A New Porous Three-Dimensional Iron(II) Coordination Polymer with Solvent-Induced Reversible Spin-Crossover Behavior

2018 ◽  
Vol 18 (9) ◽  
pp. 5214-5219 ◽  
Author(s):  
Yan Meng ◽  
Yan-Jie Dong ◽  
Zheng Yan ◽  
Yan-Cong Chen ◽  
Xiao-Wei Song ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Three Dimensional ◽  
Crossover Behavior

Modification of Spin Crossover Behavior through Solvent Assisted Formation and Solvent Inclusion in a Triply Interpenetrating Three-Dimensional Network

2007 ◽  
Vol 46 (10) ◽  
pp. 4220-4229 ◽  
Author(s):  
Matthias Bartel ◽  
Alina Absmeier ◽  
Guy N. L. Jameson ◽  
Franz Werner ◽  
Kenichi Kato ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Three Dimensional ◽  
Dimensional Network ◽  
Crossover Behavior

scholarly journals Co-Processing of [Fe(NH2trz)3](2ns)2 and UHMWPE into Materials Combining (Spin Crossover and High Mechanical Strength

Sci ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 66
Author(s):  
Manuel Baumgartner ◽  
Raphael Schaller ◽  
Paul Smith ◽  
Irene Weymuth ◽  
Walter Caseri
Keyword(s):  
Mechanical Properties ◽  
Coordination Polymer ◽  
Spin Crossover ◽  
Magnetic Transition ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Mechanical Strength ◽  
Flexible Films ◽  
Ultrahigh Molecular Weight ◽  
Crossover Behavior ◽  
Poor Solvent

The coordination polymer [Fe(NH2trz)3](2ns)2 exhibits the rare phenomenon of spin crossover in an attractive temperature range, i.e., somewhat above room temperature. Spin crossover in [Fe(NH2trz)3](2ns)2 is manifest by thermochromism, which is accompanied by a magnetic transition from diamagnetism to paramagnetism. However, [Fe(NH2trz)3](2ns)2 is brittle and difficult to process, which limits its use. In this study, we show that [Fe(NH2trz)3](2ns)2 can be co-processed with ultrahigh molecular weight polyethylene (UHMWPE), which possesses outstanding mechanical properties, particularly when tensile drawn. Therefore, [Fe(NH2trz)3](2ns)2–UHMWPE blends were gel-processed by extrusion, employing a relatively poor solvent, which has recently been shown to offer advantages compared to good solvents. Uniform and flexible films, ribbons and fibers with [Fe(NH2trz)3](2ns)2 fractions as high as 33.3% m/m were obtained that could be readily drawn. Spin crossover in the coordination polymer is retained in these materials, as evident from their thermochromism. The tensile strength and Young’s modulus of the blends exceed those of typical commodity polymers. Thus, the films, ribbons and fibers constitute a special class of multifunctional materials that combine the flexibility and excellent mechanical properties of drawn UHMWPE with the spin crossover behavior of [Fe(NH2trz)3](2ns)2.

Asymmetric seven-/eight-step spin-crossover in a three-dimensional Hofmann-type metal–organic framework

2020 ◽  
Vol 7 (8) ◽  
pp. 1685-1690 ◽  
Author(s):  
Yuan-Yuan Peng ◽  
Si-Guo Wu ◽  
Yan-Cong Chen ◽  
Wei Liu ◽  
Guo-Zhang Huang ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Crossover Behavior ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

An unprecedented hysteretic seven-/eight-step spin-crossover behavior is revealed. Most importantly, a molecular alloy based on a Hofmann-type framework is used as a strategy to explore multi-step spin-crossover materials for the first time.

Homoleptic Iron(II) Complexes with the Ionogenic Ligand 6,6′-Bis(1H-tetrazol-5-yl)-2,2′-bipyridine: Spin Crossover Behavior in a Singular 2D Spin Crossover Coordination Polymer

2015 ◽  
Vol 54 (15) ◽  
pp. 7424-7432 ◽  
Author(s):  
Maksym Seredyuk ◽  
Lucía Piñeiro-López ◽  
M. Carmen Muñoz ◽  
Francisco J. Martínez-Casado ◽  
Gábor Molnár ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Crossover Behavior

scholarly journals Co-Processing of [Fe(NH2trz)3](2ns)2 and UHMWPE into Materials Combining (Spin Crossover and High Mechanical Strength

