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Published on: July 4, 2016
Bidirectional chemo-switching of spin state in a microporous framework
Masaaki Ohba1, Ko Yoneda, Gloria Agustí
1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. ohba@sbchem.kyoto-u.ac.jp
This study demonstrates room-temperature magnetic switching in a coordination polymer. Most guest molecules induce a low-spin to high-spin state change, but carbon disulfide uniquely triggers the reverse high-spin to low-spin transition.
Area of Science:
- Materials Science
- Chemistry
- Physics
Background:
- Spin-crossover (SCO) materials exhibit distinct magnetic states.
- Microporous coordination polymers offer tunable frameworks for guest interactions.
Purpose of the Study:
- To investigate the magnetic switching behavior of a microporous coordination polymer incorporating SCO subunits.
- To explore the influence of guest molecules on the spin state of the material.
Main Methods:
- Synthesis of the microporous coordination polymer {Fe(pz)[Pt(CN)(4)]} (1).
- In situ magnetic measurements during guest vapor injection.
- Analysis of spin transitions (low-spin to high-spin and vice versa).
Main Results:
- Achieved two-directional magnetic chemo-switching at room temperature.
- Most guest molecules induced a transition from the low-spin (LS) to the high-spin (HS) state.
- Carbon disulfide (CS(2)) uniquely induced the reverse HS-to-LS transition.
Conclusions:
- Demonstrated the potential of {Fe(pz)[Pt(CN)(4)]} for responsive magnetic materials.
- Highlighted the selective control over spin states based on guest molecule interactions.
- Identified CS(2) as a unique trigger for HS-to-LS switching in this system.
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