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Browsing by Subject "ligand"

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    • Article  

      A ligand-independent integrin β1 mechanosensory complex guides spindle orientation 

      Petridou, Nicoletta I.; Skourides, Paris A. (2016)
      Control of spindle orientation is a fundamental process for embryonic development, morphogenesis and tissue homeostasis, while defects are associated with tumorigenesis and other diseases. Force sensing is one of the ...

    • Article  

      Aerial Oxidation of a VIV-Iminopyridine Hydroquinonate Complex: A Trap for the VIV-Semiquinonate Radical Intermediate 

      Stylianou, M.; Drouza, C.; Giapintzakis, John; Athanasopoulos, G. I.; Keramidas, A. D. (2015)
      The reaction of 2,5-bis[N,N′-bis(2-pyridyl-aminomethyl)aminomethyl]-p-hydroquinone (H2bpymah) with VO2+ salts in acetonitrile or water at a low pH (2.2-3.5) results in the isolation of [VIV(O)(Cl)2(μ-bpymah)], the ...

    • Article  

      Aerial Oxidation of a VIV-Iminopyridine Hydroquinonate Complex: A Trap for the VIV-Semiquinonate Radical Intermediate 

      Stylianou, Marios; Drouza, Chryssoula; Giapintzakis, Ioannis; Athanasopoulos, Georgios I.; Keramidas, Anastasios D. (2015)
      The reaction of 2,5-bis[N,N′-bis(2-pyridyl-aminomethyl)aminomethyl]-p-hydroquinone (H2bpymah) with VO2+ salts in acetonitrile or water at a low pH (2.2-3.5) results in the isolation of [{VIV(O)(Cl)}2(μ-bpymah)], the ...

    • Article  

      Chiral ionic liquids in chromatographic and electrophoretic separations 

      Kapnissi‐Christodoulou, Constantina P.; Stavrou, Ioannis J.; Mavroudi, Maria C. (2014)
      This report provides an overview of the application of chiral ionic liquids (CILs) in separation technology, and particularly in capillary electrophoresis and both gas and liquid chromatography. There is a large number of ...

    • Article  

      Correlations of synthetic, spectroscopic, structural, and speciation studies in the biologically relevant Cobalt(II) - Citrate system: The tale of the first aqueous dinuclear Cobalt(II) - Citrate complex 

      Kotsakis, N.; Raptopoulou, C. P.; Tangoulis, V.; Terzis, A.; Giapintzakis, John; Jakusch, T.; Kiss, T.; Salifoglou, A. (2003)
      Synthetic efforts targeting soluble species of Co(II) with the low molecular mass physiological ligand citric acid led to the isolation of the first dinuclear complex [Co2(C6H5O7)2 (H2O)4]2-, at pH ∼5, in the form of its ...

    • Article  

      Detection of the His-heme Fe2+-NO species in the reduction of NO to N2O by ba3-oxidase from thermus thermophilus 

      Pinakoulaki, Eftychia; Ohta, T.; Soulimane, T.; Kitagawa, T.; Varotsis, Constantinos (2005)
      Reaction pathways in the enzymatic formation and cleavage of the N-N and N-O bonds, respectively, are difficult to verify without the structure of the intermediates, but we now have such information on the heme a3 2+-NO ...

    • Article  

      Free energy simulations come of age: Protein-ligand recognition 

      Simonson, T.; Archontis, Georgios Z.; Karplus, M. (2002)
      In recent years, molecular dynamics simulations of biomolecular free energy differences have benefited from significant methodological advances and increased computer power. Applications to molecular recognition provide ...

    • Article  

      Insertion of functional groups into a Nd 3+ metal-organic framework via single-crystal-to-single-crystal coordinating solvent exchange 

      Manos, Manolis J.; Kyprianidou, Eleni J.; Papaefstathìou, Giannis S.; Tasiopoulos, Anastasios J. (2012)
      Single-crystal-to-single-crystal (SCSC) transformations represent some of the most fascinating phenomena in chemistry. They are not only intriguing from a basic science point of view but also provide a means to modify or ...

