A5079780490- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Metal complexes synthesis and properties
- Crystallography and molecular interactions
- Metal-Organic Frameworks: Synthesis and Applications
- Electron Spin Resonance Studies
- Metal-Catalyzed Oxygenation Mechanisms
- Synthesis and Characterization of Heterocyclic Compounds
- Crystal structures of chemical compounds
- Organic and Molecular Conductors Research
- Advanced NMR Techniques and Applications
- Porphyrin and Phthalocyanine Chemistry
- Organometallic Complex Synthesis and Catalysis
- Ferrocene Chemistry and Applications
- Synthesis of Tetrazole Derivatives
- Nanocluster Synthesis and Applications
- Inorganic and Organometallic Chemistry
- Supramolecular Chemistry and Complexes
- Polyoxometalates: Synthesis and Applications
- Synthesis and biological activity
- Fluorine in Organic Chemistry
- Molecular Sensors and Ion Detection
- Organometallic Compounds Synthesis and Characterization
Universidad de Granada
2016-2025
Hospital Universitario Severo Ochoa
2018
Laboratoire de Chimie de Coordination
2015
Indian Institute of Technology Bombay
2015
Indian Institute of Technology Kanpur
2015
Universitat de Barcelona
2006-2014
University of Jyväskylä
2003-2014
University of Edinburgh
2013
Ondokuz Mayıs University
2009
University of Bristol
2009
The discovery of the first Single-Molecule Magnet, Mn12-ac, in 1993 changed perspective how information can be stored. current bit, occupying few hundreds nanometers present devices, would minimized to tens angstroms at molecular level. However, until a couple years these materials could only operate temperatures near absolute zero. From date, field Magnets (SMMs) has continuously evolved thanks close collaboration chemists and physicists obtaining already operating above liquid nitrogen...
A magnetic Co-production: The complex [Co(μ-L)(μ-OAc)Y(NO3)2] (see structure O red, N blue, C gray), in which the CoII ion exhibits a D value of approximately +45 cm−1, as determined by and inelastic neutron scattering experiments, slow relaxation single-ion magnet behavior.
Tridentate Schiff-base carboxylate-containing ligands, derived from the condensation of 2-imidazolecarboxaldehyde with amino acids beta-alanine (H2L1) and 2-aminobenzoic acid (H2L5) 2-pyridinecarboxaldehyde (HL2), D,L-3-aminobutyric (HL3), 4-aminobutyric (HL4), react copper(II) perchlorate to give rise helical-chain complexes [[Cu(mu-HL1)(H2O)](ClO4)]n (1), [[Cu(mu-L2)(H2O)](ClO4).2H2O]n (2), [[Cu(mu-L3)(H2O)](ClO4).2H2O]n (3), tetranuclear complex [[Cu(mu-L4)(H2O)](ClO4)]4 (4), mononuclear...
A mononuclear DyIII complex with a non-Schiff base compartmental ligand has been prepared and characterised by X-ray crystallography ac magnetic susceptibility measurements. The exhibits SIM behaviour induced dilution and/or field two thermally activated relaxation processes.
The dissociation of apoferritin into subunits at pH 2 followed by its re-formation 8.5 in the presence hexacyanoferrate(III) gave rise to a solution containing trapped within and outside it. addition Fe(II) dialyzed resulted appearance characteristic Prussian blue color. UV-vis spectrum this showed broad band centered 710 nm, IR contained broad-medium 2083 cm(-1). Both features are consistent with charge-transfer C[bond]N stretching mode Fe(II)[bond]CN[bond]Fe(III) fragment PB. TEM images...
Seven acetate-diphenoxo triply bridged MII-LnIII complexes (MII = NiII and LnIII Gd, Tb, Ho, Er, Y; MII ZnII HoIII ErIII) of formula [M(μ-L)(μ-OAc)Ln(NO3)2], one nitrate-diphenoxo NiII–TbIII complex, [Ni(μ-L)(μ-NO3)Tb(NO3)2]·2CH3OH, two diphenoxo doubly NiII-LnIII (LnIII Eu, Gd) [Ni(H2O)(μ-L)Ln(NO3)3]·2CH3OH have been prepared in pot reaction from the compartmental ligand N,N′,N″-trimethyl-N,N″-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylenetriamine (H2L). Moreover, bearing benzoate or...
Let there be light: Hybrid SiO2 nanoparticles with a spin-crossover polymer core and luminescent shell have been synthesized (see picture). These nanomaterials exhibit thermally induced low-spin (LS) → high-spin (HS) transition that is accompanied by drastic color change. This optical bistability tunes the luminescence properties of fluorophores grafted on surface materials.
