scholarly journals Thermo- and photo-modulation of exciplex fluorescence in a 3D spin crossover Hofmann-type coordination polymer

2018 ◽  
Vol 9 (44) ◽  
pp. 8446-8452 ◽  
Author(s):  
Teresa Delgado ◽  
Manuel Meneses-Sánchez ◽  
Lucía Piñeiro-López ◽  
Carlos Bartual-Murgui ◽  
M. Carmen Muñoz ◽  
...  

Inclusion of pyrene in the pores of a 3D iron(ii) spin-crossover Hofmann-type material allows thermal and light-induced ON–OFF switching of the resulting exciplex luminescence and provides an analytical tool to control the spin-state of the iron(ii) nodes.

2021 ◽  
Author(s):  
Thilini K. Ekanayaka ◽  
Hannah Kurz ◽  
Ashley S. Dale ◽  
Guanhua Hao ◽  
Aaron Mosey ◽  
...  

For the spin crossover coordination polymer [Fe(L1)(bipy)]n (where L1 is a N2O22− coordinating Schiff base-like ligand bearing a phenazine fluorophore and bipy = 4,4′-bipyridine), there is compelling additional evidence of a spin state transition.


2017 ◽  
Vol 8 (1) ◽  
pp. 701-707 ◽  
Author(s):  
Natasha F. Sciortino ◽  
Katrina A. Zenere ◽  
Maggie E. Corrigan ◽  
Gregory J. Halder ◽  
Guillaume Chastanet ◽  
...  

A rare four-step spin crossover transition has been attained in a two-dimensional Hofmann-type material through the presence of an array of antagonistic host–host and host–guest interactions.


2018 ◽  
Vol 140 (2) ◽  
pp. 700-709 ◽  
Author(s):  
Charles Lochenie ◽  
Konstantin Schötz ◽  
Fabian Panzer ◽  
Hannah Kurz ◽  
Bernadette Maier ◽  
...  

2019 ◽  
Author(s):  
Yan-Cong Chen ◽  
Yan Meng ◽  
Jiří Tuček ◽  
Yan-Jie Dong ◽  
Xiao-Wei Song ◽  
...  

Among the responsive multistable materials, spin crossover (SCO) systems are of particular interest for stabilizing multiple spin states with various stimulus inputs and physical outputs. Here in a 2D Hofmann-type coordination polymer [Fe(isoq)<sub>2</sub>{Au(CN)<sub>2</sub>}<sub>2</sub>] (isoq = isoquinoline), hidden multistability of the spin state is accessed by introducing an medium-temperature annealing after a light/temperature stimulation. With the combined effort of magnetic, crystallographic and Mössbauer spectral investigation, these distinct spin states are identified and the light- and temperature-assisted transition pathways are clarified. Such excitation-relaxation and trapping-relaxation joint mechanisms, as ingenious interplays between the kinetic and thermodynamic effects, uncover hidden possibilities for the discovery of multistable materials and the development of multistate intelligent devices.


2017 ◽  
Vol 17 (5) ◽  
pp. 2736-2745 ◽  
Author(s):  
Daopeng Zhang ◽  
Elzbieta Trzop ◽  
Francisco J. Valverde-Muñoz ◽  
Lucía Piñeiro-López ◽  
M. Carmen Muñoz ◽  
...  

Author(s):  
Thilini K. Ekanayaka ◽  
Hannah Kurz ◽  
Kayleigh A. McElveen ◽  
Guanhua Hao ◽  
Esha Mishra ◽  
...  

From X-ray absorption spectroscopy (XAS) and X-ray photoemission spectroscopy (XPS) it is evident that the spin state transition behavior of Fe(ii) spin crossover coordination polymer crystallites at the surface differs from the bulk.


2020 ◽  
Vol 11 (12) ◽  
pp. 3281-3289 ◽  
Author(s):  
Yan-Cong Chen ◽  
Yan Meng ◽  
Yan-Jie Dong ◽  
Xiao-Wei Song ◽  
Guo-Zhang Huang ◽  
...  

Two new two-stage manipulation protocols, namely light- and temperature-assisted spin state annealing (LASSA/TASSA), are applied to a spin crossover coordination polymer, [Fe(isoq)2{Au(CN)2}2], revealing the hidden multistability of spin states.


2019 ◽  
Author(s):  
Yan-Cong Chen ◽  
Yan Meng ◽  
Jiří Tuček ◽  
Yan-Jie Dong ◽  
Xiao-Wei Song ◽  
...  

Among the responsive multistable materials, spin crossover (SCO) systems are of particular interest for stabilizing multiple spin states with various stimulus inputs and physical outputs. Here in a 2D Hofmann-type coordination polymer [Fe(isoq)<sub>2</sub>{Au(CN)<sub>2</sub>}<sub>2</sub>] (isoq = isoquinoline), hidden multistability of the spin state is accessed by introducing an medium-temperature annealing after a light/temperature stimulation. With the combined effort of magnetic, crystallographic and Mössbauer spectral investigation, these distinct spin states are identified and the light- and temperature-assisted transition pathways are clarified. Such excitation-relaxation and trapping-relaxation joint mechanisms, as ingenious interplays between the kinetic and thermodynamic effects, uncover hidden possibilities for the discovery of multistable materials and the development of multistate intelligent devices.


2021 ◽  
Vol 50 (10) ◽  
pp. 3464-3467
Author(s):  
Rafal Kulmaczewski ◽  
Mark J. Howard ◽  
Malcolm A. Halcrow

The temperature of the solution-phase spin-crossover equilibrium in iron(ii) complexes of 4-alkylsulfanyl-2,6-di{pyrazol-1-yl}pyridine (bppSR) complexes depends strongly on the alkylsulfanyl substituent.


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