- Preparation method of ruthenium tetra(dimethyl sulfoxide) dichloride metalloorganic compound
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The molecular formula of a ruthenium tetra(dimethyl sulfoxide) dichloride metalloorganic compound is RuCl2 (DMSO)4, and the preparation method comprises the following steps: adding dimethyl sulfoxideinto a ruthenium reagent, reacting for 12-48 hours at the temperature of 80-90 DEG C until yellow precipitate appears, filtering to obtain a yellow solid, washing the yellow solid with acetone and diethyl ether respectively, and airing in air to obtain the ruthenium tetra(dimethyl sulfoxide) dichloride metalloorganic compound RuCl2 (DMSO)4 containing the dimethyl sulfoxide ligand. Many ruthenium metal complexes with novel structures and special functional properties can be prepared through the ruthenium tetra(dimethyl sulfoxide) dichloride metalloorganic compound, and more possibilities are provided for design and construction of functional complexes. Good potential application is realized in the aspects of molecular-based magnetic materials, nonlinear optical materials, selective catalysis, molecular recognition, gas adsorption, photoelectric materials and the like.
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Paragraph 0014-0016
(2020/12/31)
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- Tris-heteroleptic ruthenium(II) polypyridyl complexes: Synthesis, structural characterization, photophysical, electrochemistry and biological properties
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Three water-soluble tris-heteroleptic ruthenium(II) polypyridyl complexes [Ru(bpy)(phen)(bpg)]2+ (1), [Ru(bpy)(dppz)(bpg)]2+ (2), and [Ru(phen)(dppz)(bpg)]2+ (3) (where bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline, dppz = dipyrido[3,2-a:2′,3′-c] phenazine, bpg = 4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f] [1,10] phenanthroline-6,13-dione) have been synthesized and characterized. Molecular structures of complexes 1 and 3 are confirmed by single crystal X-ray structure determination. Interaction of complexes 1–3 with DNA is explored by various spectroscopic techniques. The complexes 1–3 show solvent dependent photophysical properties. Complexes 2 and 3 show extensive “molecular light switch” effect for DNA. The complexes 1–3 are low toxic towards HeLa (human cervical cancer) and HL-60 (human promyelocytic leukemia) cell lines. Further, the cellular uptake of complexes 2 and 3 by cells shows that complexes mainly localised on the nucleus of the cells.
- Bhat, Satish S.,Dixit, Ruchi,Grampp, Günter,Hey-Hawkins, Evamarie,Khan, Ayesha,Kumbhar, Avinash S.,L?nnecke, Peter,Purandare, Neeraja,Vanka, Kumar
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- Nitro reduction-based fluorescent probes for carbon monoxide require reactivity involving a ruthenium carbonyl moiety
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Recently, several arylnitro-based fluorescent CO probes have been reported. The design was based on CO's ability to reduce an arylnitro group for fluorescence turn-on. In this work, we assessed the response of three published arylnitro-based fluorescent C
- Yuan, Zhengnan,Yang, Xiaoxiao,De La Cruz, Ladie Kimberly,Wang, Binghe
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supporting information
p. 2190 - 2193
(2020/02/27)
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- Synthesis and Characterization of an Epidermal Growth Factor Receptor-Selective RuII Polypyridyl–Nanobody Conjugate as a Photosensitizer for Photodynamic Therapy
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There is a current surge of interest in the development of novel photosensitizers (PSs) for photodynamic therapy (PDT), as those currently approved are not completely ideal. Among the tested compounds, we have previously investigated the use of RuII
- Karges, Johannes,Jakubaszek, Marta,Mari, Cristina,Zarschler, Kristof,Goud, Bruno,Stephan, Holger,Gasser, Gilles
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p. 531 - 542
(2019/11/13)
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- Synthesis, characterization and biological evaluation of ruthenium flavanol complexes against breast cancer
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Four Ru(II) DMSO complexes (M1R-M4R) having substituted flavones viz. 3-Hydroxy-2-(4-methoxyphenyl)-4H-chromen-4-one (HL1), 3-Hydroxy-2-(4-nitrophenyl)-4H-chromen-4-one (HL2), 3-Hydroxy-2-(4-dimethylaminophenyl)-4H–chromen-4-one (HL3) and 3-Hydroxy-2-(4-chlorophenyl)-4H-chromen-4-one (HL4) were synthesized and characterized by elemental analysis, IR, UV–Vis, 1H NMR spectroscopies and ESI-MS. The molecular structures of the complexes were investigated by integrated spectroscopic and computational techniques (DFT). Both ligands as well as their complexes were screened for anticancer activities against breast cancer cell lines MCF-7. Cytotoxicity was assayed by MTT [3-(4, 5-dimethyl thiazol-2-yl)-2, 5-diphenyl tetrazolium bromide] assay. All ligands and their complexes exhibited significant cytotoxic potential of 5–40?μM concentration at incubation period of 24?h. The cell cytotoxicity increased significantly in a concentration-dependent manner. In this series of compounds, HL2 (IC50 17.2?μM) and its complex M2R (IC50 16?μM) induced the highest cytotoxicity.
