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Atomic Weights Change and the Mole is Redefined: Chemical Education
No full textThe chemistry community is encouraged to keep up to date with revisions to standard atomic weights and definitions of SI base units, including the mole
The Code of Ethics for Chemists between Universal Moral Values and Local Reality
Full text linkIn an increasingly globalized world, threatened by resource depletion, global warming and pollution, scientists in general and the chemists in particular are obliged to rapidly integrate ethical values into their work. This article shows that the codes of ethics are a valuable aid in this process. Two real life examples are highlighted. The first one concerns a misbehaviour situation from an academic, while the second one presents the entangled political, economic and legal implications brought about by the pollution by polychlorobiphenyls (PCBs) of the landfill La Pila, in the canton of Fribourg. Ultimately, the article underscores the collective responsibility of scientists, policy makers and economical players to uphold ethical excellence, for the benefit of the whole society and of everyone
EquipSent – Enabling Sustainable Education, Everywhere
Full text linkEquipSent is a volunteer-based non-profit organization aiming at creating conditions for sustainable teaching, study, and academic research worldwide. Used, functional equipment is collected by its members, who are responsible for matching the donations with the receivers in need. After starting in 2017, nine big transfers were accomplished that significantly impacted the quality of local scientific and educational life. In this article, we show how EquipSent as an organization strives to align with the Sustainable Development Goals (SDG) in Chemistry in Switzerland
Improving the Sensitivity of pH Glass Electrodes Towards Ultrasensitive Environmental Monitoring: Highlights of Analytical Sciences in Switzerland
No full textUnveiling the Implicit: Arctic Coastal Aerosol Processes
Full text linkArctic coasts cover more than 101,000 km and emulsify terrestrial, marine and socio-economic ecosystems. All three components produce specific emissions that contribute to the mix of atmospheric constituents, which are processed and dispersed in the coastal atmosphere to contribute to cloud formation through cloud condensation nuclei and ice nucleating particles. Clouds strongly influence the coastal energy balance. Importantly, Arctic coastal ecosystems are exposed to multiple pressures such as the warming atmosphere and ocean, the thawing cryosphere and the expanding anthropogenic activities. This means that coastal emissions and atmospheric processes are in constant evolution. Given the large area covered by coasts and the mix of emission sources, coastal aerosol processes deserve quantification to better understand their role in accelerated Arctic climate change
Multiphase Chemistry in the Atmosphere
Full text linkEarth’s atmosphere comprises a complex mix of gas and condensed phases, where condensed phases facilitate multiphase chemical reactions that would not occur in the gas phase alone. These reactions drive dynamic physical and chemical processes across various spatial and temporal scales, playing a crucial role in the cycling of atmospheric trace constituents. Multiphase chemistry significantly influences geochemical cycles, human health, and climate. This review focuses on the chemical steps governing the cycling of important species, such as halogens, reactive nitrogen, and organics, within aerosol particles, a key type of atmospheric condensed phases, and at condensed phase–air interfaces. These interfaces include mineral oxides, ice, and aqueous solutions found in particulate matter, clouds, snow, and on oceanic and terrestrial surfaces. This review also discusses the important role of redox chemical cycling, the hydrogen bonding network and water activity in these processes
Intermolecular Interactions and their Implications in Solid-State Photon Interconversion
Full text linkPhoton interconversion promises to alleviate thermalization losses for high energy photons and facilitates utilization of sub-bandgap photons – effectively enabling the optimal use of the entire solar spectrum. However, for solid-state device applications, the impact of intermolecular interactions on the energetic landscape underlying singlet fission and triplet-triplet annihilation upconversion cannot be neglected. In the following, the implications of molecular arrangement, intermolecular coupling strength and molecular orientation on the respective processes of solid-state singlet fission and triplet-triplet annihilation are discussed