A novel carbazole-based ratiometric fluorescent sensor for Zn2+ recognition through excimer formation and application of the resultant complex for colorimetric recognition of oxalate through IDAs

221A carbazole-based fluorescent sensor (L) that behaves selective recognition to Zn2+ through excimer formation has been developed. The obtained Zn2L2 complex was further applied to oxalator recognition through indicator displacement assays.