Proton-driven coordination-induced spin state switch (PD-CISSS) of iron(<scp>ii</scp>) complexes

Nowak, René; Prasetyanto, Eko Adi; Cola, Luisa De; Bojer, Beate; Siegel, Renée; Senker, Jürgen; Rössler, E. A.; Weber, Birgit

doi:10.1039/c6cc08618g

Cited by 54 publications

(45 citation statements)

References 29 publications

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“…In this system, the mechanical motion of the ligand is triggered by a combination of a chemical stimulus (pH) and temperature. The effect was observed in solution and as composite materials encapsulated in the supercages of zeolite faujasite NaY [59]. the protonated nitrogen of the bipy ligands, resulting in a HS pentacoordinated Fe(II) complex upon heating.…”

Section: Spin State Change By Coordination Number Modulationmentioning

confidence: 90%

Switching Magnetic Properties by a Mechanical Motion

et al. 2018

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Switching magnetic properties have attracted a wide interest from inorganic chemist for the objectives of information storage and quantum computing at the molecular level. This review is focused on magnetic switches based on a mechanical motion, which is an innovative approach. Three main strategies to control magnetic properties by a mechanical motion have been developed in the literature and will be described. The first one (ligand-induced spin change) consists in modulating the ligand field strength by a configuration change of the ligand in spin-crossover complexes. The second one (coordination-induced spin-state switching) is based on a change in the coordination number of a metallic center that is triggered by the motion of one ligand. The third one uses the modulation of the exchange interaction between two spin-centers by a mechanical motion.

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Section: Spin State Change By Coordination Number Modulationmentioning

confidence: 90%

Switching Magnetic Properties by a Mechanical Motion

et al. 2018

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“…These materials can be switched between those two states by aw ide variety of different stimuli.T he SCO can be either driven by ac hange of physicalp arameters such as pressure, temperature, electromagnetic irradiation, or by ac hemical stimulus (e.g.,h ost-guest interactions or pH). [20] This switching ability in combination with the associated changes in the chemicala nd physicalp roperties( color,m agnetism) is of high interestf or applications in sensors, [21] display devices, [22] or as functional contrast agents. [23] Af urthera dvantage especially of SCO materials is the possibility to combine the SCO with additional changes,f or example, as witching of the fluorescence properties [24,25] to generate af urtherr ead-out option.…”

Section: Spin Crossover Nanoparticlesmentioning

confidence: 99%

Synthesis of Coordination Polymer Nanoparticles using Self‐Assembled Block Copolymers as Template

Weber

2017

Chemistry A European J

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Nowadays there is a high demand in specialized functional materials, for example, for applications as sensors in biomedicine. For the realization of such applications, nanostructures and the integration in a composite matrix are indispensable. Coordination polymers and networks, for example, with spin crossover properties, are a highly promising family of switchable materials in which the switching process can be triggered by various external stimuli. An overview over different strategies for the synthesis of nanoparticles of such systems is given. A special focus is set on the use of block copolymer micelles as templates for the synthesis of nanocomposites. The block copolymer defines the final size and shape of the nanoparticle core. Additionally it allows a further functionalization of the obtained nanoparticles by variation of the polymer blocks and an easy deposition of the composite material on surfaces.

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“…This solution was split in aliquots and the dark purple iron(III) complexes were precipitated with an aqueous solution of the desired anion. For comparison purpose, the pair [Fe(bipy) 3 ]Cl 2 · 2H 2 O ( 16 ) and [Fe(bipy) 3 ](PF 6 ) 3 · 2H 2 O ( 17 ) was synthesized as well following literature procedures , . The two complexes with bipy as neutral, bidentate ligand were obtained as dark blue ( 17 ) and pink ( 16 ) powder.…”

Section: Resultsmentioning

confidence: 99%

“…An overview of the SCO behavior of the complexes with the χ M T values at 300 and 50 K is given in Table . The compilation is completed with the data obtained for magnetic measurements on the previously described [Fe(bipy) 3 ]Cl 2 · 2H 2 O ( 16 ) and [Fe(bipy) 3 ](PF 6 ) 3 · 2H 2 O ( 17 ) . Although the two complexes are well known and have been described for many years, temperature dependent magnetic measurements are so far missing.…”

Section: Resultsmentioning

confidence: 99%

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Iron(II) and Iron(III) Complexes of Tridentate NNO Schiff Base‐like Ligands – X‐ray Structures and Magnetic Properties

Dankhoff

Schneider

Nowak

et al. 2018

Zeitschrift anorg allge chemie

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A series of new [Fe(L)2] iron(II) and [Fe(L)2]X iron(III) complexes is presented with varying tridentate NNO coordinating Schiff base‐like ligands (L–) and different counterions (X– = Cl–, Br–, I– BF4–, PF6–, and ClO4–) in the case of the iron(III) complexes. The crystal structures of one iron(II) and three iron(III) complexes are discussed, as well as the magnetic properties of the complexes regarding the possibility of the observation of spin crossover. While the three iron(II) complexes are predominantly high spin, in the case of the iron(III) complexes spin crossover was observed for the majority of the complexes (10 out of 12). Additionally, the optical properties and electrochemical behavior in solution was investigated and the results are compared with related systems from literature.

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Proton-driven coordination-induced spin state switch (PD-CISSS) of iron(ii) complexes

Cited by 54 publications

References 29 publications

Switching Magnetic Properties by a Mechanical Motion

Switching Magnetic Properties by a Mechanical Motion

Synthesis of Coordination Polymer Nanoparticles using Self‐Assembled Block Copolymers as Template

Iron(II) and Iron(III) Complexes of Tridentate NNO Schiff Base‐like Ligands – X‐ray Structures and Magnetic Properties

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