New Acridine-Based Tridentate Ligand for Ruthenium(II): Coordination with a Twist - Archive ouverte HAL Access content directly
Journal Articles Inorganic Chemistry Year : 2018

New Acridine-Based Tridentate Ligand for Ruthenium(II): Coordination with a Twist

Abstract

A new tridentate ligand based on acridine has been synthetized. The central acridine heterocycle bears two pyridine coordinating units at positions 4 and 5. The terdentate 2,7-di-tert-butyl-4,5-di(pyridin-2-yl)acridine (dtdpa) was then coordinated to a ruthenium(II) cation. The corresponding homoleptic complex could only be obtained where both ligands coordinate to the ruthenium in a fac fashion. Thus, a heteroleptic compound (2) was constructed in combination with a terpyridine ligand in order to constrain the ligand to adopt a mer geometry. Such a coordination imposes a dramatic twist on the acridine heterocycle, resulting in an unexpected photophysical behavior. The electrochemical and photophysical properties of both complexes were studied, and the molecular structure of 2 was determined by X-ray diffraction. The two compounds absorb at low energy wavelengths, and a very weak luminescence is detected only for complex 2 in the near-infrared region.
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Dates and versions

hal-01985019 , version 1 (17-01-2019)

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Ali Awada, Angélica Moreno-Betancourt, Christian Philouze, Yohann Moreau, Damien Jouvenot, et al.. New Acridine-Based Tridentate Ligand for Ruthenium(II): Coordination with a Twist. Inorganic Chemistry, 2018, 57 (24), pp.15430-15437. ⟨10.1021/acs.inorgchem.8b02735⟩. ⟨hal-01985019⟩
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