American Chemical Society (ACS)
Crystal Growth and Design
,  volume 25 ,  issue 8 ,  pages 2674-2682

Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand

Thangavel Thirunavukkarasu 1
, 
Nour-el-islam Belmouri 2
, 
Nour El Islam Belmouri 2
, 
Catherine Charles 1
, 
Ahmad Hobballah 1
, 
Longhe Li 2
, 
Carlos J. Gómez-García 3
, 
Sébastien Pillet 4
, 
Kamel Boukheddaden 2
, 
S. Triki 1
1
 
UMR CNRS 6521, Chimie, Electrochimie Moléculaires, Chimie Analytique, Université de Bretagne Occidentale, 6 Avenue Victor Le Gorgeu, BP 809, Brest Cedex 29285, France | 
2
 
3
 
4
 
Publication type: Journal Article
Publication date: 2025-03-26
American Chemical Society (ACS)
scimago Q2
wos Q1
SJR: 0.633
CiteScore: 5.6
Impact factor: 3.4
ISSN: 15287483, 15287505
Abstract
A novel spin-crossover (SCO) dinuclear complex, [Fe2(μ2-cp-trz)3(cp-trz)2(tcm)4] (cp-trz = 4-cyclo-pentyl-1,2,4-triazole, tcm- = tricyanomethanide anion), was synthesized and thoroughly characterized. Crystallographic analyses at 250 and 180 K revealed a centrosymmetric dinuclear structure with Fe(II) centers bridged by triazole ligands. The complex exhibits a cooperative hysteretic thermally induced abrupt one-step spin transition between high-spin (HS) and low-spin (LS) states. Magnetic measurements (Magn), X-rays diffraction (XRD), and optical microscopy (OM) show the following switching temperatures: T1/2↓Magn = 202 K and T1/2↑Magn = 212 K, and T1/2↓OM ≃ T1/2↓XRD = 203 K and T1/2↑OM ≃ T1/2↑XRD = 207 K. Moreover, structural and OM studies reveal significant anisotropic lattice changes, driven by strong hydrogen bonding along the c axis, which underpins the cooperative behavior of the SCO transition, and propagation of the HS/LS interface along the spin transition.
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Thirunavukkarasu T. et al. Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand // Crystal Growth and Design. 2025. Vol. 25. No. 8. pp. 2674-2682.
GOST all authors (up to 50) Copy
Thirunavukkarasu T., Belmouri N., Belmouri N. E. I., Charles C., Hobballah A., Li L., Gómez-García C. J., Pillet S., Boukheddaden K., Triki S. Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand // Crystal Growth and Design. 2025. Vol. 25. No. 8. pp. 2674-2682.
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TY - JOUR
DO - 10.1021/acs.cgd.5c00158
UR - https://pubs.acs.org/doi/10.1021/acs.cgd.5c00158
TI - Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand
T2 - Crystal Growth and Design
AU - Thirunavukkarasu, Thangavel
AU - Belmouri, Nour-el-islam
AU - Belmouri, Nour El Islam
AU - Charles, Catherine
AU - Hobballah, Ahmad
AU - Li, Longhe
AU - Gómez-García, Carlos J.
AU - Pillet, Sébastien
AU - Boukheddaden, Kamel
AU - Triki, S.
PY - 2025
DA - 2025/03/26
PB - American Chemical Society (ACS)
SP - 2674-2682
IS - 8
VL - 25
SN - 1528-7483
SN - 1528-7505
ER -
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@article{2025_Thirunavukkarasu,
author = {Thangavel Thirunavukkarasu and Nour-el-islam Belmouri and Nour El Islam Belmouri and Catherine Charles and Ahmad Hobballah and Longhe Li and Carlos J. Gómez-García and Sébastien Pillet and Kamel Boukheddaden and S. Triki},
title = {Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand},
journal = {Crystal Growth and Design},
year = {2025},
volume = {25},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://pubs.acs.org/doi/10.1021/acs.cgd.5c00158},
number = {8},
pages = {2674--2682},
doi = {10.1021/acs.cgd.5c00158}
}
MLA
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Thirunavukkarasu, Thangavel, et al. “Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand.” Crystal Growth and Design, vol. 25, no. 8, Mar. 2025, pp. 2674-2682. https://pubs.acs.org/doi/10.1021/acs.cgd.5c00158.