Miguel Julve

University of Valencia, Valenza, Valencia, Spain

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Publications (485)2033.21 Total impact

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    ABSTRACT: One novel two-dimensional coordination polymer of formula [Co(dca)2(atz)2]n (1) resulted from assembling trans-bis(2-amino-1,3,5-triazine)cobalt(II) motifs by dicyanamide spacers. Variable-temperature dc and ac magnetic susceptibility measurements of 1 show that the high-spin cobalt(II) ions act as Single Ion Magnets (SIMs).
    Dalton Transactions 01/2015; · 4.10 Impact Factor
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    ABSTRACT: Two novel bidimensional coordination polymers, [Co(azbbpy)(4,4'-bipy)0.5(DMF)(NCS)2]·MeOH (1) and [Co(azbbpy)(bpe)0.5(DMF)(NCS)2]·0.25H2O (2), resulted from the assembling of cobalt(II) ions by 1,3-bis(4-pyridyl)azulene, using either 4,4'-bipyridyl or 1,2-bis(4-pyridyl)ethylene as neutral spacers. The cobalt(II) nodes in 1 and 2 act as single-ion magnets (SIMs).
    Inorganic Chemistry 12/2014; · 4.79 Impact Factor
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    ABSTRACT: A new copper(II) complex of formula {[Cu2(H2btc)2(dmf)2]·4dmf}n (1) [H4btc = 1,2,4,5-benzenetetracarboxylic acid, dmf = dimethylformamide] has been synthesised and its structure determined by X-ray diffraction. The structure displays a new square grid of “paddle-wheel” tetracarboxylate-bridged dicopper(II) units with an intradimer copper-copper separation of 2.619(2) Å. The dmf molecules are retained through weak axial coordinative bonds and hydrogen bonding interactions with the carboxylic groups of the porous neutral network of 44 net topology. The magnetic behaviour of 1 corresponds to a strong antiferromagnetic coupling within each dicopper(II) unit (J = –343 cm-1 with the Hamiltonian being defined by H = -JS1·S2). Complex 1 does not adsorb N2 but it exhibits certain absorption of CO2 with a hysteretic desorption behaviour typical of flexible MOFs.
    Polyhedron 12/2014; 87:220-225. · 2.05 Impact Factor
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    ABSTRACT: The molecular-programmed approach based on the use as ligands of tailor-made metalloligands containing stable six-coordinate rhenium(IV) as paramagnetic centers is presented in this review article. A relatively large amount of spin density is covalent-delocalized away from the rhenium to the peripheral atoms of the ligands in the case of the Re(IV) metalloligands, as shown by polarized neutron diffraction experiments and density functional theory calculations. This feature accounts for the significant through space-magnetic interactions that occur in most of its mononuclear species and more interestingly it also explains the strengthening of the magnetic interactions in the heterometallic Re(IV)-X-3d units respect to the 3d’-X-3d ones, X being a mono- or polyatomic bridging ligand. The complexing ability of the mononuclear Re(IV) species having halo- and pseudohalogeno, cyanide and dicarboxylate groups as peripheral ligands towards either fully solvated metal ion or partially blocked metal complexes allowed the rational preparation of heterometallic compounds with controlled dimensionality and interesting magnetic properties. The variety and a priori easy functionalization of the peripheral donors of these stable Re(IV) precursors, together with their potential bridging ability make them very promising candidates to create multifunctional molecule-based magnetic materials in a very near future.
    Coordination Chemistry Reviews 11/2014; · 12.10 Impact Factor
  • Journal of Coordination Chemistry 11/2014; · 2.22 Impact Factor
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    ABSTRACT: Graphical abstract The complex formation of Co(II) and Cu(II) ions with the monoethyl ester derivative of the N-(4-carboxyphenyl)oxamic acid yielded different coordination polymers whose structures and variable-temperature magnetic study are presented here.
    Polyhedron 10/2014; 81:105–114. · 2.05 Impact Factor
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    ABSTRACT: Two new dinuclear copper(II) metallacyclophanes with 1,4-disubstituted 9,10-anthraquinonebis(oxamate) bridging ligands are reported that can reversibly take and release electrons at the redox-active ligand and metal sites, respectively, to give the corresponding mono- and bis(semiquinonate and/or catecholate) CuII2 species and mixed-valent CuII/CuIII and high-valent CuIII2 ones. Density functional calculations allow us to give further insights on the dual ligand- and metal-based character of the redox processes in this novel family of antiferromagnetically coupled di- copper(II) anthraquinophanes. This unique ability for charge storage could be the basis for the development of new kinds of molecular spintronic devices, referred to as molecular magnetic capacitors (MMCs).
