The rhenium(IV) complex (NBu4)2[ReBr4(ox)] (1) (ox = oxalate and NBu4(+) tetra-n-butylammonium cation) has been prepared its crystal structure determined by X-ray diffraction. is made up of discrete [ReBr4(ox)](2-) anions bulky cations. Each anion surrounded six cations, which preclude any significant intermolecular contact between the anionic entities, shortest rhenium···rhenium distance being 9.373(1) Å. Variable temperature dc ac magnetic susceptibility measurements field-dependent...

The reaction of [ReIVCl4(ox)]2- and fully solvated Ni2+ ions in a MeCN/i-PrOH mixture affords the heterotetranuclear complex (NBu4)4[Ni{ReCl4(ox)}3] where rhenium precursor acts as bidentate ligand toward nicke(II) ion through oxalate group. mixed 3d-5d species exhibits intramolecular ferromagnetic coupling it behaves like single-molecule magnet.

The use of the mononuclear species (NBu(4))(2)[Re(IV)Cl(4)(ox)] (NBu(4)(+) = tetra-n-butylammonium cation; ox oxalate dianion) as a ligand toward fully solvated divalent first-row transition-metal ions affords tetranuclear complexes (NBu(4))(4)[{Re(IV)Cl(4)(mu-ox)}(3)M(II)] with M Mn (1), Fe (2), Co (3), Ni (4), and Cu (5). Their structure is made up discrete [{ReCl(4)(mu-ox)}(3)M](4-) anions bulky NBu(4)(+) cations. 2-5 crystallize in triclinic system space group P1; 2 5 well 3 4 are...

A magneto-structural study of two salicylamidoxime-based {Mn(6)} single-molecule magnets revealed that their anisotropy energy barriers, which can reach the current record for d-transition metal complexes, are strongly dependent upon precise arrangement ligands and solvation state.

Abstract Materials that demonstrate long-range magnetic order are synonymous with information storage and the electronics industry, phenomenon commonly associated metals, metal alloys or oxides sulfides. A lesser known family of magnetically ordered complexes monometallic compounds highly anisotropic d-block transition metals; ‘transformation’ from isolated zero-dimensional molecule to ordered, spin-canted, three-dimensional lattice being result through-space interactions arising combination...

Single-molecule magnets (SMMs) are pivotal in molecular spintronics, showing unique quantum behaviors that can advance spin-based technologies. By incorporating SMMs into magnetic tunnel junctions (MTJs), new possibilities emerge for low-power, energy-efficient data storage, memory devices and computing. This study explores how influence spin-dependent transport antiferromagnet-based MTJ spintronic (MTJMSDs). We fabricated cross-junction with an antiferromagnetic Ta/FeMn bottom electrode...

The anticancer properties of a series mononuclear Re(IV) compounds formula ReCl4L (where L is bpy = 2,2′-bipyridine; bpym 2,2′-bipyrimidine; dmbpy 4,4′-dimethyl-2,2′-bipyridine; phen 1,10-phenanthroline) were investigated for the first time. All displayed potent in vitro antiproliferative activity against selected cancer cells.

Four heterotrinuclear Re(IV)(2)M(II) compounds of general formula (NBu(4))(2)[{Re(IV)Br(4)(μ-ox)}(2)M(II)(Him)(2)] [NBu(4)(+) = tetra-n-butylammonium cation, ox oxalate, Him imidazole; M Mn (1), Co (2), Ni (3), and Cu (4)] have been synthesized by using the novel mononuclear complex [Re(IV)Br(4)(ox)](2-) as a ligand toward divalent first-row transition metal ions in presence imidazole. Compounds 1-4 are isostructural complexes whose structure contains discrete trinuclear...

Salicylamidoxime was used to synthesize 13 new polynuclear MnIII complexes. We present the crystallographic structures, magnetic susceptibility and magnetization measurements of eight them (1–8) with general formula [Mn6O2(H2N-sao)6(L)2(solvent)4–6] (L = carboxylate, chloride, 2-cyanophenolate; solvent H2O, MeOH, EtOH, py). These complexes consist two trinuclear {MnIII3(μ3-O)(H2N-sao)3}+ cationic units linked together via oximate phenolate oxygen atoms. All behave as single-molecule magnets,...

Abstract The enantiopure radical cation salts [( S , )‐DM‐BEDT‐TTF] 4 [ReCl 6 ] ([( )‐ 1 ]) and R [DM‐BEDT‐TTF = dimethylbis(ethylenedithio)tetrathiafulvalene] have been prepared by electrocrystallization of the chiral precursor DM‐BEDT‐TTF in presence NBu 5 (pyrazine)] (NBu tetra‐ n ‐butylammonium cation; pyz pyrazine) as supporting electrolyte. single‐crystal X‐ray analysis shows that compounds crystallize triclinic system, non‐centrosymmetric space group P 1, donors arrange parallel...

A device architecture utilizing a single-molecule magnet (SMM) as element between two ferromagnetic electrodes may open vast opportunities to create novel molecular spintronics devices. Here, we report method of connecting an SMM the electrodes. We utilized nickel (Ni)-AlO x -Ni magnetic tunnel junction (MTJ) with exposed side edges test bed. In present work, hexanuclear [Mn6(μ3-O)2(H2N-sao)6(6-atha)2(EtOH)6] [H2N-saoH = salicylamidoxime, 6-atha 6-acetylthiohexanoate] complex that is...

