Comparison of the performance of L with other reported chemosensors.

Type of sensors	Ion sensing	Limit of detection (M)		Reference
		Colorimetrically	Fluorometrically
Aminopyridine Schiff bases based	Ni2+, Zn2+	6.96 × 10−7 and 4.17 × 10−7	—	57
	Zn2+	—	1.13 × 10−7, 2.95 × 10−7	57
Aminoantipyrine based	Zn2+	—	1.4 × 10−8	58
Octopamine-based	Zn2+	—	9.9 × 10−7	59
Benzothiazole-based	Ni2+, Zn2+	Not provided	2.50 × 10−7 and 3.0 × 10−7	60
Naphthalimide-based	Ni2+, Zn2+	—	3.3 × 10−7 and 1.8 × 10−7	61
Quinazolin-based	Ni2+, Zn2+	7.9 × 10−9 and 7.5 × 10−9	—	This work
	Zn2+	—	1.7 × 10−9 M	This work