Manipulating fluorescence by photo-switched spin-state conversions in an iron(ii)-based SCO-MOF

Abstract

Manipulating fluorescence by photo-switched spin-state conversions is an attractive prospect for applications in smart magneto-optical materials and devices. The challenge is how to modulate the energy transfer paths of the...

Hysteretic magnetism–dielectricity switching in 2D Hofmann type spin-crossover compounds

“…In contrast, for some Fe II HS materials, excitation around 860 nm induced a low-spin excited state (LS*), which then decays kinetically to the LS* state within 40 ps. 50–53 Therefore, the UV-Vis spectra provided valuable insights for photomagnetic studies.…”

Spin-crossover tuning of the luminescence in 2D Hofmann-type compounds in bulk and exfoliated flakes

“…Among them, luminescent Hofmann-like CPs have been prepared following two strategies: (i) the use of a fluorophore as pillaring ligand and (ii) the inclusion of a fluorescent guest into the cavities of the network. 13–15,17–19…”

Simultaneous magneto-dielectric transitions in a fluorescent Hofmann-type coordination polymer

“…Fe II -based SCO materials exhibiting thermal- and photo-switchable fluorescence emission properties have also been reported. 29–31 Given that researchers have obtained good results in the construction of SCO-based bifunctional complexes, the SCO unit makes it possible to build a coupling relationship between fluorescence and dielectric properties, which is of great significance for understanding the interplay between different physical properties. To this end, the integration of functional building blocks and precise manipulation of their assembly are both crucial for the design and construction of SCO-based materials with coupled fluorescence and dielectric properties.…”

“…More importantly, Hofmann-type SCO-MOFs based on [M(CN) 2 ] − (M I = Ag, Au) essentially exhibit the synergistic fluorescence-SCO property and photo-switchable fluorescence emission property, which have potential applications in fluorescence thermometry and magneto-optical switching. 29,31 For the functional ligand, we chose a strong luminophore tetraphenylethylene (TPE) as the central fluorescent unit. 13,40,41 Two pyridyl groups are grafted onto the TPE, resulting in the ditopic bridging ligand 1,1-diphenyl-2,2-di(4-pyridylbiphenyl)ethylene (DPPE) with strong fluorescence emission at 468 nm in a solid.…”