A cyanide-bridged FeII/FeIII mixed-valence chain exhibiting spin transition in the Fe(II) sites

Guo Ling Li; Soonchul Kang; Shu Qi Wu; Sheng Qun Su; Osamu Sato; Zhong Hai Ni

doi:10.1016/j.inoche.2024.112619

A cyanide-bridged Fe^II/Fe^III mixed-valence chain exhibiting spin transition in the Fe(II) sites

Guo Ling Li
, Soonchul Kang
, Shu Qi Wu
, Sheng Qun Su
, Osamu Sato
, Zhong Hai Ni

Department of Fundamental Organic Chemistry

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

1 Citation (Scopus)

Abstract

A cyanide-bridged {Fe^III₂Fe^II}_n one-dimensional chain {[Fe(Tp)(CN)₃]₂Fe(btb)}_n (1) (Tp = hydrotris(pyrazolyl)borate, btb = 1,4-(1H-1,2,4-triazole)butane) has been synthesized via the hydrothermal reaction of Li[Fe(Tp)(CN)₃], btb, and Fe^II(ClO₄)₂·6H₂O at 120 °C. Single-crystal X-ray analysis reveals that compound 1 is an isolated neutral mixed-valence {Fe^III₂Fe^II}_n double-zigzag chain with each [Fe^III(Tp)(CN)₃]⁻ unit connecting with two Fe(II) centres via two of its three CN⁻ groups in the cis-positions, and two triazole groups from btb coordinated with Fe(II) ion in its axial positions. Single-crystal data obtained at different temperature together with magnetic data indicate that complex 1 exhibits thermal induced spin transition in the Fe(II) sites with T_1/2 ≈ 165 K. Additionally, light-induced excited spin-state trapping (LIESST) of 1 was also observed at low temperature.

Original language	English
Article number	112619
Journal	Inorganic Chemistry Communications
Volume	166
DOIs	https://doi.org/10.1016/j.inoche.2024.112619
Publication status	Published - Aug 2024

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{39b47757e9f64205893ff02c6a52a0ba,

title = "A cyanide-bridged FeII/FeIII mixed-valence chain exhibiting spin transition in the Fe(II) sites",

abstract = "A cyanide-bridged \{FeIII2FeII\}n one-dimensional chain \{[Fe(Tp)(CN)3]2Fe(btb)\}n (1) (Tp = hydrotris(pyrazolyl)borate, btb = 1,4-(1H-1,2,4-triazole)butane) has been synthesized via the hydrothermal reaction of Li[Fe(Tp)(CN)3], btb, and FeII(ClO4)2·6H2O at 120 °C. Single-crystal X-ray analysis reveals that compound 1 is an isolated neutral mixed-valence \{FeIII2FeII\}n double-zigzag chain with each [FeIII(Tp)(CN)3]− unit connecting with two Fe(II) centres via two of its three CN− groups in the cis-positions, and two triazole groups from btb coordinated with Fe(II) ion in its axial positions. Single-crystal data obtained at different temperature together with magnetic data indicate that complex 1 exhibits thermal induced spin transition in the Fe(II) sites with T1/2 ≈ 165 K. Additionally, light-induced excited spin-state trapping (LIESST) of 1 was also observed at low temperature.",

keywords = "Cyanide-bridge, Double-zigzag chain, Mixed-valence iron, Spin transition",

author = "Li, \{Guo Ling\} and Soonchul Kang and Wu, \{Shu Qi\} and Su, \{Sheng Qun\} and Osamu Sato and Ni, \{Zhong Hai\}",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = aug,

doi = "10.1016/j.inoche.2024.112619",

language = "English",

volume = "166",

journal = "Inorganic Chemistry Communications",

issn = "1387-7003",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A cyanide-bridged FeII/FeIII mixed-valence chain exhibiting spin transition in the Fe(II) sites

AU - Li, Guo Ling

AU - Kang, Soonchul

AU - Wu, Shu Qi

AU - Su, Sheng Qun

AU - Sato, Osamu

AU - Ni, Zhong Hai

PY - 2024/8

Y1 - 2024/8

N2 - A cyanide-bridged {FeIII2FeII}n one-dimensional chain {[Fe(Tp)(CN)3]2Fe(btb)}n (1) (Tp = hydrotris(pyrazolyl)borate, btb = 1,4-(1H-1,2,4-triazole)butane) has been synthesized via the hydrothermal reaction of Li[Fe(Tp)(CN)3], btb, and FeII(ClO4)2·6H2O at 120 °C. Single-crystal X-ray analysis reveals that compound 1 is an isolated neutral mixed-valence {FeIII2FeII}n double-zigzag chain with each [FeIII(Tp)(CN)3]− unit connecting with two Fe(II) centres via two of its three CN− groups in the cis-positions, and two triazole groups from btb coordinated with Fe(II) ion in its axial positions. Single-crystal data obtained at different temperature together with magnetic data indicate that complex 1 exhibits thermal induced spin transition in the Fe(II) sites with T1/2 ≈ 165 K. Additionally, light-induced excited spin-state trapping (LIESST) of 1 was also observed at low temperature.

AB - A cyanide-bridged {FeIII2FeII}n one-dimensional chain {[Fe(Tp)(CN)3]2Fe(btb)}n (1) (Tp = hydrotris(pyrazolyl)borate, btb = 1,4-(1H-1,2,4-triazole)butane) has been synthesized via the hydrothermal reaction of Li[Fe(Tp)(CN)3], btb, and FeII(ClO4)2·6H2O at 120 °C. Single-crystal X-ray analysis reveals that compound 1 is an isolated neutral mixed-valence {FeIII2FeII}n double-zigzag chain with each [FeIII(Tp)(CN)3]− unit connecting with two Fe(II) centres via two of its three CN− groups in the cis-positions, and two triazole groups from btb coordinated with Fe(II) ion in its axial positions. Single-crystal data obtained at different temperature together with magnetic data indicate that complex 1 exhibits thermal induced spin transition in the Fe(II) sites with T1/2 ≈ 165 K. Additionally, light-induced excited spin-state trapping (LIESST) of 1 was also observed at low temperature.

KW - Cyanide-bridge

KW - Double-zigzag chain

KW - Mixed-valence iron

KW - Spin transition

UR - https://www.scopus.com/pages/publications/85193935258

UR - https://www.scopus.com/pages/publications/85193935258#tab=citedBy

U2 - 10.1016/j.inoche.2024.112619

DO - 10.1016/j.inoche.2024.112619

M3 - Article

AN - SCOPUS:85193935258

SN - 1387-7003

VL - 166

JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

M1 - 112619

ER -

A cyanide-bridged Fe^II/Fe^III mixed-valence chain exhibiting spin transition in the Fe(II) sites

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