Coumarine based Cu(II) complex as chemosensor for selective detection of l-threonine and l-asparagine

A fast survey on recent developments in designing colorimetric and fluorescent sensors for the selective detection of essential amino acids

“…22). 38 With the addition of L-Thr to 29, there was a decrease in the absorption bands at 253 nm and 335 nm and a drastic decrease in the uorescence intensity of 29 at 501 nm. Thus, ligand 29 shows uorescence "on-off" behavior in the presence of L-Thr.…”