An international research consortium has developed an innovative heterogeneous single-atom copper photocatalyst supported on functionalized graphitic carbon nitride (Cu@f-gC3N4). The study, published in the journal Nature Communications, describes an efficient methodology for the selective N-demethylation of aliphatic and aromatic tertiary amines. Operating under exceptionally mild conditions with visible-light irradiation, the system utilizes molecular oxygen as […]
Read MoreA calendar from the year 813 discovered in Florence that corrects the gap between the Julian calendar and the solar year
- Comments off
A calendar created in 813 has been rediscovered in Florence, where the discrepancy between the Julian calendar and the solar year is already corrected. This discovery predates the full recognition of this phenomenon by more than seven centuries, which was only formalized with the Gregorian Reform of 1582. The discovery is the result of a […]
Read More