration (warfare) , chemical engineering , penetration depth , nanotechnology , optoelectronics , chemistry , optics , polymer , composite material , operations research , physics , nuclear physics , engineering
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.