0000000001307296
AUTHOR
Adrián Sanchis-perucho
Halogen⋯halogen interactions in the self-assembly of one-dimensional 2,2′-bipyrimidine-based CuIIReIV systems
Two one-dimensional CuIIReIV coordination polymers of the general formula {[ReIVCl4(μ-bpym)CuIIX2]·solvent}n [where bpym = 2,2′-bipyrimidine, X = Cl (1) and Br (2), and solvent = H2O (1) and CHCl3 (2)] have been prepared and characterised structurally and magnetically. Both compounds crystallise in the monoclinic system with space groups P21/c (1) and P21/n (2). Each CuII ion is bonded to two cis nitrogen atoms from the bpym ligand and to four halogen atoms. Two of these halogen atoms are placed in the equatorial plane and the other two are filling the axial positions of the CuII ion, thus generating a distorted octahedral environment for this metal ion in 1 and 2. In both compounds, the Re…
Field-induced slow relaxation of magnetisation in an anionic heterotetranuclear [ZnIIReIV3] system
The compound (NBu4)4[ZnII{ReIVCl4(μ-ox)}3] (1) [NBu4+ = tetra-n-butylammonium cation and ox2− = oxalate dianion] is the first example of an oxalato-bridged ZnII system coordinated to a 5d metal ion that exhibits slow relaxation of magnetisation.
Coexistence of metamagnetism and slow relaxation of magnetization in ammonium hexafluoridorhenate.
The (NH4)2[ReF6] (1) salt was studied by X-ray diffraction, Raman spectroscopy, theoretical calculations, and magnetic measurements. 1 crystallizes in the trigonal space group Pm1 (Re–F = 1.958(5) A). In the Raman spectrum of 1, splitting of the observed peaks was observed and correlated to the valence frequencies of vibration of the [ReF6]2− anion. The study of the magnetic properties of 1, through DC and AC magnetic susceptibility measurements, reveals the coexistence of metamagnetism and slow relaxation of magnetization at low temperature, which is unusual in the molecular systems based on the paramagnetic 5d metal ions reported so far.
Ferromagnetic exchange interaction in a new Ir(iv)-Cu(ii) chain based on the hexachloroiridate(iv) anion.
The iridium(IV) complex (NBu4)2[IrCl6] (1) has been synthetised, characterised and used as a precursor to prepare the new chloro-bridged heterobimetallic IrIV–CuII chain of formula {IrCl5(μ-Cl)Cu(viim)4}n (2) [viim = 1-vinylimidazole]. The crystal structure and magnetic properties of 1 and 2 have been investigated. Both compounds crystallise in the monoclinic system with space group C2/c. Each IrIV ion in both 1 and 2 is six-coordinate and bonded to six chloride ions in a regular octahedral geometry. In compound 2, the CuII ion exhibits an axially elongated octahedron with four N atoms, from four monodentate viim ligands, that form the equatorial plane, and two chloride ions that occupy the…
Synthesis and characterisation of a novel ferrimagnetic chain based on copper(II) and rhenium(IV)
Abstract A novel one-dimensional copper(II)–rhenium(IV) coordination polymer of formula {[ReIVBr4(μ-ox)CuII(pyim)2]·MeCN}n (1) [ox = oxalate anion, pyim = 2-(2′-pyridyl)imidazole] has been prepared and characterised. Powder X-ray diffraction measurements on a sample of 1 support the purity of the bulk sample, whereas single-crystal X-ray diffraction shows that 1 crystallises in the orthorhombic system with space group Pbca. The crystal structure of 1 is made up of [CuII(pyim)2]2+ cations and [ReBr4(ox)]2− anions linked through bridging bromide and oxalate groups, which generate alternating CuII and ReIV chains. Variable-temperature magnetic susceptibility measurements performed on 1 reveal …
Hexahalorhenate(iv) salts of protonated ciprofloxacin: antibiotic-based single-ion magnets
Two novel Re(IV) compounds of formula [H2cip][Hcip][ReCl6]Cl·H2O (1) and [Hcip]2[ReBr6] (2) [(H2cip)2+/(Hcip)+ = ciprofloxacindiium cation / ciprofloxacinium cation] have been synthesized and studied structurally and magnetically. 1 crystallizes in the monoclinic system with space group P21/c, whereas 2 crystallizes in the orthorhombic system with space group Pbca. 1 and 2 are hexahalorhenate(IV) salts obtained with the protonated ciprofloxacin antibiotic. In their crystal lattice, the [ReX6]2− [X = Cl(1) and Br(2)] anions are well separated from each other through the protonated ciprofloxacindiium (1) and ciprofloxacinium (1 and 2) cations, which are arranged without generating intermolecu…
Holmium(III) Single-Ion Magnet for Cryomagnetic Refrigeration Based on an MRI Contrast Agent Derivative
The coexistence of field-induced blockage of the magnetization and significant magnetocaloric effects in the low-temperature region occurs in a mononuclear holmium(III) diethylenetriamine-N,N,N′,N″,N″-pentaacetate complex, whose gadolinium(III) analogue is a commercial MRI contrast agent. Both properties make it a suitable candidate for cryogenic magnetic refrigeration, thus enlarging the variety of applications of this simple class of multifunctional molecular nanomagnets.
CCDC 1848843: Experimental Crystal Structure Determination
Related Article: Donatella Armentano, Adrián Sanchis-Perucho, Carlos Rojas-Dotti, José Martínez-Lillo|2018|CrystEngComm|20|4575|doi:10.1039/C8CE00996A
CCDC 1848844: Experimental Crystal Structure Determination
Related Article: Donatella Armentano, Adrián Sanchis-Perucho, Carlos Rojas-Dotti, José Martínez-Lillo|2018|CrystEngComm|20|4575|doi:10.1039/C8CE00996A
CCDC 1922348: Experimental Crystal Structure Determination
Related Article: Adrián Sanchis-Perucho, José Martínez-Lillo|2019|Dalton Trans.|48|13925|doi:10.1039/C9DT02884F
CCDC 1885666: Experimental Crystal Structure Determination
Related Article: Carlos Rojas-Dotti, Adrián Sanchis-Perucho, Marta Orts-Arroyo, Francesc Lloret, José Martínez-Lillo|2019|Comptes Rendus Chimie|22|490|doi:10.1016/j.crci.2019.04.004
CSD 1962857: Experimental Crystal Structure Determination
Related Article: James Louis-Jean, Samundeeswari M. Balasekaran, Keith V. Lawler, Adrián Sanchis-Perucho, José Martínez-Lillo, Dean Smith, Paul M. Forster, Ashkan Salamat, Frederic Poineau|2021|RSC Advances|11|6353|doi:10.1039/D0RA10325J
CCDC 1866320: Experimental Crystal Structure Determination
Related Article: Adrián Sanchis-Perucho, Carlos Rojas-Dotti, Nicolás Moliner, José Martínez-Lillo|2019|Dalton Trans.|48|370|doi:10.1039/C8DT03728K
CCDC 1922347: Experimental Crystal Structure Determination
Related Article: Adrián Sanchis-Perucho, José Martínez-Lillo|2019|Dalton Trans.|48|13925|doi:10.1039/C9DT02884F