Heteropentanuclear Oxalato-Bridged nd–4f (n=4, 5) Metal Complexes with NO Ligand: Synthesis, Crystal Structures, Aqueous Stability and Antiproliferative Activity
Type
ArticleAuthors
Kuhn, Paul-SteffenCremer, Laura
Gavriluta, Anatolie
Jovanović, Katarina K.
Filipović, Lana
Hummer, Alfred A.
Büchel, Gabriel E.

Dojčinović, Biljana P.
Meier, Samuel M.
Rompel, Annette
Radulović, Siniša
Tommasino, Jean Bernard
Luneau, Dominique
Arion, Vladimir B.
Date
2015-08-10Online Publication Date
2015-08-10Print Publication Date
2015-09-21Permanent link to this record
http://hdl.handle.net/10754/566967
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Show full item recordAbstract
A series of heteropentanuclear oxalate-bridged Ru(NO)-Ln (4d–4f) metal complexes of the general formula (nBu4N)5[Ln{RuCl3(μ-ox)(NO)}4], where Ln=Y (2), Gd (3), Tb (4), Dy (5) and ox=oxalate anion, were obtained by treatment of (nBu4N)2[RuCl3(ox)(NO)] (1) with the respective lanthanide salt in 4:1 molar ratio. The compounds were characterized by elemental analysis, IR spectroscopy, electrospray ionization (ESI) mass spectrometry, while 1, 2, and 5 were in addition analyzed by X-ray crystallography, 1 by Ru K-edge XAS and 1 and 2 by 13C NMR spectroscopy. X-ray diffraction showed that in 2 and 5 four complex anions [RuCl3(ox)(NO)]2− are coordinated to YIII and DyIII, respectively, with formation of [Ln{RuCl3(μ-ox)(NO)}4]5− (Ln=Y, Dy). While YIII is eight-coordinate in 2, DyIII is nine-coordinate in 5, with an additional coordination of an EtOH molecule. The negative charge is counterbalanced by five nBu4N+ ions present in the crystal structure. The stability of complexes 2 and 5 in aqueous medium was monitored by UV/Vis spectroscopy. The antiproliferative activity of ruthenium-lanthanide complexes 2–5 were assayed in two human cancer cell lines (HeLa and A549) and in a noncancerous cell line (MRC-5) and compared with those obtained for the previously reported Os(NO)-Ln (5d–4f) analogues (nBu4N)5[Ln{OsCl3(ox)(NO)}4] (Ln=Y (6), Gd (7), Tb (8), Dy (9)). Complexes 2–5 were found to be slightly more active than 1 in inhibiting the proliferation of HeLa and A549 cells, and significantly more cytotoxic than 5d–4f metal complexes 6–9 in terms of IC50 values. The highest antiproliferative activity with IC50 values of 20.0 and 22.4 μM was found for 4 in HeLa and A549 cell lines, respectively. These cytotoxicity results are in accord with the presented ICP-MS data, indicating five- to eightfold greater accumulation of ruthenium versus osmium in human A549 cancer cells.Citation
Heteropentanuclear Oxalato-Bridged nd–4f (n=4, 5) Metal Complexes with NO Ligand: Synthesis, Crystal Structures, Aqueous Stability and Antiproliferative Activity 2015: Chemistry - A European JournalPublisher
WileyJournal
Chemistry - A European JournalPubMed ID
26260662Additional Links
http://doi.wiley.com/10.1002/chem.201502026Relations
Is Supplemented By:- [Dataset]
Kuhn, P.-S., Cremer, L., Gavriluta, A., Jovanović, K. K., Filipović, L., Hummer, A. A., … Arion, V. B. (2015). CCDC 1402056: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/cc1j1ym4. DOI: 10.5517/cc1j1ym4 HANDLE: 10754/624431 - [Dataset]
Kuhn, P.-S., Cremer, L., Gavriluta, A., Jovanović, K. K., Filipović, L., Hummer, A. A., … Arion, V. B. (2015). CCDC 1402057: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/cc1j1yn5. DOI: 10.5517/cc1j1yn5 HANDLE: 10754/624432 - [Dataset]
Kuhn, P.-S., Cremer, L., Gavriluta, A., Jovanović, K. K., Filipović, L., Hummer, A. A., … Arion, V. B. (2015). CCDC 951636: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/cc10y7y4. DOI: 10.5517/cc10y7y4 HANDLE: 10754/624243
ae974a485f413a2113503eed53cd6c53
10.1002/chem.201502026
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