    Chemistry - A European Journal 09/2014; · 5.93 Impact Factor
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    ABSTRACT: The six-coordinate cobalt(II) complex of formula [Co(tppz)2](tcm)2 exhibits a thermally induced spin-crossover behavior from a high spin (S = (3)/2) at higher temperatures to a low spin (S = (1)/2) at lower temperatures, with the low-spin phase being achieved at T ≤ 200 K.
    Inorganic Chemistry 09/2014; · 4.79 Impact Factor
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    ABSTRACT: Single crystals of the mononuclear bis-oxamate nickel(II) complex [Ni(bipy)(H 2 edpba)]·dmso (1) are obtained by reacting [Ni(bipy)Cl 2 ]·H 2 O and the flexible K 2 (H 2 edpba) ligand [ b i p y = 2 , 2 ′ -b i p y r i d i n e ; H 4 e d p b a = N , N ′ -2 , 2 ′ -ethylenediphenylenebis(oxamic acid)]. The reaction of 1 with copper(II) ions resulted in two products in which the replacement of the nickel(II) ion by copper(II) took place: the chain compound [Cu(bipy)(H 2 edpba)] n ·3nH 2 O·ndmso [dmso = dimethyl sulfoxide] (2) and the analogous chain compound without dmso crystallization molecules [Cu(bipy)(H 2 edpba)] n ·1.5nH 2 O (3a) in its polycrystal-line form. The reaction of [Cu(bipy)Cl 2 ] and K 2 (H 2 edpba) yielded single crystals of [Cu(bipy)(H 2 edpba)] n ·1.5nH 2 O (3b). The H 2 edpba 2− ligand exhibits the anti conformation in 1, 2, and 3b, but it adopts different coordination modes: terminal bis-bidentate (1) and bridging bis-bidentate (2 and 3b) through the two pairs of carbonyl-oxygen atoms of the two oxamate arms. Magnetic susceptibility measurements carried out on a polycrystalline sample of 3b in the temperature range 1.9−295 K showed the occurrence of very weak intrachain antiferromagnetic interactions [J = −0.40 cm −1 , the Hamiltonian being defined as H = −J ∑ i S i ·S i+1 ], in agreement with the large values of the copper−copper separation [8.308(3) Å]. ■ INTRODUCTION The control of supramolecular architectures by handling the molecules in the solid state is one of the major challenges faced by chemists working with crystal engineering. Because the single crystal is a supramolecular structure by design, 1−4 the control of several parameters that lead to the crystallization of the desired product involves clever strategies and many trials, ranging from the choice of the appropriate building blocks to the control of the conditions for synthesis. 5−10 The effective manipulation of the solid state covalent interactions and supramolecular forces into the crystal (i.e., van der Waals interactions, hydrogen bonds, and π−π stacking) is desired by synthetic chemists dealing with crystal engineering. The literature is enriched by several publications full of notable examples in this field to guide synthetic chemists. 11−15
    Crystal Growth & Design 09/2014; 14(11). · 4.56 Impact Factor
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    ABSTRACT: Two new trinuclear copper(ii) complexes without end-capping ligands, (Bu4N)2[Cu(dmso)2{Cu(dnopba)(dmso)}2] () and (Bu4N)2[Cu(dmso)2{Cu(dcopba)(dmso)}2] () [dnopba = 4,5-dinitro-ortho-phenylenebis(oxamate), dcopba = 4,5-dichloro-ortho-phenylenebis(oxamate), Bu4N(+) = tetra-n-butylammonium and dmso = dimethylsulfoxide], were synthesized and their structures were determined by single crystal X-ray diffraction. The crystal structures of and consist of two outer bis(oxamato)(dmso)cuprate(ii) units which act as bidentate ligands toward a trans-bis(dmso)copper(ii) inner entity leading to centrosymmetric tricopper(ii) complexes with copper-copper separations across the oxamate bridges of 5.1916(3) () and 5.1776(3) Å (). The peripheral copper(ii) ions in and are five-coordinate in somewhat distorted square pyramidal environments with a dmso molecule filling the apical position whereas the inner copper(ii) ion is six-coordinate in an elongated octahedral environment with two dmso molecules in the axial sites. The investigation of their magnetic properties in the temperature range 2.0-300 K shows the occurrence of a strong intramolecular antiferromagnetic coupling between the copper(ii) ions through the oxamate bridges [J1 = -296(1) () and -334(1) cm(-1) (), the Hamiltonian being defined as Ĥ = -J1(ŜCu2·ŜCu1 + ŜCu2·ŜCu1')], which leads to a low-lying spin doublet at low temperatures. Density functional theory calculations (DFT) have been used to substantiate these magnetic couplings and also to analyse the influence exerted on these interactions by the type of substituent at the 4,5-positions from the phenylene ring of the bis(oxamate) ligand.
