Novel Gallium(III), Germanium(IV), and Hafnium(IV) Folate Complexes and Their Spectroscopic, Thermal Decomposition, Morphological, and Biological Characteristics

Table 6

Antimicrobial assessments of Ga(III), Ge(IV), and Hf(IV) folate complexes.

Sample		Inhibition zone diameter (mm/mg sample)
		Bacillus subtilis (G^+)	Escherichia coli (G^−)	Pseudomonas aeruginosa (G^−)	Staphylococcus aureus (G^+)	Aspergillus flavus (fungus)	Candida albicans (fungus)
Control: DMSO		0.0	0.0	0.0	0.0	0.0	0.0
Standard	Tetracycline antibacterial agent	34	32	34	30	—	—
	Amphotericin B antifungal agent	—	—	—	—	18	19
FAH2		16	19	17	13	2	5
Ga(III) complex		29	12	13	23	7.0	16
Ge(IV) complex		20	11	16	29	2.0	12
Hf(IV) complex		30	19	10	14	11	20

G : gram reaction. Solvent: DMSO.