- Singh, Ashok Kumar,Saxena, Gunjan,Sahabjada,Arshad
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- Synthesis, reactivities and anti-cancer properties of ruthenium(II) complexes with a thiaether macrocyclic ligand
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Drug resistance and severe patient side-effects of Pt drugs have spurred research into other metal-based pharmaceuticals and recently Ru complexes have been identified as promising anti-cancer drugs. A series of RuIIcomplexes [RuX2([9]aneS3)(S-dmso)] (X = Cl, Br, I, S-dmso = sulfur-bound dimethylsulfoxide) containing the neutral face-capping sulfur macrocycle ligand, 1,4,7-trithiacyclononane ([9]aneS3) was synthesized, characterized and their substitution reactions and biological activities were investigated. While the iodido complex was not sufficiently soluble for detailed studies, [RuCl2([9]aneS3)(S-dmso)] and [RuBr2([9]aneS3)(S-dmso)] were investigated to determine whether there was a direct relationship between the rates of halido ligand substitution (determined by UV/vis spectroscopy and X-ray absorption spectroscopy) and anti-cancer activities. A two-stage halido substitution process occurred in HEPES buffer (pH 7.4, 310 K). The rate constants for chlorido substitution were a factor of two larger than for the bromido analogue ((4.5 ± 0.2) × 10?4and (1.5 ± 0.1) × 10?4s?1for the chlorido complex and (2.6 ± 0.2) × 10?4and (9.2 ± 0.1) × 10?5s?1for the bromido complex). The corresponding rate constants were a factor of two to three times larger in cell culture media, but the same trends were observed. There was also a third slower reaction in media that had the same rate constant irrespective of the starting complex ((3.6 ± 0.7) × 10?5and (3.9 ± 0.3) × 10?5s?1, respectively). Neither complex exhibited significant cytotoxicity. However, both complexes exhibited anti-invasive properties to highly invasive MDA-MB-231 breast cancer cells. The more reactive chlorido complex was also the most active in the invasion assay when either the cells were treated prior to the addition to collagen matrix, or the top collagen matrix was treated with Ru after adding it to cover the cells and wound.
- O'Riley, Hannah A.,Levina, Aviva,Aitken, Jade B.,Lay, Peter A.
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supporting information
p. 128 - 138
(2016/11/19)
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- An efficient route to asymmetrically diconjugated tris(heteroleptic) complexes of Ru(ii)
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A highly efficient and versatile route to the preparation of tris(heteroleptic) Ru(ii) polypyridyl complexes is described which permits access to two or more independently conjugatable termini in the final structure. The strategy utilizes the well-known R
- Burke, Christopher S.,Keyes, Tia E.
