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Browsing by Subject "Metal ions"

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    • Article  

      Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions 

      Hadjittofi, Loukia; Prodromou, Melpomeni; Pashalidis, Ioannis (2014)
      The adsorption efficiency of activated biochar prepared from cactus fibres regarding the removal of Cu(II) from aqueous solutions has been investigated as a function of various physicochemical parameters (e.g. pH, initial ...

    • Article  

      Adsorption of hexavalent chromium on dunite 

      Demetriou, Antri; Pashalidis, Ioannis (2011)
      The paper presents and discusses the effect of various physicochemical parameters (e.g. pH, ionic strength, Cr(VI) initial concentration, amount of the adsorbent, temperature and contact time between metal ion and adsorbent) ...

    • Article  

      Competitive sorption of Cu(II) and Eu(III) ions on olive-cake carbon in aqueous solutions - A potentiometric study 

      Konstantinou, M.; Pashalidis, Ioannis (2010)
      The competitive sorption of Cu(II) and Eu(III) ions from aqueous solutions by olive-cake carbon, has been investigated by potentiometry at pH 6, I = 0.1 M NaClO4, 25°C and under normal atmospheric conditions. Evaluation ...

    • Article  

      Competitive sorption of Cu(II), Eu(III) and U(VI) ions on dunite in aqueous solutions: A potentiometric study 

      Konstantinou, M.; Pashalidis, Ioannis (2010)
      The competitive sorption of Cu(II), Eu(III) and U(VI)) ions in aqueous solutions by dunite, has been investigated by potentiometry at pH 6, I = 0.1 M NaClO4 and 25°C. Numerical analysis of the experimental data supports ...

    • Article  

      Competitive sorption of Cu(II), Eu(III) and U(VI) ions on TiO2 in aqueous solutions-A potentiometric study 

      Konstantinou, M.; Pashalidis, Ioannis (2008)
      The competitive sorption of Cu(II), Eu(III) and U(VI) ions in aqueous solutions by TiO2, has been investigated by potentiometry at I = 0.1 M NaClO4, 25 °C and under atmospheric conditions. For Cu(II) ions the investigation ...

    • Article  

      Coordination Complexes of a Neutral 1,2,4-Benzotriazinyl Radical Ligand: Synthesis, Molecular and Electronic Structures, and Magnetic Properties 

      Morgan, I. S.; Mansikkamäki, Akseli; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Rouzières, M.; Tuononen, H. M.; Clérac, R. (2015)
      A series of d-block metal complexes of the recently reported coordinating neutral radical ligand 1-phenyl-3-(pyrid-2-yl)-1,4-dihydro-1,2,4-benzotriazin-4-yl (1) was synthesized. The investigated systems contain the ...

    • Article  

      Cost-Effective Polymethacrylate-Based Electrospun Fluorescent Fibers toward Ammonia Sensing 

      Petropoulou, A.; Christodoulou, K.; Polydorou, C.; Krasia-Christoforou, T.; Riziotis, C. (2017)
      The fabrication of cost-effective, polymer-based electrospun fluorescent fibrous grids and their evaluation as candidates for sensing is reported, drawing useful results on their applicability and efficiency in gas sensing ...

    • Article  

      Diol-type ligands as central 'players' in the chemistry of high-spin molecules and single-molecule magnets 

      Tasiopoulos, Anastasios J.; Perlepes, Spyros P. (2008)
      The combination of diol-type ligands with paramagnetic transition metal ions has led to the isolation of a host of new homometallic and heterometallic clusters, high-spin molecules and single molecule magnets ranging in ...

    • Article  

      Interesting copper(ii)-assisted transformations of 2-acetylpyridine and 2-benzoylpyridine 

      Kitos, Alexandros A.; Efthymiou, Constantinos G.; Manos, Manolis J.; Tasiopoulos, Anastasios J.; Nastopoulos, Vassilios; Escuer, Albert; Perlepes, Spyros P. (2016)
      The reactions of various copper(ii) sources with 2-acetylpyridine, (py)(me)CO, and 2-benzoylpyridine, (py)(ph)CO, under strongly basic conditions have been studied and novel ligand transformations have been discovered. ...

