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The COVID-19 pandemic was uniquely challenging for public health workers charged with enforcing recommendations. In the United States, media reports highlight frequent outbursts and threats from community members and elected officials regarding masking protocols, vaccine mandates, and other public health measures such as isolation/quarantining recommendations. Given this backdrop, the purpose of this study was to better understand the lived experiences of this critical workforce in the context of COVID-19. We conducted in-depth phone interviews with public health workers in Ohio ( N = 11). Questions were designed to illicit workers' experiences and sense-making of the pandemic experience. We analyzed results using the techniques of interpretive phenomenological analysis. Five major themes focused on how workers experienced public perceptions of COVID-19 and the public health response. Three themes highlight the role of media and social media in polarizing public perceptions. These we note as: Dealing with Deadlock, Feeling Misunderstood and Misrepresented, and The Rollercoaster of Public Opinion. Getting on With the Work reveals strategies used to navigate public perceptions and misperceptions. This ranged from aggressive education and information sharing, to setting boundaries around the controversial or disputed aspects of the pandemic. Finally, After the Dust Settles comments on hopes for postpandemic transformations of public health and public perceptions thereof. These results can inform new pathways for public health. Paramount among these are effective strategies that address public knowledge, values, and worldviews. Such messaging must promote nuanced understanding and customized approaches for local realities, rather than relying on rigid dichotomies that further polarization and distrust.

We use 2H nuclear magnetic resonance (NMR) to study water (D2O) reorientation and diffusion in the metal-organic framework MFU-4l, which features a regular three-dimensional network of nearly spherical pores with diameters of 1.2 and 1.9 nm. We observe that the rotational correlation times follow Vogel-Fulcher-Tammann and Arrhenius (Ea = 0.48 eV) relations above ∼225 K and below ∼170 K, respectively, whereas the temperature dependence continuously evolves from one to the other behavior in the broad crossover zone in between. In the common temperature range, the present NMR results are fully consistent with previous broadband dielectric spectroscopy (BDS) data on water (H2O) in a very similar framework. Several of our observations, e.g., rotational-translational coupling, indicate that a bulk-like structural (α) relaxation is observed above the crossover region. When cooling through the crossover zone, a quasi-isotropic reorientation mechanism is retained, while 2H spin-lattice relaxation evolves from exponential to nonexponential, implying that the water dynamics probed at low temperatures does no longer fully restore ergodicity on the time scale of this experiment. We discuss that the latter effect may result from bulk-like and/or confinement-imposed spatially heterogeneous water properties. Comparison with previous NMR and BDS results for water in other confinements reveals that, for confinement sizes around 2 nm, water reorientation depends more on the pore diameter than on the pore chemistry, while water diffusion is strongly affected by the connectivity and topology of the pores., (© 2023 Author(s). Published under an exclusive license by AIP Publishing.)

The nature of the chemical bonding between NO and open-shell Ni II ions docked in a metal-organic framework is fully characterized by EPR spectroscopy and computational methods. High-frequency EPR experiments reveal the presence of unsaturated Ni II ions displaying five-fold coordination. Upon NO adsorption, in conjunction with advanced EPR methodologies and DFT/CASSCF modelling, the covalency of the metal-NO and metal-framework bonds is directly quantified. This enables unravelling the complex electronic structure of Ni II -NO species and retrieving their microscopic structure.

π-Extended acenaphtho[1,2-d][1,2,3]triazoles, the unsubstituted Anta-H and its di-tert-butyl derivative Dibanta-H, as well as 5,6,7,8-tetrahydro-1H-naphtho[2,3-d][1,2,3]triazole Cybta-H were obtained in concise syntheses. In the solid state, Dibanta-H forms an unprecedented hydrogen-bonded cyclic tetrad, stabilized by dispersion interactions of the bulky tBu substituents, whereas a cyclic triad was found in the crystal structure of Anta-H. These cyclic assemblies form infinite slipped stacks in the crystals. Evidence for analogous hydrogen-bonded self-assembly in solution was provided by low-temperature NMR spectroscopy and computational analyses. Kuratowski-type pentanuclear complexes [Zn 5 Cl 4 (Dibanta) 6 ] and [Zn 5 Cl 4 (Cybta) 6 ] were prepared from the respective triazoles. In the Dibanta complexes, the π-aromatic surfaces of the ligands extend from the edges of the tetrahedral Zn 5 core, yielding an enlarged structure with significant internal molecular free volume and red-shifted fluorescence., (© 2021 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)

In this work, we introduce the first enantiopure bistriazolate-based metal-organic framework, CFA-18 (Coordination Framework Augsburg-18), built from the R-enantiomer of 7,7,7',7'-tetramethyl-6,6',7,7'-tetrahydro-3H,3'H-5,5'-spirobi[indeno[5,6-d]-[1,2,3]triazole] (H2-spirta). The enantiopurity and absolute configuration of the new linker were confirmed by several chiroselective methods. Reacting H2-spirta in hot N,N-dimethylformamide (DMF) with manganese(ii) chloride gave CFA-18 as colorless crystals. The crystal structure with the composition [Mn2Cl2(spirta)(DMF)2] was solved using synchrotron single-crystal X-ray diffraction. CFA-18 shows a framework topology that is closely related to previously reported metal-azolate framework (MAF) structures in which the octahedrally coordinated manganese(ii) ions are triazolate moieties, and the chloride anions form crosslinked one-dimensional helical chains, giving rise to hexagonal channels. In contrast to MAFs crystallizing in the centrosymmetric space group R3[combining macron], the handedness of the helices found in CFA-18 is strictly uniform, leading to a homochiral framework that crystallizes in the trigonal crystal system within the chiral space group P3121 (no. 152).