Dioxygen affinities of Schiff base cobalt(II) complexes with aza-crown or morpholino pendants

作者：Li, Jian-zhang^*; Wei, Lei; Feng, Fa-Mei; Zeng, Jun; Qin, Sheng-ying

来源：Transition Metal Chemistry, 2010, 35(4): 463-468.

DOI：10.1007/s11243-010-9350-5

• TRANSITION-METAL-COMPLEXES
• CATALYTIC EPOXIDATION PERFORMANCE
• MN(III) COMPLEXES
• OXYGEN CARRIERS
• OXIDATION

Schiff base Co(II) complexes, CoL21-CoL26 with aza-crown or morpholino pendants were synthesized. The oxygenation constants (KO2) of these complexes in MeOCH2CH2OMe solution were measured over the range of -5 to 25 degrees C, and the thermodynamic parameters (Delta H-0, Delta S-0) for oxygenation were calculated based on these KO2 values. The effects of different substituents on the Schiff base ligand with respect to the modulation of O-2-binding capability were explored. The results indicate that the dioxygen affinities of the Co(II) complexes are much more enhanced by aza-crown pendants than that by morpholino pendants, and the O-2-binding capabilities of the aza-crown pendants complexes can also be enhanced by adding Na+ cations.

• 出版日期2010-5
• 单位四川轻化工大学; 四川大学