Co(II) complexes loaded into metal–organic frameworks as efficient heterogeneous catalysts for aerobic epoxidation of olefins

Co(II) complexes loaded into metal–organic frameworks as efficient heterogeneous catalysts for aerobic epoxidation of olefins

Type	Journal Article
Author	Jingjing Wang
Author	Mu Yang
URL	http://pubs.rsc.org/en/content/articlelanding/2016/cy/c5cy01099c
Volume	6
Issue	1
Pages	161-168
Publication	Catalysis Science & Technology
Date	2015.12.21
Abstract	A series of efficient cobalt(II)-anchored Cr-MOF (Cr-MIL-101-NH2) catalysts, including Co(II)@Cr-MIL-101-Sal, Co(II)@Cr-MIL-101-P2I and Co(II)@Cr-MIL-101-P3I, were synthesized by one-pot modification of the terminal amino group with salicylaldehyde, pyridine-2-aldehyde or pyridine-3-aldehyde and anchoring of Co(II) ions into the mesoporous Cr-MOF supports. The Co(II)@Cr-MIL-101-P2I catalyst displayed high catalytic performance for epoxidation of olefins with air as an oxidant due to the nitrogen atom in the pyridine ring as a strong electron-withdrawing substituent, high dispersion of Co(II) species and high surface area for sufficient contact between the substrate and active sites. The strong coordination interaction between the Co(II) ions and chelating groups in the Co(II)@Cr-MIL-101-P2I catalyst guaranteed the excellent recycling performance.