On July 08, 2026, a member of the editorial board of the journal “Chemical Problems” an outstanding scientist, academician, doctor of technical sciences, and professor who made essential contributions to the development of chemical science Ajdar Majidov died. The editor-in-chief and members of the journal editorial board mourn A. Majidov and sincerely condole his family. The bright memory of Ajdar Majidov will forever remain in our hearts.