Publications by authors named "V A Fedin"
The separation of light alkanes is one of the most important tasks for modern industry due to the widespread use of ethane and propane as chemical feedstocks. Their extraction from natural gas is a challenging task and is now carried out by cryogenic distillation at a limited number of plants around the world. The development of new materials for adsorption separation is therefore important.
View Article and Find Full Text PDFFour new metal-organic frameworks with the formulae [Sm(phen)(NO)(chdc)]·2solv, where solv = ,-dimethylformamide (DMF; 1), ,-dimethylacetamide (DMA; 2), ,-diethylformamide (DEF; 3), -formylpiperidine (NFP; 4), phen = 1,10-phenanthroline and chdc = -1,4-cyclohexanedicarboxylate were synthesized and structurally characterized. These compounds are based on similar binuclear samarium(III)-carboxylate blocks, bound by flexible chdc linkers into layered -type coordination networks. The amide solvents drive different intralayer block orientations between 1 and 2-4 and different layer-to-layer packings in all the described compounds.
View Article and Find Full Text PDFThree new three-dimensional (3D) metal-organic frameworks [M(ttdc)(dabco)] (M = Zn(II), 1-Zn; Cu(II), 1-Cu; and Zn/Cu, 1-ZnCu) based on thieno[3,2-]thiophene-2,5-dicarboxylate (ttdc) were synthesized and characterized by a combination of physicochemical methods (single crystal X-ray diffraction, powder X-ray diffraction, chemical and thermogravimetric analyses and IR spectroscopy). 1-Cu demonstrated permanent porosity ( = 0.790 cm g and = 1725 m g) and significant CO, CH, CH, CH and CH gas uptakes under ambient conditions.
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- Heavy metal ions and antibiotic contamination are significant global environmental issues, requiring efficient methods for detecting them at very low concentrations.
- The study focused on luminescent Ln-MOF materials, particularly NIIC-3-Tb, which showed a fast and selective response to detecting mercury and sulfadiazine at subnanomolar levels.
- Advanced techniques revealed the mechanisms of interaction for both pollutants, demonstrating that NIIC-3-Ln materials can effectively sense contaminants while also providing insights into their sensing mechanisms at a molecular level.
Article Synopsis
- A new 3D metal-organic framework, MOF 1, was synthesized, showcasing bright blue-green luminescence with a quantum yield of 74%.
- MOF 1 responds to the toxic compound gossypol by quenching its luminescence and enhances luminescence when interacting with certain trivalent metal cations.
- The framework allows for the detection of gossypol (0.20 µM) and gallium(III) (1.1 µM), providing a method to distinguish between pure sunflower oil and adulterated oil using luminescent properties.