    Dalton Transactions 08/2014; · 4.10 Impact Factor
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    ABSTRACT: This work presents a series of layered systems based on phenylmalonate-containing copper(II) complexes and different coligands. Eight compounds [Cu(L)(Phmal)]n where L = pyrimidine (pym, 1) pyrazine (pyz, 2), 3-cyanopyridine (3-CNpy, 3), 4-cyanopyridine (4-CNpy, 4), 3-fluoropyridine (3-Fpy, 5), 3-chloropyridine (3-Clpy, 6), 3-bromopyridine (3-Brpy, 7) and 3-iodopyridine (3-Ipy, 8), have been synthesized and magneto-structurally characterized. The coligands selected not only modify the coordination environment of the metal ion, blocking or extending the polymerization, but also interact with the phenyl ring of the phenylmalonate ligand and dramatically affect the crystal packing through weak interactions. The crystallographic analysis reveals that compounds 1–8 present a corrugated square grid of carboxylate bridged copper(II) atoms where the pyridine ligands are alternatively located above and below each layer and, at the same time, inversely to the position of the phenyl group of the Phmal ligand. It is important to note that the pym and pyz ligands in 1 and 2 do not act as bridges between two copper atoms, whereas weak interactions between the cyano groups are also present in the structures of the complexes 3 and 4. The increase of the Van der Waals radius of the halogen along the series 5–8 accounts for the increase of the interlayer separation. Variable-temperature magnetic susceptibility measurements show the occurrence of different magnetic behaviours. Weak interactions are expected for the anti–syn carboxylate bridge in the out-of-plane configuration, that can be either ferro- or antiferromagnetic. Therefore, in this manuscript we shed light on the influence of the magneto-structural relationship in these square grid layered Cu(II) complexes.
    CrystEngComm 08/2014; 16(35). · 3.86 Impact Factor
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    ABSTRACT: Six new heterometallic cobalt(II)-lanthanide(III) complexes of formulas [Ln(bta)(H2O)2]2[Co(H2O)6]·10H2O [Ln = Nd(III) (1) and Eu(III) (2)] and [Ln2Co(bta)2(H2O)8]n·6nH2O [Ln = Eu(III) (3), Sm(III) (4), Gd(III) (5), and Tb(III) (6)] (H4bta = 1,2,4,5-benzenetretracaboxylic acid) have been synthesized and characterized via single-crystal X-ray diffraction. 1 and 2 are isostructural compounds with a structure composed of anionic layers of [Ln(bta)(H2O)2]n(n-) sandwiching mononuclear [Co(H2O)6](2+) cations plus crystallization water molecules, which are interlinked by electrostatic forces and hydrogen bonds, leading to a supramolecular three-dimensional network. 3-6 are also isostructural compounds, and their structure consists of neutral layers of formula [Ln2Co(bta)2(H2O)8]n and crystallization water molecules, which are connected through hydrogen bonds to afford a supramolecular three-dimensional network. Heterometallic chains formed by the regular alternation of two nine-coordinate lanthanide(III) polyhedra [Ln(III)O9] and one compressed cobalt(II) octahedron [Co(II)O6] along the crystallographic c-axis are cross-linked by bta ligands within each layer of 3-6. Magnetic susceptibility measurements on polycrystalline samples for 3-6 have been carried out in the temperature range of 2.0-300 K. The magnetic behavior of these types of Ln(III)-Co(II) complexes, which have been modeled by using matrix dagonalization techniques, reveals the lack of magnetic coupling for 3 and 4, and the occurrence of weak antiferromagnetic interactions within the Gd(III)-Gd(III) (5) and Tb(III)-Tb(III) (6) dinuclear units through the exchange pathway provided by the double oxo(carboxylate) and double syn-syn carboxylate bridges.
