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EXAFS, DFT, light-induced nucleobase binding, and cytotoxicity of the photoactive complex cis-[Ru(bpy)2(CO)Cl]+
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Salassa, Luca, Ruiu, Tiziana, Garino, Claudio, Pizarro, Ana M., Bardelli, Fabrizio, Gianolio, Diego, Westendorf, Aron, Bednarski, Patrick J., Lamberti, Carlo, Gobetto, Roberto and Sadler, P. J. (2010) EXAFS, DFT, light-induced nucleobase binding, and cytotoxicity of the photoactive complex cis-[Ru(bpy)2(CO)Cl]+. Organometallics, Vol.29 (No.4). pp. 6703-6710. doi:10.1021/om100734y ISSN 0276-7333.
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Official URL: http://dx.doi.org/10.1021/om100734y
Abstract
The aqueous photochemistry of cis-[Ru(bpy)2(CO)Cl]+ (1) was investigated at 310 K and under visible light (white) irradiation by NMR and ESI-HR-MS. Complex 1 releases a Cl ligand, coordinates a solvent molecule, and forms the complex cis-[Ru(bpy)2(CO)(H2O)]2+ (2). Also, irradiation experiments were performed in the presence of the nucleobase derivatives 9-ethylguanine (9-EtG) and 9-ethyladenine (9-EtA). Formation of Ru-9-EtG adducts was observed after 3 h irradiation by NMR and HR-MS, while only very small amounts of a Ru-9-EtA adduct could be detected by HR-MS. Solution structural data were obtained by X-ray absorption spectroscopy (XAS) for both 1 and 2. EXAFS gave a Ru−Cl distance of 2.416(7) Å for 1 and a Ru−OH2O distance of 2.102(6) Å for 2. DFT and TDDFT were employed to study the photophysical and photochemical properties of 1. Calculations show that dissociative metal-centered states can be related to the light-induced release of a Cl ligand and subsequent coordination of a solvent molecule. The compound showed no antiproliferative activity in three human carcinoma cell lines (lung, bladder, pancreas) under the testing conditions, either with or without irradiation with UV light.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Photochemistry, Ruthenium compounds, Chlorine compounds | ||||
Journal or Publication Title: | Organometallics | ||||
Publisher: | American Chemical Society | ||||
ISSN: | 0276-7333 | ||||
Official Date: | 1 December 2010 | ||||
Dates: |
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Volume: | Vol.29 | ||||
Number: | No.4 | ||||
Page Range: | pp. 6703-6710 | ||||
DOI: | 10.1021/om100734y | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 17 December 2015 | ||||
Date of first compliant Open Access: | 17 December 2015 | ||||
Funder: | Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC), Piedmont (Italy), European Synchrotron Radiation Facility (ESRF), Advantage West Midlands (AWM), European Regional Development Fund (ERDF), Birmingham Science City | ||||
Grant number: | 220281 (PHOTORUACD) (FP7), 247450 (ERC), CH-2948 (ESRF) |
Data sourced from Thomson Reuters' Web of Knowledge
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