Publications by authors named "Ashley T Brennan"
We probe, here, a family of 2D Hofmann-type frameworks, [Fe(Pd(CN))(bztrzX)]·HO [·HO; X = F, Cl, Br; = 1 (X = Cl, Br) and 3 (X = F); bztrzX = ()-1-(2-Xphen-1-yl)--(4-1,2,4-triazol-4-yl)methanimine], with halogen-appended ligands. In all cases, there are two crystallographically distinct Fe sites, ({Fe1-Fe2}), driven by the presence of a range of host-host and host-guest interactions. We find that lattice modification through X variation influences the elastic coupling between the Fe sites, the emergence of ferroelastic or antiferroelastic interactions between these sites, and the relative spin-state stabilization/destabilization at each site.
View Article and Find Full Text PDFArticle Synopsis
- - The study examines how halogen functionalization affects the spin crossover (SCO) properties in a family of 2-D Hofmann framework materials containing iron and palladium, focusing on versions that use chlorine and bromine.
- - The presence of chlorine and bromine causes a blockage in the spin-state transitions due to the steric bulk from the halogen atoms and other guest molecules, although SCO can still occur with guest removal or physical pressure.
- - Removal of water from these frameworks results in stable structures with only slight changes, while applying pressure (above 0.62 GPa) can induce SCO in the solvated forms, leading to a shift in transition temperatures among the different versions of the materials studied.