AI Article Synopsis

  • - A new metal-organic framework (MOF), labeled as 1, was created with a unique structure and showed significant CO gas adsorption capacities at low temperatures.
  • - By immersing the original MOF in 4-picoline, researchers produced nanosheets (1-ns) that have a different, two-dimensional structure, with thorough characterization confirming their properties.
  • - The 1-ns exhibited better electrochemical performance compared to the original 3D structure (1) and showed potential for oil/water separation due to its hydrophobic surfaces, highlighting diverse applications for these materials.

Article Abstract

A pillared-layered metal-organic framework (MOF) {[Zn(atpt)(bpBTD)]·} (1), where Hatpt = 2-aminoterephthalic acid and bpBTD = bis(pyridin-4-yl)benzothiadiazole, showing a pcu net topology with double interpenetration was successfully constructed. Thermally activated 1 possessed free voids of 15.3% and repeatedly exhibited two-step CO adsorption isotherms over three runs, with uptakes of 138.8 cm g STP at 195 K and / = 1. Through a ligand replacement exfoliation approach, metal-organic framework (MOF) nanosheets {[Zn(atpt)(4-picoline)]} (1-ns) with a 2D sql net topology were obtained by immersing 1 in 4-picoline. Characterization of 1-ns was achieved using energy-dispersive X-ray spectroscopy (EDS), infrared (IR) spectroscopy, X-ray powder diffraction (XRPD) patterns, and elemental analyses (EA) as well as scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Photoluminescence spectra showed that 1 and 1-ns both emitted blue-light fluorescence in HO. In addition, measurements of water contact angles indicated that 1 is highly hydrophilic, while 1-ns shows poor hydrophilicity compared with 1. The double-sided hydrophobic surfaces of 1-ns allowed oil (dichloromethane) but not water to pass through, making it a good candidate for oil/water separation. Electrochemical measurement revealed that the 2D metal-organic nanosheet 1-ns modified glassy carbon electrode (1-ns/GCE) possessed much better electron transfer ability than the 3D pillared-layer framework 1 modified glassy carbon electrode (1/GCE), and thus improves the electrochemical performance and sensitivity.

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Source
http://dx.doi.org/10.1039/d3dt04379gDOI Listing

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