Hydrogen bonds (H-bonds) formed between nucleobases play an important role in the construction of various nucleic acid structures. The H-donor and H-acceptor pattern of a nucleobase is responsible for selective and correct base pair formation. Herein, we describe an 8-thioadenine nucleobaseanalogue and an 8-thiohypoxanthine nucleobaseanalogue with a photolabile 6-nitroveratryl (NV) group on the sulfur