“…In comparison to other types of possible molecular switches (Boonprab et al, 2019;Hayami et al, 2001), SCO transition-metal complexes based on Fe II can easily switch between high-spin (HS, S = 2) and low-spin (LS, S = 0) states under external perturbation, such as temperature, physical and chemical pressure, or magnetic or electrical switching (Trzop et al, 2016;Zhang et al, 2017Zhang et al, , 2018Lan et al, 2019;Jin et al, 2019;Ide et al, 2017;Hayami et al, 2001;Pavlik et al, 2020;Kahn & Martinez, 1998;Murphy et al, 2017), and thus show great potential applications in memory devices, sensors, etc. (Turanova et al, 2020;Kahn & Martinez, 1998).…”