Mechanistic study of the trans,cis,cis-[RuCl2(DMSO)2(H2O)2] complex photochemistry in aqueous solutions

Anton A. Shushakov; Svetlana G. Matveeva; Ivan P. Pozdnyakov; Vjacheslav P. Grivin; Victor F. Plyusnin; Danila B. Vasilchenko; Alexei A. Melnikov; Sergei V. Chekalin; Evgeni M. Glebov

doi:10.1039/D0PP00178C

Mechanistic study of the trans,cis,cis-[RuCl₂(DMSO)₂(H₂O)₂] complex photochemistry in aqueous solutions†

Anton A. Shushakov,^ab Svetlana G. Matveeva,

^a Ivan P. Pozdnyakov,^ab Vjacheslav P. Grivin,^ab Victor F. Plyusnin,^ab Danila B. Vasilchenko,

^cb Alexei A. Melnikov,^de Sergei V. Chekalin^d and Evgeni M. Glebov

*^ab

Author affiliations

* Corresponding authors

^a Voevodsky Institute of Chemical Kinetics and Combustion, 3 Institutskaya Str., Novosibirsk, Russian Federation
E-mail: glebov@kinetics.nsc.ru
Fax: +7383 3307350
Tel: +7 383 3309150

^b Novosibirsk State University, 2 Pirogova Str., Novosibirsk, Russian Federation

^c Nikolaev Institute of Inorganic Chemistry, 5 Lavrentyev Prosp., Novosibirsk, Russian Federation
E-mail: vasilchenko@niic.nsc.ru

^d Institute of Spectroscopy, Russian Academy of Sciences, 5 Fizicheskaya Str., Troitsk, Moscow, Russian Federation
E-mail: melnikov@isan.troitsk.ru

^e Faculty of Physics, National Research University Higher School of Economics, 20 Myasnitskaya Str., 101000 Moscow, Russian Federation

Abstract

It is known that trans,cis,cis-[RuCl₂(DMSO)₂(H₂O)₂] (1a) complexes, which are formed upon dissolution of trans-[RuCl₂(DMSO)₄] in water, demonstrate light-induced cytotoxicity. The mechanistic study of 1a photochemistry has been performed using ultrafast pump–probe spectroscopy, laser flash photolysis and stationary photolysis. The first stage of 1a photochemistry is the photoexchange of a DMSO ligand to a water molecule; its quantum yield is wavelength-dependent (estimating by values 0.3 and 0.04 upon irradiation at 308 and 430 nm, respectively). The mechanism of photoexchange is complicated involving at least four Ru(II) intermediates. Two tentative mechanisms of the process are proposed.

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Article information

DOI: https://doi.org/10.1039/D0PP00178C
Article type: Paper
Submitted: 07 May 2020
Accepted: 19 Jul 2020
First published: 20 Jul 2020

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Photochem. Photobiol. Sci., 2020,19, 1222-1229

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Mechanistic study of the trans,cis,cis-[RuCl₂(DMSO)₂(H₂O)₂] complex photochemistry in aqueous solutions

A. A. Shushakov, S. G. Matveeva, I. P. Pozdnyakov, V. P. Grivin, V. F. Plyusnin, D. B. Vasilchenko, A. A. Melnikov, S. V. Chekalin and E. M. Glebov, Photochem. Photobiol. Sci., 2020, 19, 1222 DOI: 10.1039/D0PP00178C

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Photochemical & Photobiological Sciences