    • Article  

      Liquid expanded monolayers of lipids as model systems to understand the anionic hofmeister series: 2. Ion partitioning is mostly a matter of size 

      Leontidis, Epameinondas; Aroti, Andria (2009)
      In the preceding paper of this series [Leontidis, E.

    • Article  

      Magnetoresponsive polymer networks as adsorbents for the removal of U(VI) ions from aqueous media 

      Ilia, R.; Liatsou, I.; Savva, I.; Vasile, E.; Vekas, L.; Marinica, O.; Mpekris, F.; Pashalidis, I.; Krasia-Christoforou, T. (2017)
      Magnetoresponsive, methacrylate-based 3D polymer networks containing hydrophilic/thermoresponsive, hydrophilic/pH-responsive and hydrophobic/metal chelating functionalities and oleic acid-coated magnetite nanoparticles, ...

    • Article  

      Metal ion-assisted transformations of 2-pyridinealdoxime and hexafluorophosphate 

      Konidaris, K. F.; Polyzou, C. D.; Kostakis, G. E.; Tasiopoulos, Anastasios J.; Roubeau, O.; Teat, S. J.; Manessi-Zoupa, E.; Powell, A. K.; Perlepes, Spyros P. (2012)
      Metal-ion mediated reactions of 2-pyridinealdoxime and hexafluorophosphate lead to Zn II complexes containing picolinic acid, picolinamide and monofluorophosphate (-2) as ligands. © 2012 The Royal Society of Chemistry.

    • 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)

    • Article  

      Quantitative description and local structures of trivalent metal ions Eu(III) and Cm(III) complexed with polyacrylic acid 

      Montavon, G.; Bouby, M.; Huclier-Markai, S.; Grambow, B.; Geckeis, H.; Rabung, T.; Pashalidis, Ioannis; Amekraz, B.; Moulin, C. (2008)
      The trivalent metal ion (M(III) = Cm, Eu)/polyacrylic acid (PAA) system was studied in the pH range between 3 and 5.5 for a molar PAA-to-metal ratio above 1. The interaction was studied for a wide range of PAA (0.05 mg ...

    • Article  

      Redox chemistry of sulphate and uranium in a phosphogypsum tailings dump 

      Papanicolaou, F.; Antoniou, Stella; Pashalidis, Ioannis (2010)
      The present study aims to assess the effect of redox conditions existing within the tailings dump on the stability of phosphogypsum (e.g. sulphate reduction) and uranium(VI). Phosphogypsum sampling and in-situ measurements ...

    • Article  

      Semi-interpenetrating polymer networks with predefined architecture for metal ion fluorescence monitoring 

      Christodoulou, Kyproula; Leontidis, Epameinondas; Achilleos, Mariliz; Polydorou, Christiana S.; Krasia‐Christoforou, Theodora (2016)
      The development of new synthetic approaches for the preparation of efficient 3D luminescent chemosensors for transition metal ions receives considerable attention nowadays, owing to the key role of the latter as elements ...

    • Article  

      Semi-interpenetrating polymer networks with predefined architecture for metal ion fluorescence monitoring 

      Christodoulou, K.; Leontidis, E.; Achilleos, M.; Polydorou, C.; Krasia-Christoforou, T. (2016)
      The development of new synthetic approaches for the preparation of efficient 3D luminescent chemosensors for transition metal ions receives considerable attention nowadays, owing to the key role of the latter as elements ...

    • Article  

      Studies on the interaction of olive cake and its hydrophylic extracts with polyvalent metal ions (Cu(II), Eu(III)) in aqueous solutions 

      Konstantinou, M.; Kolokassidou, K.; Pashalidis, Ioannis (2009)
      The paper presents and discusses the chemical affinity of two different forms of natural organic matter (e.g. in solid (SOM) and soluble form (DOM)) for Cu2+ and Eu3+ ions. In the this study SOM is represented by olive ...

    • Article  

      Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes 

      Stylianou, M.; Drouza, C.; Viskadourakis, Z.; Giapintzakis, John; Keramidas, A. D. (2008)
      The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethy ...

    • Article  

      Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes 

      Stylianou, Marios; Drouza, Chryssoula; Viskadourakis, Zacharias A.; Giapintzakis, Ioannis; Keramidas, Anastasios D. (2008)
      The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethy ...

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