Lanthanide Complexes of Substituted 𝜷-Diketone Hydrazone Derivatives: Synthesis, Characterization, and Biological Activities

Table 8

Antimicrobial activity data for the complexes*.

Complex	B. subtilis	S. aureus	E. coli	S. typhi	A. niger	C. albicans
Sc-L1	15	7	10	6	+	++
Ce-L1	9	—	7	—	+	+
Sc-L2	10	6	6	11	++	++
Y-L4	7	7	7	7	+	+
Ce-L4	6	—	7	6	+	++
Y-L5	10	7	6	8	—	+
Sc-L7	11	10	10	12	+	+
La-L7	6	—	—	6	—	—
Y-L8	6	8	8	8	+	+
La-L8	6	7	6	6	+	—
Sc-L9	12	11	12	12	+	+
Y-L9	14	9	13	9	+	+
La-L9	6	—	—	—	+	+
Ce-L9	7	6	6	6	+	+
Sc-L12	17	10	10	15	++	+++
Y-L12	11	11	10	8	+	++
La-L12	11	7	7	—	—	++
Ce-L12	12	9	10	7	++	+++
Ampicillin	18	16	15	14	—	—
Tetracycline	16	15	17	17	—	—
Salicylic Acid	—	—	—	—	++++	++++

*Inhibition zone diameter (% inhibition): +, 6–9 mm (33–50%); ++, 10–12 mm (55–67%); +++, 13–15 mm (72–83%); ++++, 16–18 mm (89–100%).
Percentage inhibition values were relative to inhibition zone (18 mm) with 100% inhibition.