scholarly journals Four-step iron(ii) spin state cascade driven by antagonistic solid state interactions

2017 ◽  
Vol 8 (1) ◽  
pp. 701-707 ◽  
Author(s):  
Natasha F. Sciortino ◽  
Katrina A. Zenere ◽  
Maggie E. Corrigan ◽  
Gregory J. Halder ◽  
Guillaume Chastanet ◽  
...  
Keyword(s):  
Solid State ◽  
Spin State ◽  
Spin Crossover ◽  
Type Material ◽  
Two Dimensional ◽  
Crossover Transition

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.

Thermal Spin Crossover Behaviour of Two-Dimensional Hofmann-Type Coordination Polymers Incorporating Photoactive Ligands

2014 ◽  
Vol 67 (11) ◽  
pp. 1563 ◽  
Author(s):  
Florence Ragon ◽  
Korcan Yaksi ◽  
Natasha F. Sciortino ◽  
Guillaume Chastanet ◽  
Jean-François Létard ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Analysis ◽  
Spin State ◽  
Coordination Polymers ◽  
Spin Crossover ◽  
Pore Space ◽  
Free Ligand ◽  
Two Dimensional ◽  
Framework Materials ◽  
Active Isomer

Two spin crossover (SCO)-active 2D Hofmann-type framework materials, [Fe(3-PAP)2Pd(CN)4] (A) and [Fe(4-PAP)2Pd(CN)4] (B) containing the photoactive azo-benzene-type ligands 3-phenylazo-pyridine (3-PAP) and 4-phenylazo-pyridine (4-PAP) were prepared. These materials form non-porous Hofmann-type structures whereby 2D [FeIIPd(CN)4] grids are separated by 3- or 4-PAP ligands. The iron(ii) sites of both materials (A and B) undergo abrupt and hysteretic spin transitions with characteristic transition temperatures T1/2↓,↑: 178, 190 K (ΔT: 12 K) and T1/2↓,↑: 233, 250 K (ΔT: 17 K), respectively. Photo-magnetic characterisations reveal light-induced excited spin state trapping (LIESST) activity in both A and B with characteristic T(LIESST) values of 45 and 40 K. Although both free ligands show trans- to-cis isomerisation in solution under UV-irradiation, as evidenced via absorption spectroscopy, such photo-activity was not observed in the ligands or complexes A and B in the solid state. Structural analysis of a further non-SCO active isomer to B, [Fe(4-PAP)2Pd(CN)4]·1/2(4-PAP) (B·(4-PAP)), which contains free ligand in the pore space is reported.

ChemInform Abstract: Dynamics of Spin-State Interconversion and Cooperativity for Ferric Spin-Crossover Complexes in the Solid State.

1986 ◽  
Vol 17 (23) ◽  
Author(s):  
M. D. TIMKEN ◽  
C. E. STROUSE ◽  
S. M. SOLTIS ◽  
S. A. DAVERIO ◽  
D. N. HENDRICKSON ◽  
...  
Keyword(s):  
Solid State ◽  
Spin State ◽  
Spin Crossover ◽  
Spin Crossover Complexes

Spin state variability in Fe2+ complexes of substituted (2-(pyridin-2-yl)-1,10-phenanthroline) ligands as versatile terpyridine analogues

2017 ◽  
Vol 46 (19) ◽  
pp. 6218-6229 ◽  
Author(s):  
Holm Petzold ◽  
Paul Djomgoue ◽  
Gerald Hörner ◽  
Silvio Heider ◽  
Charles Lochenie ◽  
...  
Keyword(s):  
Solid State ◽  
Spin State ◽  
In Silico ◽  
Spin Crossover ◽  
Spin Crossover Complexes ◽  
Phenanthroline Ligands

Fe2+ spin crossover complexes [Fe(L)2]2+ (L = substituted (pyridin-2-yl)-1,10-phenanthroline) were prepared and SCO properties were investigated in solution and in the solid state by an experiment and in silico.

Vapor-triggered Reversible Crystal Transformation in Nickel-based Magnetic Molecular Switch

2022 ◽  
Author(s):  
Shufang Xue ◽  
Gideon F.B Solre ◽  
Xiaoqin Wang ◽  
Liang Wang ◽  
Yunnan Guo
Keyword(s):  
Solid State ◽  
Coordination Polymer ◽  
Spin State ◽  
Molecular Switch ◽  
Trinuclear Complex ◽  
Two Dimensional ◽  
Crystal Transformation ◽  
State Coordination

Vapor-trigged crystal to crystal transformation between a discrete trinuclear complex [Ni3(sih)2(py)8] and a two-dimensional (2D) coordination polymer [Ni3(sih)2(py)2]n·DMF·H2O was demonstrated. It provides an example of solid-state coordination induced spin state...

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