Study on the spin-crossover transition in [Fe(cis-/trans-stpy) 4(X)2] (stpy: Styrylpyridine, X: NCS, NCBH3) under high pressure toward ligand-driven light-induced spin change

Akira Sugahara; Kimio Moriya; Masaya Enomoto; Atsushi Okazawa; Norimichi Kojima

doi:10.1016/j.poly.2011.03.008

Study on the spin-crossover transition in [Fe(cis-/trans-stpy) ₄(X)₂] (stpy: Styrylpyridine, X: NCS, NCBH₃) under high pressure toward ligand-driven light-induced spin change

Akira Sugahara, Kimio Moriya, Masaya Enomoto, Atsushi Okazawa, Norimichi Kojima^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Toward the realization of a ligand-driven light-induced spin change (LD-LISC) around room temperature, we have investigated the spin-crossover phenomenon in [Fe(stpy)₄(X)₂] (stpy = styrylpyridine, X = NCS, NCBH₃) under high pressure. The spin transition temperature increases from 110 to 220 K with increasing applied pressure up to 0.75 GPa for [Fe(trans-stpy)₄(NCS)₂], while [Fe(cis-stpy) ₄(NCS)₂] shows the high-spin state in the temperature region between 2 and 300 K even at 0.75 GPa. In the case of X = NCBH ₃, due to the stronger ligand field of NCBH₃, the spin transition temperature increases from 240 to 360 K with increasing applied pressure up to 0.50 GPa for [Fe(trans-stpy)₄(NCBH₃) ₂]. In the case of [Fe(cis-stpy)₄(NCBH₃) ₂], the spin state is the high-spin state in the temperature region between 2 and 300 K. However, the spin transition appears at 125 K under 0.5 GPa and the transition temperature increases with increasing applied pressure. In this way, we have decided the applied pressure region of 0.65-1.09 GPa where [Fe(stpy)₄(NCBH₃)₂] undergoes LD-LISC at room temperature.

Original language	English
Pages (from-to)	3127-3130
Number of pages	4
Journal	Polyhedron
Volume	30
Issue number	18
DOIs	https://doi.org/10.1016/j.poly.2011.03.008
Publication status	Published - 2011 Nov 28
Externally published	Yes

Keywords

High pressure
Ligand-driven light-induced spin change
Spin crossover

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.poly.2011.03.008

Cite this

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title = "Study on the spin-crossover transition in [Fe(cis-/trans-stpy) 4(X)2] (stpy: Styrylpyridine, X: NCS, NCBH3) under high pressure toward ligand-driven light-induced spin change",

abstract = "Toward the realization of a ligand-driven light-induced spin change (LD-LISC) around room temperature, we have investigated the spin-crossover phenomenon in [Fe(stpy)4(X)2] (stpy = styrylpyridine, X = NCS, NCBH3) under high pressure. The spin transition temperature increases from 110 to 220 K with increasing applied pressure up to 0.75 GPa for [Fe(trans-stpy)4(NCS)2], while [Fe(cis-stpy) 4(NCS)2] shows the high-spin state in the temperature region between 2 and 300 K even at 0.75 GPa. In the case of X = NCBH 3, due to the stronger ligand field of NCBH3, the spin transition temperature increases from 240 to 360 K with increasing applied pressure up to 0.50 GPa for [Fe(trans-stpy)4(NCBH3) 2]. In the case of [Fe(cis-stpy)4(NCBH3) 2], the spin state is the high-spin state in the temperature region between 2 and 300 K. However, the spin transition appears at 125 K under 0.5 GPa and the transition temperature increases with increasing applied pressure. In this way, we have decided the applied pressure region of 0.65-1.09 GPa where [Fe(stpy)4(NCBH3)2] undergoes LD-LISC at room temperature.",

keywords = "High pressure, Ligand-driven light-induced spin change, Spin crossover",

author = "Akira Sugahara and Kimio Moriya and Masaya Enomoto and Atsushi Okazawa and Norimichi Kojima",

year = "2011",

month = nov,

day = "28",

doi = "10.1016/j.poly.2011.03.008",

language = "English",

volume = "30",

pages = "3127--3130",

journal = "Polyhedron",

issn = "0277-5387",

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T1 - Study on the spin-crossover transition in [Fe(cis-/trans-stpy) 4(X)2] (stpy

T2 - Styrylpyridine, X: NCS, NCBH3) under high pressure toward ligand-driven light-induced spin change

AU - Sugahara, Akira

AU - Moriya, Kimio

AU - Enomoto, Masaya

AU - Okazawa, Atsushi

AU - Kojima, Norimichi

PY - 2011/11/28

Y1 - 2011/11/28

N2 - Toward the realization of a ligand-driven light-induced spin change (LD-LISC) around room temperature, we have investigated the spin-crossover phenomenon in [Fe(stpy)4(X)2] (stpy = styrylpyridine, X = NCS, NCBH3) under high pressure. The spin transition temperature increases from 110 to 220 K with increasing applied pressure up to 0.75 GPa for [Fe(trans-stpy)4(NCS)2], while [Fe(cis-stpy) 4(NCS)2] shows the high-spin state in the temperature region between 2 and 300 K even at 0.75 GPa. In the case of X = NCBH 3, due to the stronger ligand field of NCBH3, the spin transition temperature increases from 240 to 360 K with increasing applied pressure up to 0.50 GPa for [Fe(trans-stpy)4(NCBH3) 2]. In the case of [Fe(cis-stpy)4(NCBH3) 2], the spin state is the high-spin state in the temperature region between 2 and 300 K. However, the spin transition appears at 125 K under 0.5 GPa and the transition temperature increases with increasing applied pressure. In this way, we have decided the applied pressure region of 0.65-1.09 GPa where [Fe(stpy)4(NCBH3)2] undergoes LD-LISC at room temperature.

AB - Toward the realization of a ligand-driven light-induced spin change (LD-LISC) around room temperature, we have investigated the spin-crossover phenomenon in [Fe(stpy)4(X)2] (stpy = styrylpyridine, X = NCS, NCBH3) under high pressure. The spin transition temperature increases from 110 to 220 K with increasing applied pressure up to 0.75 GPa for [Fe(trans-stpy)4(NCS)2], while [Fe(cis-stpy) 4(NCS)2] shows the high-spin state in the temperature region between 2 and 300 K even at 0.75 GPa. In the case of X = NCBH 3, due to the stronger ligand field of NCBH3, the spin transition temperature increases from 240 to 360 K with increasing applied pressure up to 0.50 GPa for [Fe(trans-stpy)4(NCBH3) 2]. In the case of [Fe(cis-stpy)4(NCBH3) 2], the spin state is the high-spin state in the temperature region between 2 and 300 K. However, the spin transition appears at 125 K under 0.5 GPa and the transition temperature increases with increasing applied pressure. In this way, we have decided the applied pressure region of 0.65-1.09 GPa where [Fe(stpy)4(NCBH3)2] undergoes LD-LISC at room temperature.

KW - High pressure

KW - Ligand-driven light-induced spin change

KW - Spin crossover

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