I premi Nobel per la fisica di quest'anno sono stati conferiti a due climatologi, Syukuro Manabe e Klaus Hasselmann, e a un fisico teorico, Giorgio Parisi. In entrambi i casi, è stata premiata la fisica dei sistemi complessi, come quella che descrive gli storni di rondine o i vetri di spin, ma anche la nostra atmosfera e biosfera. Premiare due climatologi assieme a un fisico teorico contribuisce sicuramente ad accrescere l'autorevolezza della scienza del clima; d'altra parte, lo stesso Parisi ha dimostrato una forte sensibilità in tema, rilasciando dichiarazioni e interventi sull'importanza della lotta ai cambiamenti climatici.
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Le voci della scienza - Podcast
Il Nobel per la fisica 2021 consacra la scienza del clima
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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.