Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature.

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Details zur Publikation

Autor(en): Mörtel M, Witt A, Heinemann F, Bochmann S, Bachmann J, Khusniyarov M
Zeitschrift: Inorganic Chemistry
Jahr der Veröffentlichung: 2017
Band: 56
Heftnummer: 21
Seitenbereich: 13174-13186
ISSN: 1520-510X


Abstract


Spin-crossover molecular switches [FeII(H2B(pz)2)2L] (L = novel phenanthroline-based ligands featuring photochromic diarylethene units; pz = 1-pyrazolyl) were synthesized and thoroughly characterized by variable-temperature X-ray crystallography, Mössbauer spectroscopy, and magnetic measurements. The effect of substituents introduced into the phenanthroline backbone (L2) and into the photochromic diarylethene unit (L3) on photophysical properties of metal-free ligands and spin-crossover iron(II) complexes 2 and 3, respectively, were investigated in detail. Both ligands and complexes could be switched with light in solution at room temperature. The photocyclization of 2 was accompanied by a high-spin to low-spin photoconversion determined at 19%. The closed-ring isomers of L3 and 3 reveal the lifetimes in the range of minutes, whereas those of L2 and 2 are thermally stable for days in solutions at room temperature. The reversibility of the photoswitching can be improved by avoiding the photostationary states. Prospective introduction of anchoring groups to the phenanthroline backbone might allow the construction of chemisorbed self-assembled monolayers of spin-crossover species switchable with light at room temperature.


FAU-Autoren / FAU-Herausgeber

Bachmann, Julien Prof.
Lehrstuhl für Chemistry of thin film materials
Bochmann, Sebastian
Lehrstuhl für Anorganische und Allgemeine Chemie
Heinemann, Frank Dr.
Lehrstuhl für Anorganische und Allgemeine Chemie
Khusniyarov, Marat PD Dr.
Department Chemie und Pharmazie
Mörtel, Max
Lehrstuhl für Anorganische und Allgemeine Chemie
Witt, Alexander
Naturwissenschaftliche Fakultät


Zitierweisen

APA:
Mörtel, M., Witt, A., Heinemann, F., Bochmann, S., Bachmann, J., & Khusniyarov, M. (2017). Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature. Inorganic Chemistry, 56(21), 13174-13186. https://dx.doi.org/10.1021/acs.inorgchem.7b01952

MLA:
Mörtel, Max, et al. "Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature." Inorganic Chemistry 56.21 (2017): 13174-13186.

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Zuletzt aktualisiert 2018-02-08 um 13:08