Milek M, Heinemann FW, Khusniyarov M (2013)
Publication Status: Published
Publication Type: Journal article
Publication year: 2013
Book Volume: 52
Pages Range: 11585-11592
Journal Issue: 19
DOI: 10.1021/ic401960x
A photoisomerizable diarylethene-derived ligand, phen*, has been successfully introduced into a spin-crossover iron(II) complex, [Fe(H2B(pz)2)2phen*] (1; pz =1-pyrazolyl). A ligand-based photocyclization (photocycloreversion) in 1 modifies the ligand field, which, in turn, results in a highly efficient paramagnetic high-spin → diamagnetic low-spin (low-spin → high-spin) transition at the coordinated Fe(II) ion. The reversible photoswitching of the spin states, and thus the associated magnetic properties, has been performed in solution at room temperature and has been directly monitored by measuring the magnetic susceptibility via the Evans method. The observed spin-state photoconversion in 1 exceeds 40%, which is the highest value for spin-crossover molecular switches in solution at room temperature reported to date. The photoexcited state is extraordinarily thermally stable, showing a half-time of about 18 days in solution at room temperature. Because of the outstanding photophysical properties of diarylethenes, including single-crystalline photochromism, molecular switch 1 may offer a promising platform for controlling the magnetic properties in the solid state and ultimately at the single-molecule level with light at room temperature.
APA:
Milek, M., Heinemann, F.W., & Khusniyarov, M. (2013). Spin crossover meets diarylethenes: efficient photoswitching of magnetic properties in solution at room temperature. Inorganic Chemistry, 52(19), 11585-11592. https://doi.org/10.1021/ic401960x
MLA:
Milek, Magdalena, Frank Wilhelm Heinemann, and Marat Khusniyarov. "Spin crossover meets diarylethenes: efficient photoswitching of magnetic properties in solution at room temperature." Inorganic Chemistry 52.19 (2013): 11585-11592.
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