Photocrystallography of [Ru(bpy) 2 (dmso) 2 ] 2+ reveals an O-bonded metastable state

Zoe Marr (1) , Rajani Thapa Magar (2) , Bertrand Fournier (3, 4) , Jason Benedict (1) , Jeffrey Rack (2)

1 SUNY - State University of New York at Buffalo
2 The University of New Mexico [Albuquerque]
3 IGPS - Institut Galien Paris-Saclay
4 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides

We report the first instance of observing the phototriggered isomerization of dmso ligands on a bis sulfoxide complex, [Ru(bpy)2(dmso)2], in the crystalline solid state. The solid-state UV-vis spectrum of the crystal demonstrates an increase in optical density around 550 nm after irradiation, which is consistent with the solution isomerization results. Digital images of the crystal before and after irradiation display a notable color change (pale orange to red) and cleavage occurs along planes, ([1 with combining macron]01) and (100), during irradiation. Single crystal X-ray diffraction data also confirms that isomerization is occurring throughout the lattice and a structure that contains a mix of the S,S and O,O/S,O isomer was attained from a crystal irradiated ex situ. In situ irradiation XRD studies reveal that the percentage of the O-bonded isomer increases as a function of 405 nm exposure time.

Mots clés: phototriggered isomerization; crystalline solid state; sulfoxide complex

Domaines: Chimie de coordination; Cristallographie

Zoe Marr, Rajani Thapa Magar, Bertrand Fournier, Jason Benedict, Jeffrey Rack. Photocrystallography of [Ru(bpy) 2 (dmso) 2 ] 2+ reveals an O-bonded metastable state. Chemical Science, 2023, 14 (26), pp.7279-7284. ⟨10.1039/d3sc01526b⟩. ⟨hal-04361634⟩