A bifunctional colorimetric fluorescent probe for Hg2+and Cu2+based on a carbazole–pyrimidine conjugate: chromogenic and fluorogenic recognition on TLC, silica-gel and filter paper

A bifunctional fluorescent probe based on a carbazole–pyrimidine conjugate exhibited a colorimetric and ratiometric turn-on response towards Hg²⁺/Cu²⁺in the nanomolar range.