Table 4. Antimicrobial Properties of the Ligand and Cu(II) Complexes^a.

	zone inhibition diameter (mm)
	Gram-positive bacteria	Gram-negative bacteria
compounds (50 μg/mL)	S. aureus	E. coli	P. aeruginosa
IQL	7.47 ± 0.41	7.33 ± 0.47	7.67 ± 0.47
CuL	8.67 ± 0.47	8.04 ± 0.82	9.01 ± 0.82
CuL2	8.33 ± 0.47	7.33 ± 0.47	7.67 ± 0.47
gentamycin (Pos)	18.33 ± 0.47	17.06 ± 0.10	17.67 ± 0.47
DMSO (Neg)	ND	ND	ND

^aPos = positive control, Neg = negative control, ND = not detected.