The Influence Of The Solvent On Schiff Base Ligand L, Co (2) Complex?

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3.7.1. Effect of solvent and pH

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 2.010.0. 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
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An octahedral geometry was proposed for all complexes as shown in Scheme 4. Kinetic and thermodynamic parameters were computed using Coats and Redfern method. Fluorescence studies indicated that the Schiff base ligand and its metal(II) complexes can serve as potential photoactive materials as indicated from their characteristic fluorescence properties and study the effect of solvent and pH on it. All the complexes catalyzed the decomposition of H2O2. In case of varying concentration of H2O2, the catalytic activity increases by increasing the concentration of H2O2. The catalytic activity of the complexes were also checked by varying the amount of catalyst. Here also the catalytic activity increases by increasing the amount of …show more content…
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