A variety of structural analogues of purines and pyrimidines are known to affect the growth of viruses, bacteria and other micro-organisms, plants and animals. Some of these may exert their action through being incorporated into nucleic acids in place of the natural purine or pyrimidine. Such examples are: 8-azaguanine, a structural analogue of guanine, which has been shown to replace guanine i...

Tuning the electronic bandgap of graphdiyne is an efficient way to construct a type II heterojunction for photocatalysis. In article number 2100994, Mohamed Nawfal Ghazzal and co-workers demonstrate enlarging GDY via H-substitution, which promotes interfacial charge separation improves photocatalytic hydrogen evolution remarkably.