Photochromic diarylethene ligands featuring 2-(imidazol-2-yl)pyridine coordination site and their iron(II) complexes
Lvov AG, Mörtel M, Yadykov A, Heinemann FW, Shirinian VZ, Khusniyarov M (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 15
Pages Range: 2428-2437
DOI: 10.3762/bjoc.15.235
Abstract
A new family of photochromic diarylethene-based ligands bearing a 2-(imidazol-2-yl)pyridine coordination unit has been developed. Four members of the new family have been synthesized. The photoactive ligands feature non-aromatic ethene bridges (cyclopentene, cyclopentenone, and cyclohexenone), as well as closely spaced photoactive and metal coordination sites aiming a strong impact of photocyclization on the electronic structure of the coordinated metal ion. The ligands with cyclopentenone and cyclohexenone bridges show good cycloreversion quantum yields of 0.20-0.32. The thermal stability of closed-ring isomers reveals half-lives of up to 20 days in solution at room temperature. The ligands were used to explore coordination chemistry with iron(II) targeting photoswitchable spin-crossover complexes. Unexpectedly, dinuclear and tetranuclear iron(II) complexes were obtained, which were thoroughly characterized by X-ray crystallography, magnetic measurements, and Mossbauer spectroscopy. The formation of multinuclear complexes is facilitated by two coordination sites of the diarylethene, acting as a bridging ligand. The bridging nature of the diarylethene in the complexes prevents photocyclization.
Authors with CRIS profile
Max Mörtel
Lehrstuhl für Anorganische und Allgemeine Chemie
Frank Wilhelm Heinemann
Lehrstuhl für Anorganische und Allgemeine Chemie
Marat Khusniyarov
Lehrstuhl für Anorganische und Allgemeine Chemie
Involved external institutions
Russian Federation (RU)How to cite
APA:
Lvov, A.G., Mörtel, M., Yadykov, A., Heinemann, F.W., Shirinian, V.Z., & Khusniyarov, M. (2019). Photochromic diarylethene ligands featuring 2-(imidazol-2-yl)pyridine coordination site and their iron(II) complexes. Beilstein Journal of Organic Chemistry, 15, 2428-2437. https://dx.doi.org/10.3762/bjoc.15.235
MLA:
Lvov, Andrey G., et al. "Photochromic diarylethene ligands featuring 2-(imidazol-2-yl)pyridine coordination site and their iron(II) complexes." Beilstein Journal of Organic Chemistry 15 (2019): 2428-2437.
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