New two fold interpenetrating 3D polyoxovanadate-based metal–organic framework as bifunctional catalyst for the removal of 2-chloroethyl ethyl sulfide and phenolic compounds

Abstract

The design and synthesis of a bifunctional catalyst to tackle environmental pollution caused by 2-chloroethyl ethyl sulfide (CEES) and phenolic compounds is meaningful. In this study, a new three-dimensional (3D) polyoxovanadate (POV)-based metal-organic framework, [Co(L)(V 4 O 12 ) 0.5 (H 2 O)]•2H 2 O (1; L = N,N'-bis(3methylpyridin-3-yl)-2,6-naphthalenediamide), was synthesized under hydrothermal conditions. 1 was characterized using single-crystal Xray diffraction analysis, infrared spectroscopy, and powder X-ray diffraction. Structural analysis shows that the [V 4 O 12 ] 4-clusters and pairs of Co 2+ cations are alternately connected to form a onedimensional inorganic chain, eventually generating a 3D (4,4)connected framework through the expansion of L, which exhibits a two fold interpenetration array. As a bifunctional catalyst, 1 exhibits satisfactory catalytic properties for the selective oxidation of 2-chloroethyl ethyl sulfide to the corresponding sulfoxide, with an effective conversion of > 99% and selectivity of 97%. Furthermore, 1 exhibits excellent photocatalytic degradation activity toward phenol, 2-chlorophenol, and m-cresol under visible light. The degradation efficiencies were above 92.6% for 140 min. The photocatalytic reaction kinetics, mechanisms of photodegradation, and recycling capability of phenol were also investigated in detail.

Polyoxovanadate-Based Metal–Organic Frameworks with Dual Active Sites for the Synthesis of p-Benzoquinones

“…As shown in Figure S10, all the diffraction peaks are in agreement with the simulated peaks from the single-crystal data. The FTIR spectra of compounds 1 and 2 are displayed in Figure S9, and the characteristic bands at 900–1000 and 500–650 cm –1 are attributed to the VO stretching mode and V–O–V bending vibrations, respectively. − The apparent absorption bands in the 1200–1600 cm –1 region are assigned to CC and CN of ligand tpi. The broad band at around 3400 cm –1 belongs to the O–H stretching vibration.…”

4,4′-Bis(imidazolyl)biphenyl-appended Cd(ii) coordination polymer: a dual-functional material for antibiotic sensing and photodegradation

“…Coordination polymers (CPs) are a diverse class of materials that form a wide range of two- and three-dimensional architectures for applications such as CO 2 collection, photoluminescence, dye adsorption, magnetic characteristics, drug delivery, sensing, and photocatalysis. 7,8 These materials are used as sensors to detect nitroaromatic compounds and pharmaceutical wastes. They also decompose waste products when exposed to UV radiation and hence can be employed as photocatalytic materials for the safe and sustainable decomposition of dyes and antibiotics in waste water discharge.…”

“…They also decompose waste products when exposed to UV radiation and hence can be employed as photocatalytic materials for the safe and sustainable decomposition of dyes and antibiotics in waste water discharge. 8 In coordination polymers (CPs), the inherent stability of inorganic units and the versatility of organic units, including large surface areas, adjustable pore sizes, active sites, and easily modifiable functional groups contribute to their widespread application in sensing and detecting metal ions, anions, explosives, and biomarkers. 9,10…”