Spin crossover modulation in a coordination polymer with the redox-active bis-pyridyltetrathiafulvalene (py2TTF) ligand

2020 ◽  
Vol 56 (72) ◽  
pp. 10469-10472 ◽  
Author(s):  
Lisa Zappe ◽  
Sophie Schönfeld ◽  
Gerald Hörner ◽  
Katrina A. Zenere ◽  
Chanel F. Leong ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Spin Crossover ◽  
Redox Activity ◽  
Redox Active

A 1-D chain CP with both SCO and redox activity has been successfully prepared by the combination of a bis-pyridyl functionalised TTF core and a Schiff base-like N2O2 ligand.

scholarly journals Iron(II) Spin Crossover Coordination Polymers Derived From a Redox Active Equatorial Tetrathiafulvalene Schiff-Base Ligand

2021 ◽  
Vol 9 ◽  
Author(s):  
Ya-Ru Qiu ◽  
Long Cui ◽  
Jing-Yuan Ge ◽  
Mohamedally Kurmoo ◽  
Guijun Ma ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymers ◽  
Fluorescence Intensity ◽  
Schiff Base Ligand ◽  
Layered Structure ◽  
Spin Crossover ◽  
Spin Transition ◽  
Redox Activity ◽  
Transition Behavior ◽  
Redox Active

Two polymorphic FeII coordination polymers [FeIIL (TPPE)0.5] 1) and [(FeII3L3 (TPPE)1.5)] 2), were obtained from a redox-active tetrathiafulvalene (TTF) functionalized ligand [H2L = 2,2’-(((2-(4,5-bis-(methylthio)-1,3-dithiol-2-ylidene)benzo(d) (1,3) dithiole-5,6-diyl)bis-(azanediyl))bis-(meth anylylidene)) (2E,2E')-bis(3-oxobutanoate)] and a highly luminescent connector {TPPE = 1,1,2,2-tetrakis[4-(pyridine-4-yl)phenyl]-ethene}. Complex 1 has a layered structure where the TPPE uses its four diverging pyridines from the TPPE ligand are coordinated by the trans positions to the flat TTF Schiff-base ligand, and complex 2 has an unprecedented catenation of layers within two interpenetrated frameworks. These coordination polymers reserved the redox activity of the TTF unit. Complex 1 shows gradual spin transition behavior without hysteresis. And the fluorescence intensity of TPPE in 1 changes in tandem with the spin crossover (SCO) transition indicating a possible interplay between fluorescence and SCO behavior.

scholarly journals Probing the unpaired Fe spins across the spin crossover of a coordination polymer

2021 ◽  
Author(s):  
Thilini K. Ekanayaka ◽  
Hannah Kurz ◽  
Ashley S. Dale ◽  
Guanhua Hao ◽  
Aaron Mosey ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Spin State ◽  
Spin Crossover ◽  
State Transition ◽  
Spin State Transition

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.

Iron(II) Spin Crossover Complexes Based on a Redox Active Equatorial Schiff-Base-Like Ligand

2020 ◽  
Vol 59 (12) ◽  
pp. 8320-8333 ◽  
Author(s):  
Sophie Schönfeld ◽  
Katja Dankhoff ◽  
Dirk Baabe ◽  
Marc-Kevin Zaretzke ◽  
Martin Bröring ◽  
...  
Keyword(s):  
Schiff Base ◽  
Spin Crossover ◽  
Redox Active ◽  
Spin Crossover Complexes

scholarly journals Enhanced dielectricity coupled to spin-crossover in a one-dimensional polymer iron(ii) incorporating tetrathiafulvalene

2020 ◽  
Vol 11 (24) ◽  
pp. 6229-6235 ◽  
Author(s):  
Ya-Ru Qiu ◽  
Long Cui ◽  
Pei-Yu Cai ◽  
Fei Yu ◽  
Mohamedally Kurmoo ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Schiff Base ◽  
Room Temperature ◽  
Spin Crossover ◽  
One Dimensional ◽  
Redox Active ◽  
Crossover Transition

A concerted bending–flattening motion of the redox-active TTF within constructed one-dimensional FeII–TTF–Schiff-base chain with bridging 4,4′-bpy enhances the dielectric constant coupled to its spin-crossover transition above room temperature.

Spin-crossover in an iron(iii) complex showing a broad thermal hysteresis

2021 ◽  
Author(s):  
Cyril Rajnák ◽  
Romana Mičová ◽  
Ján Moncoľ ◽  
Ľubor Dlháň ◽  
Christoph Krüger ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Mononuclear Complex ◽  
Hysteresis Width ◽  
Thermally Induced

A pentadentate Schiff-base ligand 3,5Cl-L2− and NCSe− form a iron(iii) mononuclear complex [Fe(3,5Cl-L)(NCSe)], which shows a thermally induced spin crossover with a broad hysteresis width of 24 K between 123 K (warming) and 99 K (cooling).

A spin-crossover phenomenon in a 2D heterometallic coordination polymer with [Pd(SCN)4]2− building blocks

2021 ◽  
Vol 50 (12) ◽  
pp. 4152-4158
Author(s):  
Kai-Ping Xie ◽  
Si-Guo Wu ◽  
Long-Fei Wang ◽  
Guo-Zhang Huang ◽  
Zhao-Ping Ni ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Building Blocks ◽  
Two Dimensional ◽  
Heterometallic Coordination Polymer

The first spin-crossover example of a two-dimensional coordination polymer containing [Pd(SCN)4]2− building blocks was explored.

Cd(II) coordination polymer of fumaric acid and pyridyl-hydrazide Schiff base: Structure, photoconductivity and theoretical interpretation

2021 ◽  
Vol 518 ◽  
pp. 120253
Author(s):  
Angeera Chandra ◽  
Dhananjoy Das ◽  
Joaquín-Ortega Castro ◽  
Kaushik Naskar ◽  
Srikanta Jana ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Fumaric Acid ◽  
Theoretical Interpretation ◽  
Base Structure
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