Co(II) coordinated metal-organic framework: An efficient catalyst for heterogeneous aerobic olefins epoxidation

An 8-connected, linear trinuclear cluster-based microporous metal organic framework (NH4)(2)[Co-3(Ina)(BDC)(3)(HCOO)] (denoted as CO(3)InaBDC(3), Ina = isonicotinate and BDC = 1,4-benzenedicarboxylate, CCDC is 935147) had been successfully synthesized by a facile hydrothermal synthesis method. The compound was extended through BDC linkers breadthwise and Ina linkers lengthways to the highly-connected framework. The CO(3)InaBDC(3) was characterized through FT-IR, N-2 adsorption, XRD, TGA and SEM, and its characteristic structure was elucidated by single crystal X-ray diffraction. Using O-2 as oxidant, the CO(3)InaBDC(3) was investigated as a good performed heterogeneous catalytic material for cydooctene epoxidation. An extremely high turnover frequency (1370 h(-1)) for epoxycyclooctane was achieved, and CO(3)InaBDC(3) exhibited excellent stabilities in 5 recycles without any loss of its catalytic performance. (C) 2013 Elsevier B.V. All rights reserved.