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|Title:||Guest-Induced Multistep to Single-Step Spin-Crossover Switching in a 2-D Hofmann-Like Framework with an Amide-Appended Ligand|
|Citation:||Inorganic Chemistry: including bioinorganic chemistry, 2022; 61(30):11667-11674|
|Publisher:||American Chemical Society (ACS)|
|Manan Ahmed, Kasun S. A. Arachchige, Zixi Xie, Jason R. Price, Jace Cruddas, Jack K. Clegg, Benjamin J. Powell, Cameron J. Kepert, and Suzanne M. Neville|
|Abstract:||A detailed study of the two-dimensional (2-D) Hofmann like framework [Fe(furpy)2Pd(CN)4]·nG (furpy: N-(pyridin-4-yl)furan-2- carboxamide, G = H2O,EtOH (A·H2O,Et), and H2O (A·H2O)) is presented, including the structural and spin-crossover (SCO) implications of subtle guest modification. This 2-D framework is characterized by undulating Hofmann layers and an array of interlayer spacing environments --this is a strategic approach that we achieve by the inclusion of a ligand with multiple host−host and host−guest interaction sites. Variable temperature magnetic susceptibility studies reveal an asymmetric multistep SCO for A·H2O,Et and an abrupt single-step SCO for A·H2O with an upshift in transition temperature of ∼75 K. Single-crystal analyses show a primitive orthorhombic symmetry for A·H2O,Et characterized by a unique FeII centers the multistep SCO character is attributed to local ligand orientation. Counterintuitively, A·H2O shows a triclinic symmetry with two inequivalent FeII centers that undergo a cooperative single-step high-spin (HS)-to-low-spin (LS) transition. We conduct detailed structure−function analyses to understand how the guest ethanol influences the delicate balance between framework communication and, therefore, the local structure and spin-state transition mechanism.|
|Rights:||© 2022 American Chemical Society|
|Appears in Collections:||Chemistry publications|
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