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p. 40869 - 40877
(2016/05/19)
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- Anion receptor coordination tripods capped by [9]ane-S3
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A series of ruthenium(ii) complexes with face-capping [9]ane-S3 ligands are described. The compounds function as supramolecular receptors for anions via three tripodally arranged 3-aminopyridine ligands. The [9]ane-S 3 ligand stabilises the tripodal complexes which are more readily prepared and studied than their π-arene ruthenium(ii) analogues. Pyrenyl derivative 4 displays some activity as a photophysical anion sensor but the anion response is complicated by the complexes concentration dependent emission behaviour. The receptors bind common anions in relatively polar media forming both 1:1 and 1:2 host-anion complexes with the CH...anion interactions involving the thioether ring being implicated in anion binding as well as the convention NH donors.
- Todd, Adam M.,Swinburne, Adam N.,Goeta, Andres E.,Steed, Jonathan W.
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- Multi-nuclear NMR investigation of nickel(II), palladium(II), platinum(II) and ruthenium(II) complexes of an asymmetrical ditertiary phosphine
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Complexes synthesized by reacting alkyl and aryl phosphines with different transition metals are of great interest due to their catalytic properties. Many of the phosphine complexes are soluble in polar solvents as a result they find applications in homogeneous catalysis. In our present work we report, four transition metal complexes of Ni(II), Pd(II), Pt(II) and Ru(II) with an asymmetrical ditertiaryphosphine ligand. The synthesized ligand bears a less electronegative substituent such as methyl group on the aromatic nucleus hence makes it a strong ω-donor to form stable complexes and thus could effectively used in catalytic reactions. The complexes have been completely characterized by elemental analyses, FTIR, 1HNMR, 31PNMR and FAB Mass Spectrometry methods. Based on the spectroscopic evidences it has been confirmed that Ni(II), Pd(II) and Pt(II) complexes with the ditertiaryphosphine ligand showed cis whereas the Ru(II) complex showed trans geometry in their molecular structure.
- Raj, Joe Gerald Jesu,Pathak, Devendra Deo,Kapoor, Pramesh N.
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p. 726 - 730
(2014/02/14)
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- [RuCl2(η6-p-cymene)(P*)] and [RuCl 2(κ-P-η6-arene)] complexes containing p -stereogenic phosphines. activity in transfer hydrogenation and interactions with DNA
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The preparation of a series of half-sandwich ruthenium complexes, [RuCl2(η6-p-cymene)(P)] (P* = S-PMeRR′) and [RuCl2(κ-P-η6-arene)], containing P-stereogenic phosphines is reported. The borane-protected P-stereogenic phosphines have been obtained by addition of the (H3B)PMe 2R (R = t-Bu (1), Cy (2), Fc (3))/sec-BuLi/(-)-sparteine adduct to benzyl halides, carbonyl functions, and epoxides with yields between 40 and 90% and ee values in the 70-99% range. Those containing an aryl secondary function have been used in the preparation of [RuCl2(η6-p- cymene)(P)] complexes. Borane deprotection has been performed using HBF 4, except for (H3B)PRMe(CH2SiMe2Ph) phosphines, where DABCO was used to avoid partial cleavage of the CH 2-Si bond. In the case of (H3B)P(t-Bu)Me(CH 2C(OH)Ph2) (1l) the dehydrated phosphine was obtained. The tethered complexes were obtained by p-cymene substitution in chlorobenzene at 120 C, except for ferrocenyl-containing complexes, which decomposed upon heating. The presence of substituents in the aryl arm of some of the phosphines introduces new chiral elements in the tethered [RuCl2(κ-P- η6-arene)] compounds. Full characterization of all compounds both in solution and in the solid state has been carried out. Crystal structure determinations of four phosphine-borane molecules confirm the S configuration at the phosphorus atom (1a,e,l and 2d). Moreover, the crystal structure of one p-cymene complex (5i) and four tethered complexes reveal the strain of the compounds with two atoms in the tether (7c,g,l and 8i). Tethering has a marked effect on the catalytic performance transfer hydrogenation of acetophenone and on the nature of hydridic species originating during the activation period. The chiral induction attains 58% ee with complexes with the bulkiest substituents in the pendant arm of the phosphine. Three of the prepared complexes can interact with DNA and present a reasonable cytotoxicity toward cancer cells. Intercalation of the free aromatic pendant arm of the phosphines seems to be fundamental for such interactions.