Field-induced SIM behaviour and remarkable cryomagnetic properties coexist in a well-known oxalato-bridged gadolinium(<sc>iii</sc>)-based 2D MOF.

The use of the (NBu4)2[ReIVCl4(ox)] mononuclear species as a ligand toward divalent first row transition metal ions in presence imidazole affords new trinuclear compounds formula (NBu4)2[{ReIVCl4(mu-ox)}2MII(Him)2] [NBu4+=tetra-n-butylammonium cation, ox=oxalate dianion, Him=imidazole; M=Mn (1), Co (2), Ni (3), Cu (4)] whose preparation, crystal structures, and magnetic properties are reported. 1-4 isostructural complexes which made up discrete [{ReIVCl4(mu-ox)}2MII(Him)2]2- anions bulky...

Three novel cationic hexametallic Mn(III) compounds of formulae [Mn6(μ3-O)2(H2N-sao)6(py)6(EtOH)2](ClO4)2·4EtOH (1), [Mn6(μ3-O)2(H2N-sao)6(tpy)6(H2O)2](ClO4)2·2tpy·4H2O·2EtOH (2) and [Mn6(μ3-O)2(H2N-sao)6(Him)6(EtOH)2](ClO4)2·6EtOH (3) [H2N-saoH2 = salicylamidoxime, py pyridine, tpy 4-tert-butylpyridine Him imidazole] have been synthesised magnetostructurally characterised. These [Mn6](2+) complexes are new members the oxime-based family neutral [Mn6] single-molecule magnets (SMMs) in which...

By using Vitamin B6 in its monodeprotonated pyridoxine form (PN-H) [PN = 3-hydroxy-4,5-bis(hydroxymethyl)-2-methylpyridine], two tetranuclear compounds of formula [Mn4(PN-H)4(CH3CO2)3Cl2]Cl·2CH3OH·2H2O (1) and [Cu4(PN-H)4Cl2(H2O)2]Cl2 (2) have been synthesized magneto-structurally characterized. 1 crystallizes the triclinic system with space group P1̅ whereas 2 orthorhombic Fdd2 as group. They exhibit MnII2MnIII2 CuII4 cubane cores containing four groups simultaneously acting chelating...

A new chloro-bridged heterobimetallic Cu(II)Re(IV) chain of formula {Cu(pyim)(Him)2ReCl6}n·MeCN (1·MeCN) has been prepared and magnetostructurally characterised. Compound 1 is the first example [ReIVCl6]2− anion acting as a metalloligand towards paramagnetic metal ion.

Four novel rhenium complexes of formula [ReCl4(bpym)] (1), [ReBr4(bpym)] (2) PPh4[ReCl4(bpym)] (3) and NBu4[ReBr4(bpym)] (4) (bpym = 2,2′-bipyrimidine, PPh4 tetraphenylphosphonium cation NBu4 tetrabutylammonium cation), have been synthesized their crystal structures determined by single-crystal X-ray diffraction. The 1 2 consist [ReX4(bpym)] molecules held together van der Waals forces. In both the Re(IV) central atom is surrounded four halide anions two nitrogen atoms a bpym bidentate...

A self-assembled tetrameric water cluster stabilized by [ReCl6]2− anions and [H4biim]2+ cations occurs in the new compound [H4biim][ReCl6]·4H2O, which exhibits a weak ferromagnetic coupling between Re(IV) centers through an unusual ReIV–Cl⋯(H2O)⋯Cl–ReIV pathway.

A new heterobimetallic Re(IV)Cu(II) compound has been prepared and its crystal structure determined by single-crystal X-ray diffraction; magnetic susceptibility measurements show that this behaves as a ferrimagnetic chain with significant antiferromagnetic interactions between Re(IV) Cu(II) metal ions.

Three novel Re(IV) mononuclear complexes of formulae NBu4[ReCl5(pyz)] (1), NH2Me2[ReCl5(pyz)] (2) and NH4[ReCl5(pyz)]·0.75H2O (3), (pyz being pyrazine; NBu4+ = tetra-n-butylammonium cation, NH2Me2+ dimethylammonium cation NH4+ ammonium cation), were synthesized by ligand substitution reaction from [ReCl6]2− anion pyrazine in N,N-dimethylformamide (DMF). In addition, two new heterobimetallic compounds, the salt namely [ReCl5(pyz)]2[Ni(cyclam)] (4) (cyclam 1,4,8,11-tetraazacyclotetradecane)...

A dodecanuclear copper(II) globular-shaped structure has been obtained with the cytidine nucleoside and templating carbonate anion. It shows receptor properties through anion−cation multiple anion−π interactions toward ClO4− as well an overall antiferromagnetic coupling.

The compound (NBu(4))(5)[Gd(III){Re(IV)Br(4)(μ-ox)}(4)(H(2)O)]·H(2)O (1), with intramolecular antiferromagnetic coupling, is the first Re(iv) system incorporating a 4f ion.