    • Article  

      The interplay between DSL proteins and ubiquitin ligases in Notch signaling 

      Pitsouli, Chrysoula; Delidakis, Christos (2005)
      Lateral inhibition is a pattern refining process that generates single neural precursors from a field of equipotent cells and is mediated via Notch signaling. Of the two Notch ligands Delta and Serrate, only the former was ...

    • Article  

      Investigation on uranyl interaction with bioactive ligands. Synthesis and structural studies of the uranyl complexes with glycine and N-(2-mercaptopropionyl)glycine 

      Keramidas, Anastasios D.; Rikkou, Maria P.; Drouza, Chryssoula; Raptopoulou, Catherine P.; Terzis, Aris; Pashalidis, Ioannis (2002)
      Three new uranium(VI) compounds have been prepared with glycine (Hgly), N-(2-mercaptopropionyl)glycine (Hmpg) and 2,2′-dithiobis(N-propionylglycine) (tpg). The crystal structure of [UO2(Hgly)2Cl2] has been solved, revealing ...

    • Article  

      Lead halide perovskites and other metal halide complexes as inorganic capping ligands for colloidal nanocrystals 

      Dirin, D. N.; Dreyfuss, S.; Bodnarchuk, M. I.; Nedelcu, G.; Papagiorgis, Panagiotis; Itskos, Grigorios; Kovalenko, M. V. (2014)
      Lead halide perovskites (CH3NH3PbX3, where X = I, Br) and other metal halide complexes (MXn, where M = Pb, Cd, In, Zn, Fe, Bi, Sb) have been studied as inorganic capping ligands for colloidal nanocrystals. We present the ...

    • Article  

      Manganese citrate chemistry: Syntheses, spectroscopic studies, and structural characterizations of novel mononuclear, water-soluble manganese citrate complexes 

      Matzapetakis, M.; Karligiano, N.; Bino, A.; Dakanali, M.; Raptopoulou, C. P.; Tangoulis, V.; Terzis, A.; Giapintzakis, John; Salifoglou, A. (2000)
      The first two mononuclear manganese citrate complexes, (NH4)4[Mn(II)(C6H5O7)2] (1) and (NH4)5[Mn(III)(C6H4O7)2]·2H2O (2) were synthesized in aqueous solutions near physiological pH values. They were isolated in their pure ...

    • Article  

      Model investigations for vanadium-protein interactions: Vanadium(III) compounds with dipeptides and their oxovanadium(IV) analogues 

      Tasiopoulos, Anastasios J.; Tolis, Evangelos I.; Tsangaris, John Michael; Evangelou, Angelos M.; Woollins, J. D.; Slawin, A. M. Z.; Pessoa, J. C.; Correia, I.; Kabanos, Themistoklis A. (2002)
      The reaction of VCl3 with 1,10-phenanthroline and a series of dipeptides (H2dip), having aliphatic as well as aromatic side chains, in methyl alcohol and in the presence of triethylamine affords vanadium(III) compounds of ...

    • Article  

      Molybdenum(VI) coordination chemistry of the N,N-disubstituted bis(hydroxylamido)-1,3,5-triazine ligand, H2bihyat. Water-assisted activation of the MoVI=O bond and reversible dimerization of cis-[MoVIO2(bihyat)] to [MoVI2O 4(bihyat)2(H2O)2] 

      Stylianou, Marios; Nikolakis, Vladimiros A.; Chilas, G. I.; Jakusch, T.; Vaimakis, T.; Kiss, Tamás; Sigalas, Michael P.; Keramidas, Anastasios D.; Kabanos, Themistoklis A. (2012)
      Reaction of the N,N-disubstituted bis(hydroxylamino) ligand 2,6-bis[hydroxy(methyl)amino]-4-morpholino-1,3,5-triazine (H2bihyat) with cis-[MoVIO2(acac)2] in tetrahydrofuran resulted in isolation of the mononuclear compound ...

