Pronounced Magnetic Bistability in Highly Cooperative Mononuclear [Fe(Lnpdtz)2(NCX)2] Complexes

Kiehl J, Hochdoerffer T, Carrella LM, Schuenemann V, Nygaard MH, Overgaard J, Rentschler E (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Inorganic Chemistry American Chemical Society

Book Volume: 61

Pages Range: 3141-3151

Journal Issue: 7

DOI: 10.1021/acs.inorgchem.1c03491

Abstract

Molecular materials that exhibit stimuli-responsive bistability are promising candidates for the development of molecular switches and sensors. We herein report on the coexistence of a wide thermal hysteretic spin crossover (SCO) effect and a thermally inducible metastable high-spin state at low temperatures achieved with the two new complexes [Fe^II(L^npdtz)2(NCX)2] (X = S; Se), with L^npdtz being (2-naphthyl-5-pyridyl-1,2,4-thiadiazole) and X = S (1) and Se (2). Pronounced π-π-stacking of the aromatic side residues of the ligands enables strong intermolecular interactions, leading to abrupt SCO properties and broad magnetic hysteresis of 10 K for X = S and 58 K for X = Se. In this paper, we also present the pressure-induced spin-state switching around 0.8 GPa. A pronounced thermally induced excited spin state trapping (TIESST effect) is observed for the highly cooperative SCO compounds, which was experimentally followed by low-temperature single crystal structure analysis (20 K) and temperature-dependent Mössbauer spectroscopy.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU)

Germany (DE) Technische Universität Kaiserslautern

Germany (DE) Aarhus University

Denmark (DK)

How to cite

APA:

Kiehl, J., Hochdoerffer, T., Carrella, L.M., Schuenemann, V., Nygaard, M.H., Overgaard, J., & Rentschler, E. (2022). Pronounced Magnetic Bistability in Highly Cooperative Mononuclear [Fe(Lnpdtz)2(NCX)2] Complexes. Inorganic Chemistry, 61(7), 3141-3151. https://dx.doi.org/10.1021/acs.inorgchem.1c03491

MLA:

Kiehl, Jonathan, et al. "Pronounced Magnetic Bistability in Highly Cooperative Mononuclear [Fe(Lnpdtz)2(NCX)2] Complexes." Inorganic Chemistry 61.7 (2022): 3141-3151.

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