Catecholase-Like Activity and Theoretical Study in Solid State of a New Ru(III)-Schiff Base Complex

Area of Science:

• Inorganic Chemistry
• Coordination Chemistry
• Catalysis

Background:

• Ruthenium complexes are explored for catalytic applications.
• Schiff base ligands offer versatile coordination environments.
• Halogen bonding plays a role in solid-state interactions.

Purpose of the Study:

• Synthesize and characterize a new ruthenium(III) Schiff base complex.
• Investigate its catecholase-like catalytic activity.
• Analyze halogen bonding interactions using computational methods.

Main Methods:

• Synthesis of a ruthenium(III) Schiff base complex [Ru(PPh3)Cl2(L)].
• Characterization using FT-IR, UV-Vis, cyclic voltammetry, and X-ray crystallography.
• Computational analysis using MEP and NCI plot tools.
• Enzymatic kinetic studies using 3,5-di-tert-butylcatechol (3,5-DTBC) and Michaelis-Menten kinetics.

Main Results:

• The complex exhibits a distorted octahedral geometry around the Ru(III) ion.
• Theoretical studies revealed insights into halogen bonding interactions.
• The complex demonstrated significant catecholase-like activity, converting 3,5-DTBC to 3,5-DTBQ.
• High catalytic efficiency was observed with a turnover number (T.O.N.) of 2.346×10^3 h^-1.

Conclusions:

• The synthesized ruthenium(III) complex is structurally characterized and shows potential catalytic properties.
• The complex acts as an efficient biomimetic catalyst for catechol oxidation.
• Computational analysis provides a deeper understanding of its solid-state interactions.