    Inorganic Chemistry 06/2014; · 4.79 Impact Factor
  • CrystEngComm 05/2014; · 3.86 Impact Factor
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    ABSTRACT: A novel cobalt(II) complex of formula [Co2(cbut)(H2O)3]n (1) (H4cbut = 1,2,3,4-cyclobutanetetracarboxylic acid) has been synthesized under hydrothermal conditions and its crystal structure has been determined by means of synchrotron radiation and neutron powder diffraction. The crystal structure of 1 consists of layers of cobalt(II) ions extending in the bc-plane which are pillared along the crystallographic a-axis through the skeleton of the cbut(4-) ligand. Three crystallographically independent cobalt(II) ions [Co(1), Co(2), and Co(3)] occur in 1. They are all six-coordinate with four carboxylate-oxygens [Co(1)-Co(3)] and two cis-[Co(1)] or trans-water molecules [Co(2) and Co(3)] building distorted octahedral surroundings. Regular alternating double oxo(carboxylate) [between Co(1) and Co(1a)] and oxo(carboxylate) plus one aqua and a syn-syn carboxylate bridges [between Co(1) and Co(2)] occur along the crystallographic b-axis, the values of the cobalt-cobalt separation being 3.1259(8) and 3.1555(6) Å, respectively. These chains are connected to the Co(3) atoms through the OCO carboxylate along the [01̅1] direction leading to the organic-inorganic bc-layers with Co(1)-OCO(anti-syn)-Co(3) and Co(2)-OCO(anti-anti)-Co(3) distances of 5.750(2) and 4.872(1) Å. The shortest interlayer cobalt-cobalt separation through the cbut(4-) skeleton along the crystallographic a-axis is 7.028(2) Å. Variable-temperature magnetic susceptibility measurements show the occurrence of antiferromagnetic ordering with a Néel temperature of 5.0 K, followed by a field-induced ferromagnetic transition under applied dc fields larger than 1500 Oe. The magnetic structure of 1 has been elucidated at low temperatures in zero field by neutron powder diffraction measurements and was found to be formed by ferromagnetic chains running along the b-axis which are antiferromagnetically coupled with the Co(3) ions through the c-axis giving rise to noncompensated magnetic moments within each bc-layer (ferrimagnetic plane). The occurrence of an antitranslation operation between these layers produces a weak interlayer antiferromagnetic coupling along the a-axis which is overcome by dc fields greater than 1500 Oe resulting in a phase transition toward a ferromagnetic state (metamagnetic behavior).
    Inorganic Chemistry 05/2014; · 4.79 Impact Factor
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    ABSTRACT: A novel series of heteroleptic copper(II) compounds of formulas {[Cu2(μ-H2O)(μ-pz)2(μ-bpm)(ClO4)(H2O)]ClO4·2H2O}n (1), {[Cu2(μ-H2O)(μ-3-Mepz)2(μ-bpm)](ClO4)2·2H2O}n (2), and {[Cu2(μ-OH)(μ-3,5-Me2pz)(μ-bpm)(H-3,5-Me2pz)2](ClO4)2}n (3) [bpm = 2,2'-bipyrimidine, Hpz = pyrazole, H-3-Mepz = 3-methylpyrazole, and H-3,5-Me2pz = 3,5-dimethylpyrazole] have been synthesized and structurally characterized by X-ray diffraction methods. The crystal structures of 1 and 2 consist of copper(II) chains with regular alternating bpm and bis(pyrazolate)(aqua) bridges, whereas that of 3 is made up of copper(II) chains with regular alternating bpm and (pyrazolate)(hydroxo) bridges. The copper centers are six- (1) or five-coordinate (2) in axially elongated, octahedral (1) or square-pyramidal (2) environments in 1 and 2, whereas they are five-coordinate in distorted trigonal-bipyramidal surroundings in 3. The values of the copper-copper separations across the bpm/pyrazolate bridges are 5.5442(7)/3.3131(6) (1), 5.538(1)/3.235(1) (2), and 5.7673(7)/3.3220(6) Å (3). The magnetic properties of 1-3 have been investigated in the temperature range of 25-300 K. The analysis of their magnetic susceptibility data through the isotropic Hamiltonian for an alternating antiferromagnetic copper(II) chain model [H = -J∑i=1-n/2 (S2i·S2i-1 + αS2i·S2i+1), with α = J'/J and Si = SCu = 1/2] reveals the presence of a strong to moderate antiferromagnetic coupling through the bis(pyrazolate)(aqua) [-J = 217 (1) and 215 cm(-1) (2)] and (pyrazolate)(hydroxo) bridges [-J = 153 cm(-1) (3)], respectively, whereas a strong to weak antiferromagnetic coupling occurs through the bis-bidentate bpm [-J' = 211 (1), 213 (2), and 44 cm(-1) (3)]. A simple orbital analysis of the magnetic exchange interaction within the bpm- and pyrazolate-bridged dicopper(II) fragments of 1-3 visualizes the σ-type pathways involving the (dx(2)-y(2)) (1 and 2) or d(z(2)) (3) magnetic orbitals on each metal ion, which account for the variation of the magnetic properties in these three novel examples of one-dimensional copper(II) compounds with regular alternating intrachain antiferromagnetic interactions.
