Building a cobaloxime-based metal–organic framework for photocatalytic aerobic oxidation of arylboronic acids to phenols

Abstract

Herein, the design and synthesis of an unprecedented cobaloxime-based zirconium metal-organic framework (Zr-TCPCo) with an she net is reported. This heterogeneous material as a photocatalyst exhibits excellent catalytic activity for...

Designing a binuclear copper center-incorporated photocatalyst to simulate enzyme catalysis in aerobic hydroxylation of phenylboronic acids

“…Et 3 N plays the role of an electron donor to regenerate phenol via single electron transfer (SET). [52][53][54] The I-V curve of irradiated Cu(I)W-TPT (red) shows high conductivity, further verifying the good continuous photoelectron transfer with the addition of TEA (Fig. 6c).…”

Cobaloxime-based homogeneous and metal-organic framework photocatalytic systems for selective reduction of acetylene to ethylene

“…and ∼9° indicated a long-range order along the c-axis, and this is consistent with the previous partially collapsed framework structure obtained after DMF solvent removal. 40,59 The partially collapsed structure is also supported by SEM imaging, which shows spherical particles (Figure S18). The XPS spectrum of ZrCo-MOF is nearly identical to that of [Co(dmgH)2pyCl], showing that the Co in the MOF remains Co 3+ following MOF synthesis (Figure 5b).…”

“…In an effort to increase the robustness of our [Co(dmgH)2pyCl]-based photocatalytic system and to endow recyclability, we sought to create a heterogeneous version of our photocatalytic system by using a cobaloxime as the linker in a MOF. Following previously employed strategies, 40,59 we synthesized a polytopic cobaloxime linker ([Co(dcpgH)2Cl2], dcpgH = 4,4′-(1,2-bis(hydroxyimino)ethane-1,2diyl)dibenzoic acid) with four carboxylate anchors for binding to hexazirconium(IV) nodes, which yielded ZrCo-MOF. The PXRD pattern of the obtained material shows intense peaks in the low angle range, characteristic of porous materials (Figure 5a).…”

NPh3-Mediated WO3-Photocatalyzed Semiheterogeneous Hydroxylation of Aryl and Alkyl Boronic Acids

“…Therefore, tremendous efforts have been made to construct such motifs . Given the abundance and accessibility of organic boronic acid, a series of heterogeneous photocatalyzed oxidative hydroxylation of aryl boronic acids with air (or pure dioxygen) have been established for synthesizing phenols (Scheme a) . Recently, Kokotos and colleagues reported the UVA light-induced photocatalytic hydroxylation of boronic acids in the presence of N , N -diisopropylethylamine (1 equiv) as the base .…”