Molecular memory near room temperature in an iron polyanionic complex

Two-Dimensional Coordination Polymer Showing Spin-Crossover Behavior with a 64 K Wide Hysteresis Loop

“…One is typically for discrete systems that are realized through intermolecular π···π interactions and hydrogen bonds, in which W hys values of 60 and 70 K have been obtained. , Another is mainly for coordination polymers (CPs) by using short bridging ligands to propagate and accumulate synergetic effect, − which can effectively enlarge the W hys values. The second method has been well documented in Fe­(II)-1,2,4-triazole SCO CPs − and Hofmann-type SCO materials. , In addition, we notice that 2D SCO CPs formed with rigid bis-monodentate ligands have the potential to show relatively large W hys values in a unconventional way . For example, [Fe­(NCS) 2 (4,4′-bis-1,2,4-triazole) 2 ]·H 2 O showed SCO behavior with a W hys value of 21 K, which had been attributed to the rotation of the triazole plane. , However, to our knowledge, all 2D SCO Fe­(II) CPs exhibited W hys values that were up to date less than 50 K, no matter how to achieve by means of temperature variation, solvent induction, light irradiation, pressure, and downsizing, etc. − In this paper, we report a 2D CP that shows one-step complete SCO behavior with unexpectedly large W hys value of 64 K, and additionally this CP also shows temperature-induced excited spin-state trapping effect (TIESST) with the T TIESST value equal to 91 K.…”

Bistable Spin‐Crossover Nanoparticles for Molecular Electronics

“…In this sense, a recent report has demonstrated that an anionic iron‐triazole complex can exhibit a memory effect at RT even at the single‐molecule level without the need of any cooperative effect. [ 98 ] This paradigmatic shift may open new possibilities in the design of single‐molecule SCO memory devices.…”

The resolution of the weak-exchange limit made rigorous, simple and general in binuclear complexes

“…Recent decades witnessed significant advancements in the engineering of single-molecule magnets (SMMs) with compelling magnetic properties closer and closer to room temperature. [1][2][3][4] At stake may be the future of storage devices and quantum information systems, [5][6][7] but these SMMs also provide a playground to explore complex electronic structures, and new quantum-mechanical phenomena, [8][9][10] and develop novel strategies for evaluating them.…”