Investigation Micellar Catalysis of p-Nitrophenyl Acetate Hydrolysis with Mn(Niten)2H₂O Complex

Abstract

In this article, a mononuclear Mn(Niten)2H₂O complex was prepared to catalyze hydrolysis of p-nitrophenyl acetate (PNPA) in presence of Cetyltrimethylammonium bromide (CTAB) micellar system in different pH range from 6.5–10 at 25°C. These results obtained indicate that the complex exhibits good catalytic function. It also appears the complex accelerates the hydrolytic cleavage of PNPA in cationic CTAB micellar solution which may be due to coordinating ability of substrate to complex, electrostatic interaction between micelles and complex and due to electrostatic interaction between micelles with reactant.

Keywords:

• Hydrolysis
• kinetic treatment
• Mn(Niten)2H₂O complex
• p-nitrophenyl acetate

Notes

^a 0.01 mol dm⁻³ Tris-TrisH⁺ buffer solution (µ = 0.1 KNO₃), [CTAB] = 0.01 mol dm⁻³, [complex] = 2 × 10⁻³ mol dm⁻³, [PNPA] = 2 × 10⁻⁵ mol dm⁻³.

^a 0.01 mol dm⁻³ Tris-TrisH⁺ buffer solution (µ = 0.1 KNO₃), [CTAB] = 0.01 mol dm⁻³, [complex] = 2 × 10⁻³ mol dm⁻³, [PNPA] = 2 × 10⁻⁵ mol dm⁻³.