- Aznar, Rosario,Grabulosa, Arnald,Mannu, Alberto,Muller, Guillermo,Sainz, Daniel,Moreno, Virtudes,Font-Bardia, Mercei,Calvet, Teresa,Lorenzo, Julia
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supporting information
p. 2344 - 2362
(2013/06/27)
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- Solution and solid-state spectroscopic characterization of chloro dimethylsulfoxide polythioether ruthenium(II) complexes, complemented with DFT calculations in the gas phase
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Several ruthenium(II)-chloro-dimethylsulfoxide complexes with formulae [RuCL2(DMSO)(k3-L1)] or [RuCl(DMSO)(k4-L2)]+, where L1 = [9]aneS3 (2) or ttbt (5) and L2 = [12]aneS4 (3), [14]aneS4 (4) or [14]aneN4 (6), have been synthesized from cis,fac-[RuCL2(S-DMSO)3(O-DMSO)] (1) and the respective macrocycle. They were spectroscopically characterized by FT-IR, FT-Raman, NMR, and UV/Vis. Particular attention was given to fac-[RuCL 2(DMSO)(k3-ttbt)] (5), the first octahedral complex of ttbt, which was also studied by DFT calculations. The behavior of the complexes in coordinating solvents water, acetonitrile, and dimethylsulfoxide was studied to understand their reactivity and predict the resulting ions formed in solution. The role of the counter ion (Cl- vs. PF- 6 ) was also evaluated. The results indicate that the chosen macrocycle, the counter-ion, and the solvent have a direct impact on the chemical species formed in solution.
- Madureira, Joao,Santos, Teresa M.
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p. 881 - 903
(2013/07/28)
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- Inhibition of human prion neuropeptide PrP106-126 aggregation by hexacoordinated ruthenium complexes
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Prion disease is a neurodegenerative disorder that can occur among humans and other animals. The aberrant isoform of prion protein PrPSc has been identified as the infectious agent. The neuropeptide PrP106-126 has been widely used as a suitable model to study the biological and physiochemical properties of PrPSc. PrP106-126 shares several physicochemical and biological properties with PrPSc, including cellular toxicity, fibrillogenesis, and membrane-binding affinity. Ruthenium complexes are commonly employed in anti-cancer studies due to their low cellular toxicity. In this study, six hexacoordinated ruthenium complexes with different molecular configurations were used to investigate their effects on PrP106-126 aggregation inhibition. Results revealed that the interaction between the complexes and the peptide included metal coordination and hydrophobic interaction mainly. Those complexes with aromatic structure displayed better inhibitory effects, although they only had a common binding affinity to PrP106-126. This study provided better understanding on the interaction of metal complexes with PrP106-126 and paved the way for potential Ru-based metallodrugs against prion diseases.
