“…Ferrocene [Fe(Z 5 -C 5 H 5 ) 2 ] (FcH), the iconic organometallic complex discovered 70 years ago, [1][2][3][4][5] displays exceptional properties, 6 and research on ferrocene and its derivatives continues to demonstrate great interest and vitality. [7][8][9] Indeed, ferrocene is fascinating due to its stability under aerobic, moist and photochemical conditions, its thermodynamic robustness, its unique structural properties such as adequate rigidity and steric bulkiness, its easy derivatization, 10,11 and its remarkable redox properties, 3,12,13 endowing ferrocene and its derivatives numerous applications in a wide range of fields, including catalysis, 14 sensing, 15,16 batteries, 17 medicinal chemistry, [18][19][20] and teranostics. 21 Ferrocene has also been explored as an appealing building block in the construction of organometallic chromophores, including asymmetric multidentate ferrocene functionalized Schiff bases and their metal complexes, 22 with tunable and switchable properties relevant to a wide variety of materials-related applications.…”