scholarly journals Reversible redox switching of magnetic order and electrical conductivity in a 2D manganese benzoquinoid framework

2019 ◽  
Vol 10 (17) ◽  
pp. 4652-4661 ◽  
Author(s):  
Lujia Liu ◽  
Jordan A. DeGayner ◽  
Lei Sun ◽  
David Z. Zee ◽  
T. David Harris
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Order ◽  
Reversible Redox ◽  
Redox Switching

We report a 2D manganese benzoquinoid network that undergoes simultaneous redox switching of magnetic order and electrical conductivity.

scholarly journals Reversible redox switching of magnetic order and electrical conductivity in a 2D manganese benzoquinoid framework

2020 ◽  
Author(s):  
Lujia Liu
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Single Crystal ◽  
Magnetic Order ◽  
Magnetic Measurements ◽  
Fold Increase ◽  
Parent Material ◽  
Formidable Challenge ◽  
Redox Switching ◽  
Magnetic And Electrical Properties

© 2019 The Royal Society of Chemistry. Materials with switchable magnetic and electrical properties may enable future spintronic technologies, and thus hold the potential to revolutionize how information is processed and stored. While reversible switching of magnetic order or electrical conductivity has been independently realized in materials, the ability to simultaneously switch both properties in a single material presents a formidable challenge. Here, we report the 2D manganese benzoquinoid framework (Me4N)2[MnII2(L2-)3] (H2L = 2,5-dichloro-3,6-dihydroxo-1,4-benzoquinone), as synthesized via post-synthetic counterion exchange. This material is paramagnetic above 1.8 K and exhibits an ambient-temperature electrical conductivity of σ295 K = 1.14(3) × 10-13 S cm-1 (Ea = 0.74(3) eV). Upon soaking in a solution of sodium naphthalenide and 1,2-dihydroacenaphthylene, this compound undergoes a single-crystal-to-single-crystal (SC-SC) reduction to give Na3(Me4N)2[Mn2L3]. Structural and spectroscopic analyses confirm this reduction to be ligand-based, and as such the anionic framework is formulated as [MnII2(L3-)3]5-. Magnetic measurements confirm that this reduced material is a permanent magnet below Tc = 41 K and exhibits a conductivity value of σ295 K = 2.27(1) × 10-8 S cm-1 (Ea = 0.489(8) eV), representing a remarkable 200 000-fold increase over the parent material. Finally, soaking the reduced compound in a solution of [Cp2Fe]+ affords Na(Me4N)[MnII2(L2-)3] via a SC-SC process, with magnetic and electrical properties similar to those observed for the original oxidized material. Taken together, these results highlight the ability of metal benzoquinoid frameworks to undergo reversible, simultaneous redox switching of magnetic order and electrical conductivity.

scholarly journals Reversible redox switching of magnetic order and electrical conductivity in a 2D manganese benzoquinoid framework

2020 ◽  
Author(s):  
Lujia Liu
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Single Crystal ◽  
Magnetic Order ◽  
Magnetic Measurements ◽  
Fold Increase ◽  
Parent Material ◽  
Formidable Challenge ◽  
Redox Switching ◽  
Magnetic And Electrical Properties

© 2019 The Royal Society of Chemistry. Materials with switchable magnetic and electrical properties may enable future spintronic technologies, and thus hold the potential to revolutionize how information is processed and stored. While reversible switching of magnetic order or electrical conductivity has been independently realized in materials, the ability to simultaneously switch both properties in a single material presents a formidable challenge. Here, we report the 2D manganese benzoquinoid framework (Me4N)2[MnII2(L2-)3] (H2L = 2,5-dichloro-3,6-dihydroxo-1,4-benzoquinone), as synthesized via post-synthetic counterion exchange. This material is paramagnetic above 1.8 K and exhibits an ambient-temperature electrical conductivity of σ295 K = 1.14(3) × 10-13 S cm-1 (Ea = 0.74(3) eV). Upon soaking in a solution of sodium naphthalenide and 1,2-dihydroacenaphthylene, this compound undergoes a single-crystal-to-single-crystal (SC-SC) reduction to give Na3(Me4N)2[Mn2L3]. Structural and spectroscopic analyses confirm this reduction to be ligand-based, and as such the anionic framework is formulated as [MnII2(L3-)3]5-. Magnetic measurements confirm that this reduced material is a permanent magnet below Tc = 41 K and exhibits a conductivity value of σ295 K = 2.27(1) × 10-8 S cm-1 (Ea = 0.489(8) eV), representing a remarkable 200 000-fold increase over the parent material. Finally, soaking the reduced compound in a solution of [Cp2Fe]+ affords Na(Me4N)[MnII2(L2-)3] via a SC-SC process, with magnetic and electrical properties similar to those observed for the original oxidized material. Taken together, these results highlight the ability of metal benzoquinoid frameworks to undergo reversible, simultaneous redox switching of magnetic order and electrical conductivity.

