Journal
INORGANIC CHEMISTRY
Volume 56, Issue 8, Pages 4357-4368Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b02861
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Funding
- Labex Arcane [ANR-11-LABX-0003-01]
- ANR program (MULTICOM project) [ANR-13-JS07-0012]
- Agence Nationale de la Recherche (ANR) [ANR-13-JS07-0012] Funding Source: Agence Nationale de la Recherche (ANR)
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Terpyridine ruthenium complexes linked to the dimethyldihydropyrene (DHP) photochromic unit have been synthesized and fully characterized by cyclic voltammetry and absorption and emission spectroscopy. The study of the photoisomerization reaction undergone by the DHP motif under visible light irradiation is reported. In comparison to previous work, the introduction of an electron-withdrawing pyridinium spacer between the chelating terpyridine unit and the DHP skeleton has considerably tuned the photochromic properties of the free ligands and their corresponding complexes in term of time response and photoreversibility. A rapid, reversible, and complete conversion between the closed and the open forms has been clearly evidenced under visible light irradiation. Only slight perturbations have been induced by the presence of ruthenium centers. Experimental findings and their interpretation have been supported by theoretical calculations.
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