The influence of the solvent on Schiff base ligand L and its metal(II) complexes were studied. The results showed that the optimal solvent for Schiff base ligand L, Co(II), Ni(II) and Cu(II) complexes were CH3CN at λemi =320, 310, 316 and 330 nm, while the optimal solvent for Mn(II) complex was DMF λemi = 312 nm, as shown in Figure 7. The effect pH on the fluorescence intensity of Schiff base ligand L and its metal(II) complexes were investigated between the pH range of 2.010.0. The influence of pH on Schiff base ligand L, Mn(II), Co(II), Ni(II) and Cu(II) complex were investigated in both acidic and alkaline media by the addition of dilute HCl and NH4OH. The optimum signals were recorded in strongly …show more content…
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