    Inorganic Chemistry 05/2014; · 4.79 Impact Factor
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    ABSTRACT: New examples of cyanido-bearing cobalt(III/II) complexes have been obtained by treatment of CoCl2·6H2O with bidentate nitrogen donors and potassium cyanide in a methanol/water mixture. Depending on the chelating ligand, the cobalt(III) complexes PPh4[Co(en)(CN)4] (1, en = ethylenediamine), PPh4[Co(ampy)(CN)4]·1.5H2O [2, ampy = 2-(aminomethyl)pyridine], and PPh4[Co(phen)(CN)4]·CH3OH·0.25H2O (3, phen = 1,10-phenanthroline) and the cobalt(II) complex PPh4[Co(dmphen)(CN)3]·3H2O (4, dmphen = 2,9-dimethyl-1,10-phenanthroline) were obtained. The complexes were characterized by single-crystal X-ray diffraction and variable-temperature magnetic measurements. They are all mononuclear species with six-coordinate cobalt(III) (1–3) and five-coordinate cobalt(II) centers (4), and two nitrogen atoms from each bidentate ligand (1–4) and four (1–3) or three cyanide carbon atoms (4) build somewhat distorted octahedral (1–3) or square-pyramidal (4) surroundings. Complexes 1–3 are diamagnetic cobalt(III) compounds, whereas 4 is a low-spin cobalt(II) complex that exhibits Curie behavior in the temperature range 10–300 K. The g values of the X-band electron paramagnetic resonance (EPR) spectrum of 4 both in the solid state and in dichloromethane solution at 4.0 K (g⟂ = 2.28 > g∥ = 2.0) reveal that its unpaired electron is defined by a d-type orbital. Complexes 1–4 can be viewed as new metalloligands for metal assemblies.
    Berichte der deutschen chemischen Gesellschaft 05/2014; · 2.97 Impact Factor
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    ABSTRACT: A new chloro-bridged heterobimetallic Cu(ii)Re(iv) chain of formula {Cu(pyim)(Him)2ReCl6}n·MeCN (·MeCN) has been prepared and magnetostructurally characterised. Compound is the first example of the [Re(IV)Cl6](2-) anion acting as a metalloligand towards a paramagnetic metal ion.
    Chemical Communications 04/2014; · 6.38 Impact Factor
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    ABSTRACT: The design and synthesis of novel examples of multifunctional magnetic materials based on the so-called coordination polymers (CPs) have become very attractive for chemists and physicists due to their potential applications in nanoscience and nanotechnology. However, their preparation is still an experimental challenge, which requires a deep knowledge of coordination chemistry and large skills in organic chemistry. The recent advances in this field using a molecular-programmed approach based on rational self-assembly methods which fully exploit the versatility of the coordination chemistry of the barely explored and evergreen family of N-substituted aromatic oligo(oxamato) ligands are presented in this feature article. These exploratory studies have revealed a wide variety of interesting multifunctional magnetic materials such as optically-active chiral and luminescent magnets or dynamic porous magnets as candidates for chemical sensing. Our feeling, however, is that we have only scratched the surface of the topic and that there are many more exciting brand-new molecule-based materials waiting to be discovered.
