Walter Cañon-Mancisidor

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• PhD. in Chemistry
• Professor (Associate) at Universidad Bernardo O'Higgins

The addition of water to a chloroform solution of the Cu-6 trigonal prism complex [Cu-6(mu F-6)(mu 2OH)(mu 3OCH3)(2)(mu 2OCH3)(2)(3,5-Me(2)pz)(6)] (1) (3,5-Me(2)pz(-) = 3,5-dimethylpyrazolate) results in the formation of the Cu6 planar hexagonal ring complex [Cu-6(mu 2OH)(6)(3,5-Me(2)pz)(6)]center dot CH3CN center dot CHCl3 (2). A simple mechanism...

In the present work, the synthesis and structural characterization of four new polyoxovanadoborates (BVO) frameworks, based on the [V12B18O60H6]10- polyanion are reported: (NH4)8(1,3-diapH2)[V12B18O60H6]•5.24H2O (1), K8(NH4)2[V12B18O60H6]•18.00H2O (2), K10[V12B18O60H6]•9.50H2O (3) and K8Cs2[V12B18O60H6]•10.40H2O (4). A global antiferromagnetic beha...

Mixed-valence polyoxovanadates (POV) constitute a family of polyoxometalates whose electronic properties are still unclear. Polyoxovanadoborates (POVB) a subfamily of POV, show different electronic and magnetic properties respect of those from the POV. On the interpretation of the electronic spectra of these compounds only three bands in the 350 to...

A new family of chloroquinolinate lanthanoid complexes of formula A+[Ln(5,7Cl2q)4]-, with Ln = Y3+, Tb3+ and Dy3+ and A+ = Na+, NEt4+ and K0.5(NEt4)0.5+ is studied, both in bulk and as thin films. Several members are found to present single-molecule magnetic behavior in bulk. Interestingly, the sodium salts can be sublimed in high vacuum conditions...

Infections in confined environments can spread by direct contact, contaminated surfaces, and airborne transmission. This is critical in prison facilities, where cleaning and sanitary conditions are inadequate. An alternative is the development of antimicrobial surfaces. A new antimicrobial coating was developed by incorporating copper microparticle...

The synthesis and structural characterization of a new triangular Cu 3-µ 3 OH pyrazolato complex of formula, [Cu 3 (µ 3 −OH)(pz) 3 (Hpz) 3 ][BF 4 ] 2 (1−Cu 3), Hpz = pyrazole, is presented. The triangular unit forms a quasi-isosceles triangle with Cu-Cu distances of 3.3739(9), 3.3571(9), and 3.370(1) Å. This complex is isostructural to the hexanucl...

The synthesis and structural characterization of a new triangular Cu3-3OH pyrazolato complex of formula, [Cu3(μ3-OH)(pz)3(Hpz)3][BF4]2 (1-Cu3), Hpz = pyrazole, is presented. The triangular unit forms a quasi-isosceles triangle with Cu-Cu distances of 3.3739(9), 3.3571(9), and 3.370(1) Å. This complex is isostructural to the hexanuclear complex [Cu...

The disposition of the frustrated triangular FeIII units and their counter-anions in the crystal lattice cause a change in the magnetic response, inducing the appearance of slow relaxation of the magnetization.

Here we report the first example of nanoMIL-100 particles modified with monomeric cyclodextrin derivatives of different length by exploiting strong interactions between non-saturated iron trimers at the external surface and carboxylate functionalities located at the end of biocompatible and flexible linkers of cyclodextrins. The main results reveal...

The plasticity of the coordination chemistry of Lanthanoid ions (LnIII) has allow the design of novel coordination compounds with slow relaxation of the magnetization since the first Single Ion Magnet (SIMs) was reported by Ishikawa, who used the phthalocyaninate ligand to make a “sandwich type” complex. The coordination chemistry has allowed the p...

With the aim of identifying new cation-phenolate complexes, we herein investigated the reactivity of pyrogallol (H3pgal) with vanadium salts. A trimetallic anionic complex was identified, and found to be formed under a broad set of reaction conditions. This complex, with the formula V3O3(pgal)33-, consists of three oxovanadium(IV) units connected t...

This cover reflects the fight between two worlds.... may the forces be with you....

A series of hybrid organo-inorganic mononuclear lanthanoid complexes, [n-NBu4]3[LnH(PW11O39)(phen)2]·H2O, denoted as LM⁴-1-Ln† (Ln = DyIII, TbIII, EuIII, NdIII, ErIII, HoIII and GdIII), were synthesized via hydrothermal synthesis and were structurally characterized by X-ray diffraction. The optical properties of all complexes have been investigated...

Five pentanuclear heterometallic isostructural complexes, [Ni4Ln(L)2(LH)2(CH3CN)3Cl]·xH2O·yCH3OH {Ln = YIII (1), GdIII (2), TbIII (3), DyIII (4) and ErIII (5)} [for 1 and 2, x = 2, y = 1; for 3, x = 6, y = 2; for 4, x = 5, y = 1; for 5, x = 2, y = 2] were prepared by the reaction of (E)‐2‐(hydroxymethyl)‐6‐{[(2‐hydroxyphenyl)imino]methyl}‐4‐methylp...

