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Electron Deficient Monomers that Optimize Nucleation and Enhance the Photocatalytic Redox Activity of Carbon Nitrides
Author(s) -
Zhang Guigang,
Liu Minghui,
Heil Tobias,
Zafeiratos Spiros,
Savateev Aleksandr,
Antonietti Markus,
Wang Xinchen
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201908322
Subject(s) - monomer , redox , photocatalysis , chemistry , polymerization , nitride , cyanamide , carbon nitride , tetrazole , photochemistry , carbon fibers , homo/lumo , materials science , inorganic chemistry , organic chemistry , catalysis , molecule , polymer , layer (electronics) , composite number , composite material
Polymeric carbon nitride (PCN) is usually synthesized from nitrogen‐rich monomers such as cyanamide, melamine, and urea, but is rather disordered in many cases. Now, a new allotrope of carbon nitride with internal heterostructures was obtained by co‐condensation of very electron poor monomers (for example, 5‐amino‐tetrazole and nucleobases) in the presence of mild molten salts (for example, NaCl/KCl) to mediate the polymerization kinetics and thus modulate the local structure, charge carrier properties, and most importantly the HOMO and LUMO levels. Results reveal that the as‐prepared NaK‐PHI‐A material shows excellent photo‐redox activities because of a nanometric hetero‐structure which enhances visible light absorption and promotes charge separation in the different domains.