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http://hdl.handle.net/1843/57687| Type: | Artigo de Periódico |
| Title: | Controlled light and temperature induced valence tautomerism in a cobalt-o-dioxolene complex |
| Authors: | Ludmila Maria Diniz Leroy Thiago Martins Francisco Helena J. Shepherd Mark R. Warren Lucy K. Saunders David A. Shultz Paul R. Raithby Carlos Basílio Pinheiro |
| Abstract: | The mononuclear cobalt complex of 3,5-di-tert-butylcathecolate and cyan-pyridine (Co(diox)2(4-CN-py)2) is a very versatile compound that displays valence tautomerism (VT) in the solid state, which is induced by temperature, light, and hard X-rays, and modulated by solvent in the crystal lattice. In our work, we used single crystal X-ray diffraction as a probe for the light-induced VT in solid state and demonstrate the controlled use of hard X-rays via attenuation to avoid X-ray-induced VT interconversion. We report photoinduced VT in benzene solvated crystals of Co(diox)2(4-CN-py)2 illuminated with blue 450 nm light at 30 K with a very high yield (80%) of metastable hs-CoII states, and we also show evidence of the de-excitation of these photoinduced metastable states using red 660 nm light. Such high-yield light-induced VT had never been experimentally observed in molecular crystals of cobalt tautomers, proving that the 450 nm light illumination is triggering a chain of events that leads to the ls-CoIII to hs-CoII interconversion. |
| Subject: | Tautomeria Cobalto |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1021/acs.inorgchem.1c00638 |
| URI: | http://hdl.handle.net/1843/57687 |
| Issue Date: | 2021 |
| metadata.dc.url.externa: | https://pubs.acs.org/doi/10.1021/acs.inorgchem.1c00638 |
| metadata.dc.relation.ispartof: | Inorganic Chemistry |
| Appears in Collections: | Artigo de Periódico |
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