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Controlling pseudopolymorphism robust and repetitive solvent-containing supramolecular interactions in urea-based isostructural coordination polymers.
Dalton Trans
January 2025
Department of Inorganic Chemistry, Shahid Beheshti University, 1983969411, Tehran, Iran.
In a systematic study, six pseudopolymorphic coordination polymers containing the ditopic 1,3-di(pyridin-4-yl)urea ligand (4bpu) constructed with d metal cations, possessing the formula {[M(4bpu)I]S} [(M = Zn, Cd and Hg), (S = MeOH or EtOH)], namely Zn-MeOH, Zn-EtOH, Cd-MeOH, Cd-EtOH, Hg- and Hg-EtOH were obtained. The title compounds were characterized by single-crystal X-ray diffraction analysis (SC-XRD), elemental analysis (CHN), FT-IR spectroscopy, thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD). The diffraction studies show that these compounds are isostructural 1D zig-zag chain coordination polymers which is also confirmed using XPac 2.
View Article and Find Full Text PDFAnaerobic spp. degrade sulfoquinovose via a bifurcated 6-deoxy-6-sulfofructose transketolase/transaldolase pathway to both C- and C-sulfonate intermediates.
Front Microbiol
December 2024
Department of Biology, University of Konstanz, Konstanz, Germany.
Plant-produced sulfoquinovose (SQ, 6-deoxy-6-sulfoglucose) is one of the most abundant sulfur-containing compounds in nature and its bacterial degradation plays an important role in the biogeochemical sulfur and carbon cycles and in all habitats where SQ is produced and degraded, particularly in gut microbiomes. Here, we report the enrichment and characterization of a strictly anaerobic SQ-degrading bacterial consortium that produces the C-sulfonate isethionate (ISE) as the major product but also the C-sulfonate 2,3-dihydroxypropanesulfonate (DHPS), with concomitant production of acetate and hydrogen (H). In the second step, the ISE was degraded completely to hydrogen sulfide (HS) when an additional electron donor (external H) was supplied to the consortium.
View Article and Find Full Text PDFTcESTIME: predicting high-temperature hydrogen-based superconductors.
Chem Sci
December 2024
Laboratoire de Chimie Théorique (LCT), Sorbonne Université, CNRS 4 Pl. Jussieu Paris 75005 France
Superconductivity can be considered among the most exciting discoveries in material science of the 20th century. However, the hard conditions for the synthesis and the difficult characterization, make the statement of new high critical temperature ( ) complex from the experimental viewpoint and have recently led to several hot controversies in the literature. In this panorama, theory has become a trustworthy diagnosis.
View Article and Find Full Text PDFTriphenylamine-Based Push-Pull Dyes for Chromogenic Detection of HSO Ion in Water: The Role of Anion in the Formation of Fluorescent Organic Nanoparticles.
J Org Chem
December 2024
Department of Chemistry, Birla Institute of Technology and Science, Pilani, Telangana 500078, India.
Optical detection of the HSO ion in pure aqueous medium is rare, owing to the very high Gibbs free energy of hydration and ambiguity to distinguish with the isostructural HPO ion. Herein, a pair of triphenylamine-based push-pull dyes with different numbers of terminal pyridine fragments, connected via an acetylenic linker, were synthesized by Sonogashira cross-coupling reaction. These two dyes displayed highly selective (LOD = 15.
View Article and Find Full Text PDFTowards superior CORR catalysts: Deciphering the selectivity puzzle over dual-atom catalyst.
J Colloid Interface Sci
February 2025
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China. Electronic address:
The electrocatalytic CO reduction reaction (CORR) is one of the most important electrocatalytic reactions. Starting from a well-defined *CO intermediate, the CORR can bifurcate into two pathways, either forming a hydrogenation product by *CO bond hydrogenation or leading to CO desorption by *C bond cleavage. However, it is perplexing why many dual-atom catalysts (DACs) exhibit high CO selectivity in experiments, despite previous theoretical studies arguing that the *CO bond hydrogenation is thermodynamically more favorable than the *C bond breaking.
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