Covalent organic frameworks (COFs) are a class of porous crystalline polymers assembled by stitching together organic units, through the formation of covalent bonds, to form an extended framework ...
2 + 2 Photocycloadditions are idealized, convergent construction approaches of 4-membered heterocyclic rings, including azetidines. However, methods of direct excitation are limited by the unfavorable ...
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