A “turn-on” fluorescent sensor for cytosine in aqueous media was prepared.
We present a low background, highly selective and amplified fluorescent sensor for Hg2+ using graphene oxide and Exo III.
A new fluorescent sensor 5 having fused imidazopyridine scaffold has been synthesized via cascade cyclization. It exhibits highly sensitive and selective detection of Fe3+ (‘turn-on’) and Hg2+ (‘turn-off’) in vitro and in HeLa cells.