The reaction of the multisite coordination ligand (LH4) with CoX2·nH2O in presence tetrabutylammonium hydroxide affords a series homometallic dinuclear mixed-valence complexes, [Co(III)Co(II)(LH2)2(X)(H2O)](H2O)m (1, X = Cl and m 4; 2, Br 3, NO3 3). All complexes have been structurally characterized by X-ray crystallography. Both cobalt ions these are present distorted-octahedral geometry. Detailed magnetic studies on 1-3 carried out. M vs H data at different temperatures can be fitted S...
Three triply bridged M(II)-Dy(III) dinuclear complexes, [Ni(μ-L)(μ-OAc)Dy(NO(3))(2)] 1, [Zn(μ-L)(μ-OAc)Dy(NO(3))(2)] 2, and [Ni(μ-L)(μ-NO(3))Dy(NO(3))(2)]·2CH(3)OH 3 were prepared with a new flexible compartmental ligand, N,N',N″-trimethyl-N,N″-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylene triamine (H(2)L), containing N(3)O(2)-inner O(4)-outer coordination sites. These complexes have diphenoxo/acetate (1 2) or diphenoxo/nitrate (3) asymmetric bridging fragments. Compounds 1 exhibit...
The synthesis, structure, magnetic, and luminescence properties of the Zn2Dy2 tetranuclear complex formula {(μ3-CO3)2[Zn(μ-L)Dy(NO3)]2}·4CH3OH (1), where H2L is compartmental ligand N,N',N″-trimethyl-N,N″-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylenetriamine, are reported. carbonate anions that bridge two Zn(μ-L)Dy units come from atmospheric CO2 fixation in a basic medium. Fast quantum tunneling relaxation magnetization (QTM) very effective this compound, so single-molecule magnet (SMM)...
The reaction of the compartmental ligand N,N′,N″-trimethyl-N,N″-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylenetriamine (H2L) with Zn(NO3)2·6H2O and subsequently Ln(NO3)3·5H2O (LnIII = Gd Yb) triethylamine in MeOH using a 1:1:1:1 molar ratio leads to formation tetranuclear complexes {(μ3-CO3)2[Zn(μ-L)Gd(NO3)]2}·4CH3OH (1) and{(μ3-CO3)2[Zn(μ-L)Yb(H2O)]2}(NO3)2·4CH3OH (2). When was performed absence triethylamine, dinuclear compound [Zn(μ-L)(μ-NO3)Yb(NO3)2] (3) is obtained. structures 1 2...
Abstract Two novel trinuclear complexes [ZnCl(μ‐L)Ln(μ‐L)ClZn][ZnCl 3 (CH OH)]⋅3 CH OH (Ln III =Dy ( 1 ) and Er 2 )) have been prepared from the compartmental ligand N , ′‐dimethyl‐ ′‐bis(2‐hydroxy‐3‐formyl‐5‐bromo‐benzyl)ethylenediamine (H L). X‐ray studies reveal that Ln ions are coordinated by two [ZnCl(L)] − units through phenoxo aldehyde groups, giving rise to a LnO 8 coordination sphere with square‐antiprism geometry strong easy‐axis anisotropy of ground state. Ab initio CASSCF+RASSI...
The new dinuclear ZnII–DyIII and trinuclear ZnII–DyIII-ZnII complexes of formula [(LZnBrDy(ovan) (NO3)(H2O)](H2O)·0.5(MeOH) (1) [(L1ZnBr)2Dy(MeOH)2](ClO4) (3) (L L1 are the dideprotonated forms N,N′-2,2-dimethylpropylenedi(3-methoxysalicylideneiminato 2-{(E)-[(3-{[(2E,3E)-3-(hydroxyimino)butan-2-ylidene ]amino}-2,2-dimethylpropyl)imino]methyl}-6-methoxyphenol Schiff base compartmental ligands, respectively) have been prepared magnetostructurally characterized. X-ray structure 1 indicates...
A N 6 -tripodal ligand allows the preparation of a family prismatic mononuclear cationic Co II complexes with SMM behavior. Their axial anisotropy, magnetic relaxation and hysteresis width are modulated by anion effects on crystal structure.
The reaction of M(hfac)2 with the tridentate Schiff base H2L (where stands for 1:1 condensation product 2-imidazolecarboxaldehyde β-alanine) leads to complexes [M(HL)(hfac)]n [M = MnII, NiII, and CuII; hfac hexafluoroacetylacetonate anion] (1–3). structures 1 3 have been solved by X-ray crystallographic methods. are very similar consist infinite zig-zag chains, running parallel b axis, in which metal ions bridged sequentially anti-anti carboxylate groups intrachain metal–metal distances...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and magnetic studies of a syn-anti carboxylate-bridged helix-like chain copper(II) complexEnrique Colacio, Jose Manuel Dominguez-Vera, Jean Pierre Costes, Raikko Kivekas, Laurent, Ruiz, Markku SundbergCite this: Inorg. Chem. 1992, 31, 5, 774–778Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March...
