Per capire la portata dei negoziati della COP26 di Glasgow, che entrano ora nella seconda settimana, è necessario riflettere quanto superare la soglie di 1,5°C o di 2°C possa generare punti di non ritorno o meno nel nostro sistema climatico, ma anche quanto i modelli climatici possano aiutare per pianificare azioni di mitigazione e adattamento e, infine, che ruolo hanno le nuove tecnologie in tutto questo. Ne abbiamo parlato con Claudia Tebaldi, statistica al Joint Global Change Research Institute (PNNL), collaboratrice di Climate Central, e autrice principale del primo volume del sesto rapporto IPCC uscito in estate.
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Le voci della scienza - Podcast
Impatti, modelli e tecnologia per capire la COP26 di Glasgow
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Discovered a New Carbon-Carbon Chemical Bond
A group of researchers from Hokkaido University has provided the first experimental evidence of the existence of a new type of chemical bond: the single-electron covalent bond, theorized by Linus Pauling in 1931 but never verified until now. Using derivatives of hexaarylethane (HPE), the scientists were able to stabilize this unusual bond between two carbon atoms and study it with spectroscopic techniques and X-ray diffraction. This discovery opens new perspectives in understanding bond chemistry and could lead to the development of new materials with innovative applications.
In the cover image: study of the sigma bond with X-ray diffraction. Credits: Yusuke Ishigaki
After nearly a year of review, on September 25, a study was published in Nature that has sparked a lot of discussion, especially among chemists. A group of researchers from Hokkaido University synthesized a molecule that experimentally demonstrated the existence of a new type of chemical bond, something that does not happen very often.