Sci ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Manuel Baumgartner ◽  
Raphael Schaller ◽  
Paul Smith ◽  
Irene Weymuth ◽  
Walter Caseri
Keyword(s):  
Mechanical Properties ◽  
Coordination Polymer ◽  
Spin Crossover ◽  
Magnetic Transition ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Mechanical Strength ◽  
Flexible Films ◽  
Ultrahigh Molecular Weight ◽  
Crossover Behavior ◽  
Poor Solvent

The coordination polymer [Fe(NH2trz)3](2ns)2 (NH2trz = 4-amino-1,2,4-triazole and 2ns− = counterion 2-naphthalene sulfonate) exhibits the rare phenomenon of spin crossover in an attractive temperature range, i.e., somewhat above room temperature. Spin crossover in [Fe(NH2trz)3](2ns)2 is manifested by thermochromism, which is accompanied by a magnetic transition from diamagnetism to paramagnetism. However, [Fe(NH2trz)3](2ns)2 is brittle and difficult to process, which limits its use. In this study, we show that [Fe(NH2trz)3](2ns)2 can be co-processed with ultrahigh molecular weight polyethylene (UHMWPE), which possesses outstanding mechanical properties, particularly when tensile-drawn. Therefore, [Fe(NH2trz)3](2ns)2–UHMWPE blends were gel-processed by extrusion, employing a relatively poor solvent, which has recently been shown to offer advantages compared to good solvents. Uniform and flexible films, ribbons and fibers with [Fe(NH2trz)3](2ns)2 fractions as high as 33.3% m/m were obtained that could be readily drawn. Spin crossover in the coordination polymer is retained in these materials, as evident from their thermochromism. The tensile strength and Young’s modulus of the blends exceed those of typical commodity polymers. Thus, the films, ribbons and fibers constitute a special class of multifunctional materials that combine the flexibility and excellent mechanical properties of drawn UHMWPE with the spin crossover behavior of [Fe(NH2trz)3](2ns)2.

Three-dimensional iron(ii) porous coordination polymer exhibiting carbon dioxide-dependent spin crossover

2018 ◽  
Vol 54 (34) ◽  
pp. 4262-4265 ◽  
Author(s):  
Jong Won Shin ◽  
Ah Rim Jeong ◽  
Sungeun Jeoung ◽  
Hoi Ri Moon ◽  
Yuki Komatsumaru ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Coordination Polymer ◽  
Spin Crossover ◽  
Three Dimensional ◽  
Porous Coordination Polymer

A three-dimensional iron(ii) porous coordination polymer has been observed spin crossover behaviours through the sorption of H2O and CO2, respectively.

Guest-Effected Spin-Crossover in a Novel Three-Dimensional Self-Penetrating Coordination Polymer with Permanent Porosity

2014 ◽  
Vol 53 (8) ◽  
pp. 4039-4046 ◽  
Author(s):  
Jin-Yan Li ◽  
Zheng Yan ◽  
Zhao-Ping Ni ◽  
Ze-Min Zhang ◽  
Yan-Cong Chen ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Three Dimensional

Metal Dilution Effects on the Spin-Crossover Properties of the Three-Dimensional Coordination Polymer Fe(pyrazine)[Pt(CN)4]

2005 ◽  
Vol 109 (31) ◽  
pp. 14859-14867 ◽  
Author(s):  
Takeshi Tayagaki ◽  
Ana Galet ◽  
Gábor Molnár ◽  
M. Carmen Muñoz ◽  
Antoine Zwick ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Three Dimensional ◽  
Dilution Effects

Modulation of Spin-Crossover Behavior in an Elongated and Flexible Hofmann-Type Porous Coordination Polymer

2012 ◽  
Vol 23 (1) ◽  
pp. 104-110 ◽  
Author(s):  
Ryo Ohtani ◽  
Masashi Arai ◽  
Akihiro Hori ◽  
Masaki Takata ◽  
Shinji Kitao ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Crossover Behavior ◽  
Porous Coordination Polymer

The substituent guest effect on four-step spin-crossover behavior

2020 ◽  
Vol 7 (4) ◽  
pp. 911-917 ◽  
Author(s):  
Cui-Juan Zhang ◽  
Kai-Ting Lian ◽  
Si-Guo Wu ◽  
Yang Liu ◽  
Guo-Zhang Huang ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Crossover Behavior ◽  
Metal Organic ◽  
Organic Framework

The fluoro substituent strategy on the guest in a three-dimensional Hofmann-type metal–organic framework is explored for four-step spin-crossover properties.

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