scholarly journals In situ reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes

2019 ◽  
Vol 21 (21) ◽  
pp. 11079-11086 ◽  
Author(s):  
C. Karthika ◽  
S. R. Sarath Kumar ◽  
L. Kathuria ◽  
P. K. Das ◽  
A. G. Samuelson
Keyword(s):  
Ruthenium Complexes ◽  
First Hyperpolarizability ◽  
Bimetallic Complex ◽  
Reversible Redox ◽  
Redox Switching

Reversible redox switching of first hyperpolarizability of Monometallic and bimetallic complex.

Reversible redox switching in polypyrrole and poly-SNS films

1997 ◽  
Vol 84 (1-3) ◽  
pp. 183-184 ◽  
Author(s):  
T.F. Otero ◽  
S. Villanueva ◽  
M. Bengoechea ◽  
E. Brillas ◽  
J. Carrasco
Keyword(s):  
Reversible Redox ◽  
Redox Switching

Reversible Redox Switching of Concurrent Luminescence and Visual Color Change Based on Lanthanide Metallogel

Langmuir ◽  
2019 ◽  
Vol 35 (47) ◽  
pp. 15344-15351 ◽  
Author(s):  
Qi Zhou ◽  
Xuelin Dong ◽  
Jianhui Yuan ◽  
Binbin Zhang ◽  
Shan Lu ◽  
...  
Keyword(s):  
Color Change ◽  
Reversible Redox ◽  
Visual Color ◽  
Redox Switching

scholarly journals Chiroptical inversion of a planar chiral redox-switchable rotaxane

2019 ◽  
Vol 10 (43) ◽  
pp. 10003-10009 ◽  
Author(s):  
Marius Gaedke ◽  
Felix Witte ◽  
Jana Anhäuser ◽  
Henrik Hupatz ◽  
Hendrik V. Schröder ◽  
...  
Keyword(s):  
Crown Ether ◽  
Dft Calculations ◽  
Sign Reversal ◽  
Main Band ◽  
Reversible Redox ◽  
Redox Switching

Reversible redox-switching of a planar chiral [2]rotaxane with a tetrathiafulvalene-bearing crown ether macrocycle generates a complete sign reversal of the main band in the ECD spectrum, as shown by experiment and rationalised by DFT calculations.

scholarly journals Synthesis of Bis{meso-Tetrakis(4-N-alkylpyridiniumyl)porphyrinato}cerium and Its Redox Switching Behavior

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 790
Author(s):  
Toshio Nishino ◽  
Yasuyuki Yamada ◽  
Ayumi Yamamoto ◽  
Kentaro Tanaka
Keyword(s):  
Organic Solvent ◽  
Redox Reaction ◽  
Electrochemical Measurements ◽  
Switching Behavior ◽  
Porphyrin Complex ◽  
Double Decker ◽  
Reversible Redox ◽  
Redox Switching

A novel double-decker porphyrin complex, bis{meso-tetrakis(4-N-alkylpyridiniumyl)porphyrinato}cerium, was prepared. Electrochemical measurements revealed that this complex exhibited reversible redox waves corresponding to a 1e– redox reaction of the cerium center. Treating the complex alternately with an oxidant and a reductant resulted in the reversible redox switching between the oxidized and reduced states in an organic solvent.

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