Citation: Xing Yao WEI, Jian Zhang LI, Ying DU, Sheng Ying QING. Dioxygen Affinities and Biomimetic Catalytic Oxidation Performance of Transition-metal Complexes with Unsymmetrical Bis-Schiff Bases[J]. Chinese Chemical Letters, ;2004, 15(5): 529-531. shu

Dioxygen Affinities and Biomimetic Catalytic Oxidation Performance of Transition-metal Complexes with Unsymmetrical Bis-Schiff Bases

Department of Chemistry, Sichuan University, Chengdu 610064

Received Date: 27 May 2003

Fund Project: This work was supported by the National Natural Science Foundation of China (Grant No. 29572059).

The oxygenation constants and thermodynamic parameter (ΔΔH^o, ΔS^o) of Co (II) complexes with unsymmetrical bis-Schiff baeses were measured and their Mn(III) complexes as models of mimicking monooxygenase were employed to catalyze epoxidation of styrene. The effect of substituent R in a salicylidene of ML¹~ML⁴[M=Co (II), Mn (III)Cl] on the dioxygen affinities and biomimetic catalytic oxidation performance were also investigated. Among them, the MnL⁴Cl containing a pendant benzoaza crown ether ring showed highest conversion and selectiviy up to 54.9% and 96.9% respectively.
- Unsymmetrical bis-Schiff baeses,
- benzoaza crown ether,
- transition-metal complexes,
- dioxygen affinities,
- catalytic epoxidation
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