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The luminescent semiconductor Pb₇I₆(CN₂)₄
(2024)Dalton TransactionsThe development of new compounds in the domain of metal dinitridocarbonates is most efficiently performed via solid-state metathesis or simply by addition reactions. Our discovery of Pb₇I₆(CN₂)₄ is the result of a solid-state reaction of PbCN₂ with PbI₂ at 420 degrees C. Its crystal structure was solved and refined from X-ray diffraction data based on a single crystal with the space group P6₃/mmc. The crystal structure is based on a network ...Journal Article -
Relaxation enhancement by microwave irradiation may limit dynamic nuclear polarization
(2024)Physical Chemistry Chemical PhysicsDynamic nuclear polarization enables the hyperpolarization of nuclear spins beyond the thermal-equilibrium Boltzmann distribution. However, it is often unclear why the experimentally measured hyperpolarization is below the theoretically achievable maximum polarization. We report a (near-) resonant relaxation enhancement by microwave (MW) irradiation, leading to a significant increase in the nuclear polarization decay compared to measurements ...Journal Article -
Plasmon resonance dynamics and enhancement effects in tris(2,2′-bipyridine)ruthenium(II) gold nanosphere oligomers
(2024)NanoscaleRuthenium-based metal complexes are one of the most widely studied dyes because of their rich photochemistry and light-harvesting properties. Significant attention has been paid to the energy and charge transfer dynamics of these dyes on semiconductor substrates. However, studies on photophysical and photochemical properties of these dyes in plasmonic environments are rare. In this study, we report a plasmon-mediated resonance energy ...Journal Article -
Delving into Fe-content effects on surface reconstruction of Ba0.50Sr0.50Co1−xFexO3−δ for the oxygen evolution reaction
(2024)Journal of Materials Chemistry ASurface reconstruction of cobalt-based oxides is recognized as a key to efficiently electrocatalyze the oxygen evolution reaction (OER) in alkaline environment. Identifying material features that promote surface reconstruction is crucial to rationally improve OER electrocatalysts. Here, the Fe-content effects on the surface reconstruction of flame-spray synthesized Ba0.50Sr0.50Co1-xFexO3-delta (BSCo1-xFex) is systematically investigated ...Journal Article -
The formation, reactivity and transformation pathways of formaldehyde in the methanol-to-hydrocarbon conversion
(2024)Catalysis Science & TechnologyCoke-induced catalyst deactivation is one of the major challenges in commercial methanol-to-hydrocarbon (MTH) conversion processes. It is suspected to be critically dependent on formaldehyde-mediated reactions. Using photoelectron photoion coincidence and operando diffuse reflectance UV-vis spectroscopy techniques, we reveal details of formaldehyde formation and reactivity over industrially relevant ZSM-5 catalysts, and its role in the ...Journal Article -
Reactions of hypobromous acid with dimethyl selenide, dimethyl diselenide and other organic selenium compounds: Kinetics and product formation
(2024)Environmental Science: Water Research & TechnologySelenium (Se) is an essential micronutrient for many living organisms particularly due to its unique redox properties. We recently found that the sulfur (S) analog for dimethyl selenide (DMSe), i.e. dimethyl sulfide (DMS), reacts fast with the marine oxidant hypobromous acid (HOBr) which likely serves as a sink of marine DMS. Here we investigated the reactivity of HOBr with dimethyl selenide and dimethyl diselenide (DMDSe), which are the ...Journal Article -
Drivers and mechanisms that contribute to microbial β-diversity patterns and range sizes in mountains across a climatic variability gradient
(2024)EcographyMicrobial communities are highly diverse, yet the mechanisms underlying microbial community assembly are not well understood. Janzen's mountain passes hypothesis proposed that climatic barriers and dispersal limitation shape communities to a greater extent in mountains with lower climatic variability and overlap, permitting higher levels of species coexistence. Here, we investigate changes in microbial community dissimilarities, distributional ...Journal Article -
Interpenetrating network hydrogels for studying the role of matrix viscoelasticity in 3D osteocyte morphogenesis
(2024)Biomaterials ScienceDuring bone formation, osteoblasts are embedded in a collagen-rich osteoid tissue and differentiate into an extensive 3D osteocyte network throughout the mineralizing matrix. However, how these cells dynamically remodel the matrix and undergo 3D morphogenesis remains poorly understood. Although previous reports investigated the impact of matrix stiffness in osteocyte morphogenesis, the role of matrix viscoelasticity is often overlooked. ...Journal Article -
Future costs of power-to-liquid sustainable aviation fuels produced from hybrid solar PV-wind plants in Europe
(2024)Sustainable Energy & FuelsSustainable Aviation Fuels (SAFs) produced from renewable electricity via Power-to-Liquids (PtL), also called e-jet fuel, can reduce net greenhouse gas emissions of aircraft by up to 90%, but they are markedly more expensive than fossil jet fuel. Their future production costs are particularly dependent on the cost of renewable electricity and, to date, not analysed with high geographical scope and resolution. This study assesses the future ...Journal Article -
Embedding Pd into SnO₂ drastically enhances gas sensing
(2024)Nanoscale AdvancesCombustion aerosol processes can uniquely embed noble metals into semiconducting particles. Here, monocrystalline SnO2 particles embedded with Pd and/or PdOx were made by flame spray pyrolysis (FSP) of appropriate precursors through microexplosions by droplet-to-particle conversion as the crystal size was proportional to the cube root of precursor solution concentration, C. These particles were air-annealed and leached with nitric acid ...Journal Article