Table 2. MIC of the Schiff base ligand L and [Ln(NO₃)₂L(H₂O)_x](NO₃) complexes against a number of bacteria (µg/mL).

Tested compounds	Gram (−) bacteria				Gram (+) bacteria
	Sd	Ps	Pv		E. coli	Sm	Kp	Sa
L	N	63	N		63	N	N	N
[DyL(NO3)2(H2O)](NO3)	250	250	125		250	N	N	N
[SmL(NO3)2](NO3)	N	250	N		250	63	N	16
[PrL(NO3)2(H2O)](NO3)	N	125	N		125	N	N	N
[NdL(NO3)2](NO3)	N	63	N		63	N	125	8
[LaL(NO3)2(H2O)](NO3)	N	63	N		125	N	125	2
[ErL(NO3)2(H2O)](NO3)	N	125	N		125	N	125	250
[GdL(NO3)2(H2O)](NO3)	N	32	N		250	N	125	16
Cephalexin	8	125	125		16	125	8	8
Cephradine	16	125	125		16	125	16	8

Sa: S. aureus; Ps: P. aeruguinosa; Sd: S. dysenteriae; Pv: P. vulgaris; Sm: S. marcescens; Kp: K. pneumonia; N: non detected. Cephalexin and Cephradine are standard antibiotics.