    Chemical Communications 04/2014; · 6.38 Impact Factor
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    ABSTRACT: The enantiopure radical cation salts [(S,S)-DM-BEDT-TTF]4[ReCl6] ([(S,S)-1]4[ReCl6]) and [(R,R)-DM-BEDT-TTF]4[ReCl6] ([(R,R)-1]4[ReCl6]) [DM-BEDT-TTF = dimethylbis(ethylenedithio)tetrathiafulvalene] have been prepared by electrocrystallization of the chiral precursor DM-BEDT-TTF in the presence of NBu4[ReCl5(pyrazine)] (NBu4 = tetra-n-butylammonium cation; pyz = pyrazine) as supporting electrolyte. The single-crystal X-ray analysis shows that the compounds crystallize in the triclinic system, non-centrosymmetric space group P1, and that the donors arrange in parallel columns. The four independent donor molecules possess approximate charges of +1, +1/2, +1/2 and 0, according to the structural parameter analysis and band-structure calculations, which also support the semiconducting behaviour of the materials. The rhenium(IV) ion in both compounds is six-coordinate with six chloro atoms that describe a slightly distorted octahedral environment with Re–Cl distances that cover the short range 2.348–2.374 Å. Magnetic measurements on polycrystalline samples of [(S,S)-1]4[ReCl6] and [(R,R)-1]4[ReCl6] have been investigated in the temperature range 2–295 K. They are practically identical and confirm the presence of high-spin S = 3/2 [ReCl6]2– isolated monomers together with a Pauli paramagnetism, typical of this kind of system. The magnetic susceptibility data are thoroughly reproduced over the whole temperature range with a simple model of isolated S = 3/2 ions with a zero-field splitting plus a temperature-independent paramagnetism (TIP), and the best-fit parameters being gRe = 1.875(2), |D| = 4.50(3) cm–1 and TIP = 3630(20)×10–6 cm3 mol–1 (2D is the energy gap between the MS = ±3/2 and MS = ±1/2 Kramers doublets).
    Berichte der deutschen chemischen Gesellschaft 04/2014; · 2.97 Impact Factor
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    ABSTRACT: New and versatile bis(oxamato)palladate(II) complexes (I) are synthesized and investigated for both Suzuki and Heck coupling reactions in molten tetra-n-butylammonium bromide as ionic liquid.
    ChemInform 01/2014; 45(3).

Publication Stats

8k Citations
2,033.21 Total Impact Points


  • 1980–2014
    • University of Valencia
      • • Instituto de Ciencia Molecular (ICMol)
      • • Inorganic Chemistry
      • • Facultad de Química
      Valenza, Valencia, Spain
  • 2013
    • Federal University of Minas Gerais
      • Departamento de Química
      Belo Horizonte, Estado de Minas Gerais, Brazil
  • 2010–2013
    • UPMC
      Pittsburgh, Pennsylvania, United States
    • Polytech Paris-UPMC
      Lutetia Parisorum, Île-de-France, France
  • 2001–2012
    • University of the Republic, Uruguay
      • Facultad de Química
      Montevideo, Departamento de Montevideo, Uruguay
    • Universidad del País Vasco / Euskal Herriko Unibertsitatea
      • Departamento de Química Inorgánica
      Bilbao, Basque Country, Spain
  • 2000–2012
    • Universidad de La Laguna
      • • Department of Basic Physics II
      • • Facultad de Física
      San Cristóbal de La Laguna, Canary Islands, Spain
  • 1996–2012
    • Università della Calabria
      • Dipartimento di Chimica e Tecnologie Chimiche - CTC
      Rende, Calabria, Italy
  • 1994–2012
    • Pierre and Marie Curie University - Paris 6
      • Institut Parisien de Chimie Moléculaire (IPCM)
      Paris, Ile-de-France, France
  • 2011
    • Syracuse University
      • Department of Chemistry
      Syracuse, NY, United States
  • 2004–2010
    • University of Bucharest
      • Faculty of Chemistry
      Bucharest, Bucuresti, Romania
  • 2008
    • Justus-Liebig-Universität Gießen
      • Institut für Anorganische und Analytische Chemie
      Gießen, Hesse, Germany
  • 2007
    • University of Concepción
      • Facultad de Ciencias Químicas
      Concepción, Region del Biobio, Chile
  • 2006
    • Nottingham Trent University
      Nottigham, England, United Kingdom
  • 2001–2004
    • Università degli Studi della Basilicata
      Potenza, Basilicate, Italy
  • 1993–2001
    • University of Barcelona
      • • Departament de Química Inorgànica
      • • Department of Crystallography, Mineralogy and Mineral Deposits
      Barcelona, Catalonia, Spain
  • 1999
    • Philipps University of Marburg
      Marburg, Hesse, Germany
  • 1983–1984
    • Université Paris-Sud 11
      • Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)
      Orsay, Île-de-France, France