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Disentangling Driving Force Effects, Polar Effects, /H Imbalance, and Other Influences on H-Atom Transfer Reactions.
J Am Chem Soc
January 2025
Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States.
Hydrogen atom transfer (HAT) reactions and their kinetic barriers Δ are important in organic and inorganic chemistry. This study examines factors that influence Δ, reporting the kinetics and thermodynamics of HAT from various ruthenium bis(acetylacetonate) pyridine-imidazole complexes to nitroxyl radicals. Across these 36 reactions, the Δ and Δ can be independently varied, with different sets of Ru complexes primarily tuning either their ps or their °s.
View Article and Find Full Text PDFUnlocking 3D printing technology for microalgal production and application.
Adv Biotechnol (Singap)
October 2024
Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources and Environment, Nanchang University, Nanchang, 330031, China.
Microalgae offer a promising alternative for sustainable nutritional supplements and functional food ingredients and hold potential to meet the growing demand for nutritious and eco-friendly food alternatives. With the escalating impacts of global climate change and increasing human activities, microalgal production must be enhanced by reducing freshwater and land use and minimizing carbon emissions. The advent of 3D printing offers novel opportunities for optimizing microalgae production, though it faces challenges such as high production costs and scalability concerns.
View Article and Find Full Text PDFA simple cavity-enhanced laser-based heater for reflective samples.
Rev Sci Instrum
January 2025
Institute for Physical Chemistry, University of Göttingen, 37077 Göttingen, Germany.
Surface science instruments require excellent vacuum to ensure surface cleanliness; they also require control of sample temperature, both to clean the surface of contaminants and to control reaction rates at the surface, for example, for molecular beam epitaxy and studies of heterogeneous catalysis. Standard approaches to sample heating within high vacuum chambers involve passing current through filaments of refractory metals, which then heat the sample by convective, radiative, or electron bombardment induced heat transfer. Such hot filament methods lead to outgassing of molecules from neighboring materials that are inadvertently heated; they also produce electrons and ions that may interfere with other aspects of the surface science experiment.
View Article and Find Full Text PDFResolving the Ambiguity of Thermal Reversion in a Nonconjugated Monocyclic Diene-Based Photoswitch for Rechargeable Solar Thermal Batteries.
J Phys Chem A
January 2025
Laboratory of Advanced Computation and Theory for Materials and Chemistry, Department of Chemistry, National Institute of Technology Warangal (NITW), Warangal, Telangana 506004, India.
We report nonconjugated monocyclic dienes (nCMDs) as unique photoswitchable molecules that hold promise for harvesting substantial solar energy and storing it for extended durations. Herein, cyclohepta-1,4-diene and its N-heterocyclic analogue have been considered as prototypical models for investigating photoswitching behavior in nCMDs. Initially, the nonradiative deactivation pathway of nCMD from the low-lying excited state to the [2 + 2]-cycloadduct has been evaluated.
View Article and Find Full Text PDFImpact of light and nutrient availability on the phagotrophic activity of harmful bloom-forming dinoflagellates.
J Plankton Res
July 2024
Écologie Pélagique (DYNECO/PELAGOS), Institut Français de Recherche pour l'Exploitation de la Mer, IFREMER, 29280 Plouzané, France.
Phagotrophy is a key nutritional mode for many bloom-forming dinoflagellates that can supplement their carbon and nutrient requirements. However, the environmental drivers and ecological relevance of phagotrophy in algal blooms are still poorly understood. This study evaluates the effect of light and nutrient availability on the phagotrophic activity of three common bloom-forming dinoflagellates (, and ) using three fluorescently labeled preys: bacteria, and the haptophyte .
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