A Heterogeneous Nanoscale Covalent Organic Framework Fluorescence Probe for Sensitive Detection of Hydrogen Sulfide
Xuan Ge, Houyong Zhang, Chengxiao Zhang, Mingyue Du
Abstract
Abstract New strategies for highly selective and sensitive detection of highly toxic environmental pollutants are still a pressing need. Here, through Cu 2+ metalated porous nanoscale covalent organic framework (NCOF), a novel heterogeneous NCOF fluorescence probe has been synthesized for sensitive and selectivity detection of hydrogen sulfide (H 2 S). Upon H 2 S addition, the Cu 2+ released from the CuCOF, accompanied by the fluorescence recovered of COF. As far as we know, NCOF has not been reported as fluorescence probe for H 2 S detection. The as‐prepared nano CuCOF displays an excellent sensitive response to H 2 S with a detection limit of 10 nM. In addition, such heterogeneous fluorescence probe exhibited high selectivity towards to H 2 S relative to other thiols and anionic species. Moreover, the detection of H 2 S was achieved successfully in different actual water samples.