 Photochromic switches that can transmit information quickly have become increasingly popular in materials science, over the past few decades. While some photochromic materials can switch in under 100 of nanoseconds using other chromophores like spiroperons, achieving this speed for azobenzines remains challenging. This review discusses the latest advances in azobenzines, focusing on their structural features and how they relate to the thermal sister trans-isomerization process. Additionally, the kinetics and mechanisms behind the thermal back-isomerization are explored as a way to achieve faster azod derivatives. This article was authored by Hame Garci Amaros and Dolores Belasco.