New insights in the electronic properties of mixed-valence polyoxovanadoborate clusters.

The first family of hybrid mononuclear organic-inorganic lanthanoid complexes is reported, based on [PW11O39]7– and 1,10- phenathroline ligands. This hybrid approach causes a dramatic improvement of the relaxation time (x 1000) with a decrease of the optimal field while maintaining the Ueff of the inorganic analogues.

The hexanuclear compounds [Fe6O2Cl2{(py)2CO2}2(pyOH)2(pyCOO)2(ButCOO)6] (1) and [Fe6O2{(py)2CO2}2(pyCOO)4(ButCOO)6] (2) were obtained by condensation of the trinuclear μ3-oxo-centered iron(III) pivalate [Fe3O(ButCOO)6(H2O)3]⁺ in the presence of di(2-pyridyl)ketone [(py)2CO] in MeCN at ambient temperature. Both complexes contain an analogous core wh...

Two new aromatic organo-imido polyoxometalates with an electron donor triazole group ([n-Bu4N]2[Mo6O18NC6H4N3C2H2]) (1) and a highly conjugated fluorene ([n-Bu4N]2[Mo6O18NC13H9]) (2) have been obtained. The electrochemical and spectroscopic properties of several organo-imido systems were studied. These properties were analysed by the theoretical st...

We report the synthesis and structural diversity of Zn(II) metal-organic framework (MOF) with in situ formation of tetrazole ligand 3-ptz [3-ptz = 5-(3-pyridyl)tetrazolate] as a function pH. By varying the initial reaction pH, we obtain high-quality crystals of the noncentrosymmetric three-dimensional MOF Zn(3-ptz)2, mixed phases involving the zinc...

div> We report the synthesis and structural diversity of Zn(II) MOF with in situ formation of tetrazole ligand 3-ptz [3-ptz = 5-(3-pyridyl)tetrazolate], as a function pH. By varying the initial reaction pH, we obtain high-quality crystals of the non-centrosymmetric 3D MOF Zn(3-ptz)2, mixed phases involving the zinc-aqua complex [Zn(H2O)4(3-ptz)2]...

Two new lithium vanadyl oxalatophosphites have been synthesized by hydrothermal treatment. The respective formula are Li2(VOHPO3)2C2O4 6H2O (1) and Li2(VOHPO3)2C2O4 4H2O (2). The structures of the compounds have been determined by single crystal X-ray diffraction. Compound 1 crystallizes in triclinic symmetry in space group P-1, a=6.3592(2) Å, b=8....

A new tetranuclear complex Cu4, [Cu2L(OH)]2[middle dot]2CH3OH[middle dot]H2O (1), with the functionalized Schiff base ligand 2,6-bis((2-(acetylamino)phenylimino)methyl)-4-tert-butylphenol (H3L) has been obtained and characterized in the solid state by X-ray diffraction. The formation of the tetranuclear species is solvent dependent, the presence of...

In this work we report the structural and magnetic characterization of a new three-dimensional porous metal–organic framework (MOF) based on iron(III) and the formate anion, [Fe(HCO2)3]n·nHCO2H (1), which was obtained by solvothermal synthesis. The tridimensional structure crystallizes in the trigonal space group Rc and is formed by highly regular...

The magnetic properties of [(VO)(3)(mu-PO4)(2)(2,2'-bpy)(mu-OH2)]1/3H(2)O (1) and (VO)(2)H4P2O9 (2), a tubular and a layered vanadium(IV) phosphates containing triply oxido bridged V-IV dimers, are analyzed considering the Bleaney-Bowers S = 1/2 dimer model. In compound 1 the presence of an additional V-IV connected with the V-IV dimers through mu(...

A theoretical study of the magnetic properties, using density functional theory, of a family of trinuclear μ(3)-OH copper(II) complexes reported in the literature is presented. The reported X-ray crystal structures of [Cu(3)(μ(3)-OH)(aat)(3)(H(2)O)(3)](NO(3))(2)·H(2)O (HUKDUM), where aat: 3-acetylamine-1,2,4-triazole; [Cu(3)(μ(3)-OH)(aaat)(3)(H(2)S...

Two organo-inorganic hybrid manganese(II) vanadates [Mn(phen)2(VO3)2]∞ (1) and [{Mn(bipy)(VO3)2}{VO2(bipy)}(VO3)(V2O6)]∞ (2) were synthesized hydrothermally. Compound 1 is a chain consisting in VO3 units propagating along the b axis, decorated with {Mn(phen)2}+2 subunits. Compound 2 is a ladder like structure propagating along the a axis, consistin...

Experimental redox potentials of the couples [Cu(R-L ( n ))(CH 3CN)] (2+,+), where L (1) is bis-(pyridine-2-ylmethyl)-benzylamine, L (2) is (pyridine-2-ylethyl)(pyridine-2-ylmethyl)-benzylamine, and R is H, Me, or CF 3, were determined in dichloromethane solution. The compounds exhibited one simple quasi-reversible wave over the measured potential...