A highly stable metal–organic framework with cubane-like clusters for the selective oxidation of aryl alkenes to aldehydes or ketones. Issue 26 (16th June 2021)

• Record Type: Journal Article
• Authors: Liu, Teng; Shen, Xianfu; Shen, Xiang; He, Chixian; Liu, Jiaming; Liu, Jian-Jun
• Is Part Of: CrystEngComm. Volume 23:Issue 26(2021)
• Page Start: 4667
• Page End: 4673
• Publication Date: 2021-06-16
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d1ce00545f
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : A novel MOF with cubane-like clusters was prepared based on an electron-deficient triazine derivative, and it exhibits excellent thermal and chemical stability and can be used for the selective oxidation of aryl alkenes to aldehydes or ketones in mild conditions. Abstract : Triazine derivatives, a class of electron-deficient π-conjugated molecules with high photochemical activity and excellent luminescent characteristics, have been utilized as a kind of electron-acceptor for the construction of molecular cages, luminescent and photochromic materials. In this paper, a novel and highly stable MOF with cubane-like clusters, [Co4 (SO4 )3 (F)3 (tpt)2 (tatb)] (1 ) (tpt = 2, 4, 6-tris-(4-pyridyl)-1, 3, 5-triazine, H3 tatb = 4, 4′, 4′′-(1, 3, 5-triazine-2, 4, 6-triyl)tribenzoic acid), has been successfully synthesized based on a triazine derivative, and possesses unprecedented sulfate- and fluoride-bridged cubane-type tetranuclear cobalt clusters and a 3D + 3D → 3D open framework. Compound 1 shows a rather high BET surface area and exhibits excellent thermal stability and high chemical stability in common solvents and even in acidic or basic solutions (in a pH range from 4 to 12). Moreover, catalytic measurements show that compound 1 is an excellent heterogeneous catalyst for the selective oxidation of aryl alkenes to aldehydes or ketones with conversions of 97%.