- Wang, Xuesong,Zhang, Bingbing,Zhao, Cong,Wang, Yanli,He, Lei,Cui, Menghan,Zhu, Xiaotong,Du, Weihong
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- Ruthenium(II/III)-based compounds with encouraging antiproliferative activity against non-small-cell lung cancer
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Hereby we present the synthesis of several ruthenium(II) and ruthenium(III) dithiocarbamato complexes. Proceeding from the Na[trans-RuIII(dmso) 2Cl4] (2) and cis-[RuII(dmso) 4Cl2] (3) precursors, the diamagnetic, mixed-ligand [RuIIL2(dmso)2] complexes 4 and 5, the paramagnetic, neutral [RuIIIL3] monomers 6 and 7, the antiferromagnetically coupled ionic α-[RuIII2L 5]Cl complexes 8 and 9 as well as the β-[RuIII 2L5]Cl dinuclear species 10 and 11 (L=dimethyl- (DMDT) and pyrrolidinedithiocarbamate (PDT)) were obtained. All the compounds were fully characterised by elemental analysis as well as 1H NMR and FTIR spectroscopy. Moreover, for the first time the crystal structures of the dinuclear β-[RuIII2(dmdt)5]BF 4·CHCl3· CH3CN and of the novel [RuIIL2(dmso)2] complexes were also determined and discussed. For both the mono- and dinuclear RuII and Ru III complexes the central metal atoms assume a distorted octahedral geometry. Furthermore, in vitro cytotoxicity of the complexes has been evaluated on non-small-cell lung cancer (NSCLC) NCI-H1975 cells. All the mono- and dinuclear RuIII dithiocarbamato compounds (i.e., complexes 6-10) show interesting cytotoxic activity, up to one order of magnitude higher with respect to cisplatin. Otherwise, no significant antiproliferative effect for either the precursors 2 and 3 or the RuII complexes 4 and 5 has been observed. Copyright
- Nagy, Eszter M.,Pettenuzzo, Andrea,Boscutti, Giulia,Marchiò, Luciano,Dalla Via, Lisa,Fregona, Dolores
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supporting information
p. 14464 - 14472
(2013/01/15)
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- Synthesis and characterization of rigid +2 and +3 heteroleptic dinuclear ruthenium(II) complexes
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Synthesis and characterization of the dinuclear ruthenium coordination complexes with heteroleptic ligand sets, [Cl(terpy)Ru(tpphz)Ru(terpy)Cl](PF 6)2 (7) and [(phen)2Ru(tpphz)Ru(terpy)Cl] (PF6)3 (8), are reported. Both structures contain a tetrapyrido[3,2-α:2′,3′-c:3″,2″-h:2″, 3″-j]phenazine (tpphz) (6) ligand bridging the two metal centers. Complex 7 was obtained via ligand exchange between, RuCl2(terpy)DMSO (5) and a tpphz bridge. Complex 8 was obtained via ligand exchange between, [Ru(phen)2tpphz](PF6)2 (4) and RuCl 2(terpy)DMSO (5). Metal-to-ligand-charge-transfer (MLCT) absorptions are sensitive to ligand set composition and are significantly red-shifted due to more electron donating ligands. Complexes 7-9 have been characterized by analytical, spectroscopic (IR, NMR, and UV-Vis), and mass spectrometric techniques. The electronic spectral properties of 7, 8, and [(phen) 2Ru(tpphz)Ru(phen)2](PF6)4 (9), a previously reported +4 analog, are presented together. The different terminal ligands of 7, 8, and 9 shift the energy of the MLCT and the π-π* transition of the bridging ligand. These shifts in the spectra are discussed in the context of density functional theory (DFT). A model is proposed suggesting that low-lying orbitals of the bridging ligand accept electron density from the metal center which can facilitate electron transfer to nanoparticles like single walled carbon nanotubes and colloidal gold.
- Alston,Kobayashi,Younts,Poler
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p. 2696 - 2702
(2011/01/05)
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- Controlled microwave synthesis of RuII synthons and chromophores relevant to solar energy conversion
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Here we describe the efficient high yield atmospheric pressure microwave-assisted synthesis for seven distinct RuII coordination complexes relevant to solar energy conversion schemes and dye sensitized solar cells. In all instances, the reaction times have been markedly shortened, concomitant with higher yields with little or no need for subsequent purification and several multi-step reactions proceeded flawlessly in a single pot. Importantly, we observed no evidence for the decarboxylation of the essential metal oxide surface-anchoring 4,4′-diethylester-2,2′-bipyridine or 4,4′-dicarboxy-2,2′-bipyridine ligands as long as open reaction vessel conditions were utilized; these functionalities are not tolerant to sealed microwave reaction (superheated solvent/pressurized) conditions. The combined results suggest that microwave-assisted chemistry is indeed a valuable tool as far as RuII coordination chemistry is concerned and can likely be applied in the combinatorial pursuit of new dyes bearing sensitive functionalities.
