A biocompatible coumarinyl Schiff base scaffold (H2L), a nontoxic probe and a fluorescent sensor to Zn2+, with an LOD of 11 nM, was used for living cell imaging.
Naphthyl appended sulfonamide Schiff base (HL), an antimicrobial nontoxic agent, serves as a fluorogenic sensor to Al3+, LOD 33.2 nM and is used for living cell imaging.
The simple Schiff base (Z)-N-benzylidenenaphthalen-1-amine (L) acts as fluorescence sensor for Al3+ by “off–on” mode which is applicable in biological cells and bovine serum albumin.