    • Article  

      New antimony(III) halide complexes with dithiocarbamate ligands derived from thiuram degradation: The effect of the molecule's close contacts on in vitro cytotoxic activity 

      Urgut, O. S.; Ozturk, I. I.; Banti, Christina N.; Kourkoumelis, Nikolaos; Manoli, Maria; Tasiopoulos, Anastasios J.; Hadjikakou, Sotiris K. (2016)
      Antimony(III) halide complexes of the formulae {[SbBr(Me2DTC)2]n} (1), {[SbI(Me2DTC)2]n} (2) and {[(Me2DTC)2Sb(μ2-I)Sb(Me2DTC)2]+.I3-} (3) (Me2DTC = dimethyldithiocarbomate) were synthesized from SbX3, (X = Br or I) and ...

    • Article  

      A new class of ferromagnetically-coupled mixed valence vanadium(IV/V) polyoxometalates 

      Manos, Manolis J.; Tasiopoulos, Anastasios J.; Tolis, Evangelos I.; Lalioti, N.; Woollins, J. D.; Slawin, A. M. Z.; Sigalas, Michael P.; Kabanos, Themistoklis A. (2003)
      Reaction of [VVIOCl2(thf)2] with a bidentate nitrogen-donor ligand (L: phen = 1,10-phenanthroline, 5-mephen = 5-methyl-1,10-phenanthroline, bipy = 2,2′-bipyridine, 5,5′-me2bipy = 5,5′-dimethyl-2,2′-bipy) in methyl alcohol, ...

    • Article  

      Nickel/lanthanide single-molecule magnets: {Ni3Ln} "stars" with a ligand derived from the metal-promoted reduction of di-2-pyridyl ketone under solvothermal conditions 

      Efthymiou, Constantinos G.; Stamatatos, Theocharis C.; Papatriantafyllopoulou, Constantina; Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Perlepes, Spyros P.; Christou, George (2010)
      Unusual {NiII3LnIII(μ-OR) 6}3+ complexes with a "star" topology have been prepared with ligands derived from the metal-promoted reduction of di-2-pyridyl ketone under solvothermal conditions

    • Article  

      NMR and theoretical investigations on the structures and dynamics of octahedral bis(chelate)dichloro VIII compounds isolated by an unusual reduction of non-oxo VIV species 

      Rikkou, Maria P.; Manos, Manolis J.; Tolis, Evangelos I.; Sigalas, Michael P.; Kabanos, Themistoklis A.; Keramidas, Anastasios D. (2003)
      Reaction of the non-oxo VIV species [VIVCl2(LOO)2] [LOO = acetylacetonate (acac-) or benzoylacetonate (bzac-)] with a chelate nitrogen-donor ligand LNN in acetonitrile leads to the reduction of VIV to VIII and the formation ...

    • Article  

      Observation of the equilibrium CuB-CO complex and functional implications of the transient heme a3 propionates in cytochrome ba3-CO from Thermus thermophilus. Fourier transform infrared (FTIR) and time-resolved step-scan FTIR studies 

      Koutsoupakis, Constantinos; Stavrakis, Stavros; Pinakoulaki, Eftychia; Soulimane, T.; Varotsis, Constantinos (2002)
      We report the first evidence for the existence of the equilibrium CuB 1+-CO species of CO-bound reduced cytochrome ba3 from Thermus thermophilus at room temperature. The frequency of the C-O stretching mode of CuB 1+-CO ...

    • Article  

      Pentanuclear complexes with unusual structural topologies from the initial use of two aliphatic amino-alcohol ligands in Fe chemistry 

      Kizas, Christos M.; Manos, Manolis J.; Nastopoulos, Vassilios; Boudalis, Athanassios K.; Sanakis, Yiannis; Tasiopoulos, Anastasios J. (2012)
      Five novel pentanuclear Fe 3+ clusters with the aliphatic amino-alcohol ligands 3-amino-1-propanol (Hap) and 2-(hydroxymethyl)piperidine (Hhmpip) [Fe 5(μ 3-Ο) 2(L) 4(O 2CR) 7] [L = ap -, R = Ph (1)

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