- Sun, Yali,Machala, Michael L.,Castellano, Felix N.
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p. 283 - 287
(2010/04/04)
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- Dimethyl sulfoxide ruthenium(II) complexes of thiosemicarbazones and semicarbazone: Synthesis, characterization and biological studies
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In an attempt to synthesize Ru(II)-dmso-thiosemicarbazone complexes, a series of carbonyl compounds were selected to condense with thiosemicarbazide in ethanol in order to get the respective thiosemicarbazone ligand as the first step. All the selected carbonyl compounds yielded the expected thiosemicarbazone ligand, but the product obtained by the reaction of benzaldehyde with thiosemicarbazide in ethanol was found to show sharp IR peak characteristic of C{double bond, long}O group and thought to be benzaldehyde semicarbazone. When the ligands were treated with cis-[RuCl2(dmso)4)] in ethanol, all the ligands yielded thiosemicarbazone complexes, while the suspected semicarbazone ligand resulted in orange-yellow crystalline product which has been found to be a semicarbazone complex by XRD studies. A mechanism has been proposed for the conversion of C{double bond, long}S to C{double bond, long}O during ligand preparation, which involves the role of adventitious water in ethanol. All the complexes were characterized by analytical and spectroscopic (IR, UV-Vis and 1H NMR) methods. The redox behaviors of the complexes were studied by cyclic voltammetry. The preliminary DNA-binding ability of the complexes was studied by recording electronic absorption spectra of the complexes in presence of herring sperm DNA. Antibacterial activities of the complexes were also been evaluated against five pathogenic bacteria.
- Mahalingam, Viswanathan,Chitrapriya, Nataraj,Fronczek, Frank R.,Natarajan, Karuppannan
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p. 2743 - 2750
(2009/02/06)
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- REDOX MEDIATORS
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The present invention relates to ruthenium and osmium complexes of Formula [M(A)w (B)x(C)y]m (Xz)n, per se and the use of ruthenium and osmium complexes of Formula I as redox mediators in electrochemical biosensors.
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Page/Page column 28-29
(2009/01/23)
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- Photochemistry of trans- and ci5-[RuCl2(dmso)4] in aqueous and nonaqueous solutions
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The photochemical behavior of the trans- and cis-[RuCl2(dmso) 4] complexes has been investigated in organic coordinating solvents (dmso, CH3CN) and aqueous solutions by means of electronic and 1H NMR spectroscopy as well as chloride-selective electrode measurements. Excitation in the UVA and visible region of the cis-[RuCl 2(dmso)4] complex in dmso leads to geometric isomerization with quantum yields Φ313 = 0.41 and Φ365 = 0.49 to give the photostable trans complex, whereas in acetonitrile and aqueous solutions, both isomerization and substitution processes occur. Moreover, in the latter two solvents, the trans isomer is photoactive and undergoes substitution reactions. In acetonitrile, for both trans- and cis-[RuCl2(dmso) 4] isomers, selective photolabilization of the dimefhylsulfoxide Ugands results in the formation of the frans-[RuCl2(CH 3CN)4] complex. In aqueous solutions, the dmso and CI - ligands are gradually substituted by water molecules to give as a final product a mixture of (aqua)ruthenium(II) and (aqua)(chlorido)ruthenium(II) complexes. These species may prove to be useful in the binding of cellular components. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
- Brindell, Malgorzata,Stochel, Grazyna,Bertolasi, Valerio,Boaretto, Rita,Sostero, Silvana
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p. 2353 - 2359
(2008/02/10)
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- BINUCLEAR METAL COMPLEX, METAL COMPLEX DYE, PHOTOELECTRIC TRANSDUCER AND PHOTOCHEMICAL BATTERY
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A novel binuclear metal complex according to the present invention is an asymmetric binuclear metal complex represented by the general formula: (L1)2M1(BL)M2(L2)2(X)n, wherein M1 and M2, which may be identical or different, represent a transition metal; L1 and L2, which are different, represent a chelate ligand capable of polydentate coordination and two L1s may be different and two L2s may be different; BL represents a bridge ligand having at least two heteroatom-containing cyclic structures, the heteroatoms contained in the cyclic structures being ligand atoms coordinating to M1 and M2; X represents a counter ion; and n is the number of counter ions needed to neutralize the charge of the complex. And the binuclear metal complex is useful as a metal complex dye.
