Synergistic strategies for the synthesis of Fe(ii)-based bifunctional fluorescent spin-crossover materials

Abstract

Spin-crossover (SCO) materials have been extensively investigated in the past decades, with promising applications in wide fields including displays, sensors, and storage components. The introduction of secondary physical properties to...

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

“…This may be caused by the fact that the Förster resonance energy transfer efficiency from the TPE fluorophore to the metal-centered charge transfer bands is not high enough to make up for the fluorescence quenching caused by thermal agitation. 27,28 Meanwhile, the luminescence decay experiments were conducted. The lifetime values of DPPE and complex 1 in the solid at room temperature are 2.26 and 2.13 ns, respectively (Fig.…”

“…[21][22][23][24][25][26] The coupling mechanism in the SCO-fluorescence complexes is known as the Förster resonance energy transfer (FRET). 27,28 This requires the spatial arrangement of the SCO unit and fluorophore, wherein the spectral overlap degree varies between the absorption bands of the SCO unit and emission bands of the fluorophore upon spin state transition. Fe II -based SCO materials exhibiting thermal-and photo-switchable fluorescence emission properties have also been reported.…”

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

“…[27][28][29][30][31] Recent studies have proven that the uorescence intensity of SCO complexes can be effectively modulated by spin-state conversions. [32][33][34][35][36][37][38][39] The uorophore acts as a photosensitizer responsible for absorbing photons and emitting uorescence, while the SCO unit is a better energy acceptor. When a coupling path is built between them, the energy transfer efficiency from the uorophores to metal ions will be different for the HS and LS states due to the varied overlaps of emission bands of the ligand and absorption bands of the metal ion.…”

Hysteretic Spin Crossover with High Transition Temperatures in Two Cobalt(II) Complexes

“…As one of the most important molecular magnetic materials with switchable magnetic properties, spin crossover (SCO) materials have been attracting intense attention. , The rearrangement of the electrons within the nonbonding t 2g and antibonding e g orbitals of the SCO materials can not only switch the spin state between the low spin (LS) and high spin (HS) states but also lead to modifications of physical properties through the application of external perturbations (such as pressure, magnetic and electric field, light irradiation, and guest molecules) and applications in areas such as display and memory, electrical, luminescent, and mechanical actuators. − …”