The N4O3 coordinating heptadentate ligand afforded binuclear complex [Cu2(H2L)(μ-OH)](ClO4)2 (1) and [Cu2(L)(H2O)2]PF6 (2). In 1, two copper ions are held together by μ-phenoxo μ-hydroxo bridges, whereas in 2, the centers connected only a bridge. both Cu(II) have square pyramidal geometry (τ = 0.01−0.205), case of one center has 0.2517) other based distorted trigonal bipyramidal 0.54) geometry. Complexes 1 2 show an strong intramolecular very weak antiferromagnetic interaction, respectively....
There were new dinuclear Zn(II)-Ln(III) complexes of general formulas [Zn(μ-L)(μ-OAc)Ln(NO3)2] (Ln(III) = Tb (1), Dy (2), Er (3), and Yb (4)), [Zn(μ-L)(μ-NO3)Er(NO3)2] (5), [Zn(H2O)(μ-L)Nd(NO3)3]·2CH3OH (6), [Zn(μ-L)(μ-9-An)Ln(NO3)2]·2CH3CN (7), (8), (9), Yb(10)), [Zn(μ-L)(μ-9-An)Yb(9-An)(NO3)3]·3CH3CN (11), [Zn(μ-L)(μ-9-An)Nd(9-An)(NO3)3]·2CH3CN·3H2O (12), [Zn(μ-L)(μ-9-An)Nd(CH3OH)2(NO3)]ClO4·2CH3OH (13) prepared from the reaction compartmental ligand...
Three new Dy complexes have been prepared according to a complex-as-ligand strategy. Structural determinations indicate that the central ion is surrounded by two LZn units (L(2-) di-deprotonated form of N2 O2 compartmental N,N'-2,2-dimethylpropylenedi(3-methoxysalicylideneiminato) Schiff base. The ions are nonacoordinate eight oxygen atoms from L ligands and water molecule. Zn pentacoordinate in all cases, linked L, apical position coordination sphere occupied molecule or bromide chloride...
The synthesis of a series macrocyclic, isostructural octanuclear lanthanide complexes [Gd8 (LH2)4 (μ-Piv)4 (η(2)-Piv)4 (μ-OMe)4]·6CH3OH·2H2O (1), [Tb8 (μ-OMe)4]4CH3OH·4H2O (2), [Dy8(LH2)4 (μ-OMe)4]·8CH3OH (3), and [Ho8(LH2)4(μ-Piv)4 (μ-OMe)4]·CH3OH·4H2O (4) have been achieved, using Ln(III) nitrate salts, pivalic acid, new multidentate chelating ligand (2E,N'E)-N'-(3-((bis(2- hydroxyethyl)amino)methyl)-2-hydroxy-5-methylbenzylidene)-2-(hydroxyimino) propane hydrazide (LH5), containing two...
The reaction of the lanthanide(III) chloride salts [Gd(III), Tb(III), and Dy(III)] with a new chelating, flexible, sterically unencumbered multisite coordinating compartmental Schiff-base ligand (E)-2-((6-(hydroxymethyl)pyridin-2-yl)methyleneamino)phenol (LH2) pivalic acid (PivH) in presence triethylamine (Et3N) affords series tetranuclear Ln(III) coordination compounds, [Ln4(L)4(μ2-η1η1Piv)4]·xH2O·yCH3OH (1, Ln = Gd(III), x 3, y 6; 2, 6, 2; Dy(III), 4, 6). X-ray diffraction studies reveal...
SiO<sub>2</sub>-coated Fe-triazole spin-crossover nanoparticles were functionalized with dansyl luminophores.
A mononuclear cobalt(II) complex [Co(3,5-dnb)2(py)2(H2O)2] {3,5-Hdnb = 3,5-dinitrobenzoic acid; py pyridine} was isolated in two polymorphs, space groups C2/c (1) and P21/c (2). Single-crystal X-ray diffraction analyses reveal that 1 2 are not isostructural spite of having equal formulas ligand connectivity. In both structures, the Co(II) centers adopt octahedral {CoN2O4} geometries filled by pairs mutually trans terminal 3,5-dnb, py, water ligands. However, structures disclose distinct...
The reaction of a Schiff base ligand (LH3) with lanthanide salts, pivalic acid and triethylamine in 1:1:1:3 4:5:8:20 stoichiometric ratios results the formation decanuclear Ln10 (Ln = Dy (1), Tb (2), Gd (3)) pentanuclear Ln5 complexes (4), (5), (6)), respectively. are fully governed by stoichiometry reagents used. Detailed magnetic studies on these (1-6) have been carried out. Complex 1 shows SMM behavior an effective energy barrier for reversal magnetization (Ueff) 16.12(8) K relaxation...