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Page/Page column 25
(2008/06/13)
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- REDOX MEDIATORS
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The present application is directed to complexes according to Formulae (I) or (II) as described herein, and their use as redox mediators in electrochemical biosensors.
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Page/Page column 32
(2008/06/13)
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- Synthesis, molecular structure, and chemical behavior of hydrogen trans-bis(dimethyl sulfoxide)tetrachlororuthenate(III) and mer-trichlorotris(dimethyl sulfoxide)ruthenium(III): The first fully characterized chloride-dimethyl sulfoxide-ruthenium(III) complexes
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The synthesis, molecular structure and chemical behavior of two chloride-dimethyl sulfoxide-ruthenium(III) derivatives, namely [(DMSO)2H][trans-Ru(DMSO)2Cl4] (1) and mer-Ru(DMSO)3Cl3 (2), are reported. They represent the first examples of fully characterized halogen-dimethyl sulfoxide-ruthenium(III) complexes. Further relevance in their synthesis comes from the known antitumor properties of isostructural Ru(III) complexes with heterocyclic nitrogen ligands and of halogen-dimethyl sulfoxide-ruthenium(II) complexes as well. The crystal structures of 1 and 2 have been determined by three-dimensional X-ray analyses. Crystal data are as follows: [(DMSO)2H][trans-Ru(DMSO)2Cl4], monoclinic, space group P2/n, a = 9.273 (1) ?, b = 16.509 (3) ?, c = 14.023 (3) ?, β = 100.79 (2)°, Z = 4, R = 0.041; for mer-Ru(DMSO)3Cl3, monoclinic, space group P21/c, a = 10.105 (2) ?, b = 13.832 (3) ?, c = 11.115 (2) ?, β = 94.39 (2)°, Z = 4, R = 0.028. In 1 there are two crystallographically independent [Ru(DMSO)2Cl4]- anions lying on crystallographic 2-fold axes, passing through Ru and two trans Cl atoms, so that the other two Cl atoms and the two S-bonded DMSO molecules are also trans to each other. Cations are provided by protonated DMSO molecules, [Me2SO?H?OSMe2]+. In 2 the three chlorine atoms are in the mer configuration, and the two trans DMSO molecules arc S-bonded to Ru, while the third one is O-bonded. Both complexes are intermediates in the synthesis of cis-RuCl2(DMSO)4 from hydrated RuCl3. Cyclic voltammetric evidence shows that, in dimethyl sulfoxide and dichloromethane solution, 2 is in equilibrium with an isomer that very likely differs in the coordination mode of one DMSO (S- to O-bonded isomerization). The chemical behavior of 1 and 2 in aqueous solution has been studied at low pH (3(H2O)2(DMSO)]. A completely similar behavior is found in methanol.
- Alessio, Enzo,Balducci, Gabriele,Calligaris, Mario,Costa, Giacomo,Attia, Wahib M.,Mestroni, Giovanni
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p. 609 - 618
(2008/10/08)
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- Different Bonding Modes for 6-(2-Thienyl)-2,2'-bipyridine at Rutheniuim(II); the Structural Characterization of
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The ligand 6-(2-thienyl)-2,2'-bipyridine (HL) forms ruthenium complexes in which it acts as a terdentate N,N,S-donor, a bidentate N,N-donor, and in a deprotonated form a terdentate N,N,C-donor; the complex has been structurally characteri
- Constable, Edwin C.,Henney, Roland P. G.,Tocher, Derek A.
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p. 913 - 914
(2007/10/02)
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