The syntheses, X-ray structures, and magnetic behaviors of two new cyano-bridged assemblies, the molecular [Mn(III)(salen)H2O]3[W(V)(CN)8].H2O (1) one-dimensional [Mn(salen)(H2O)2]2[[Mn(salen)(H2O)][Mn(salen)]2[Mo(CN)(8)]].0.5ClO4.0.5OH.4.5H2O (2), are presented. Compound 1 crystallizes in monoclinic system, has space group P2(1)/c, unit cell constants a = 13.7210(2) A, b 20.6840(4) c 20.6370(2) Z 4. 2 triclinic P, dimensions 18.428(4) 18.521(3) 18.567(4) 2. structure consists asymmetric...

The self-assembly reaction between trivalent lanthanide ions, 2,2':6',2' '-terpyridine (terpy) ligand, and octacyanotungstate(V) leads to the formation of two series isomorphous cyano-bridged compounds: (i) one-dimensional (1-D) chains [Ln(terpy)(DMF)(4)][W(CN)(8)].6H(2)O.C(2)H(5)OH (Ln = Ce-Dy) (ii) dinuclear molecules [Ln(terpy)(DMF)(2)(H(2)O)(2)][W(CN)(8)].3H(2)O Ho, Er, Yb) ionic [Tm(III)(terpy)(DMF)(2)(H(2)O)(3)][WV(CN)(8)].4H(2)O.DMF (DMF N,N-dimethylformamide) system. crystal...

We present an overview of very recent advances in the engineering magnetic networks based on octacyanometalates. The selected CuIIWV, NiIIWV and MnIILNbIV (L – organic bridging linker) illustrate possible strategies for tuning characteristics. combination ordering 2D (two-dimensional) 3D (three-dimensional) together with solvent sensitivity a cyano-bridged framework resulted development novel {[MnII(imH)]2[NbIV(CN)8]} assembly sponge character, characterized by Tc 62 K, highest ever observed...

The reaction of Co(OAc)2·6H2O with 2,2′-[{(1E,1′E)-pyridine-2,6-diyl-bis(methaneylylidene)bis(azaneylylidene)}diphenol](LH2) a multisite coordination ligand and Et3N in 1:2:3 stoichiometric ratio forms tetranuclear complex Co4(L)2(μ-η1:η1-OAc)2(η2-OAc)2]· 1.5 CH3OH· CHCl3 (1). Based on X-ray diffraction investigations, 1 comprises distorted Co4O4 cubane core consisting two completely deprotonated ligands [L]2– four acetate ligands. Two distinct types CoII centers exist the complex, where...

The self-assembly of [NbIV(CN)8]4− with different 3d metal centers in an aqueous solution and excess pyrazole resulted the formation four 3D isostructural compounds {[MII(pyrazole)4]2[NbIV(CN)8]·4H2O}n, where MII = Mn, Fe, Co, Ni for 1−4, respectively. All assemblies crystallize same I41/a space group show identical cyanido-bridged structures decorated molecules coordinated to centers. also long-range magnetic ordering below 24, 8, 6, 13 K, A thorough analysis structural data utilizing...

Two chiral luminescent derivatives of pyridine bis(oxazoline) (Pybox), (SS/RR)-iPr-Pybox (2,6-bis[4-isopropyl-2-oxazolin-2-yl]pyridine) and (SRSR/RSRS)-Ind-Pybox (2,6-bis[8H-indeno[1,2-d]oxazolin-2-yl]pyridine), have been combined with lanthanide ions (Gd(3+), Nd(3+)) octacyanotungstate(V) metalloligand to afford a remarkable series eight bimetallic CN(-)-bridged coordination chains: {[Ln(III)(SS/RR-iPr-Pybox)(dmf)4]3[W(V)(CN)8]3}n ⋅dmf⋅4 H2O (Ln = Gd, 1-SS 1-RR; Ln Nd, 2-SS 2-RR)...

The reaction between Ln(NO3)3*xH2O, Cs3[W(V)(CN)8]*H2O and 2,2':6',2''-terpyridine (terpy) leads to the original isomorphous cyano-bridged [Ln(III)(terpy)(DMF)4][W(V)(CN)8] *6H2O [Ln = Gd (1), Sm (2)] 1-D chains. crystal structures of {Ln(III)W(V)} chains consist alternating {[W(CN)8]} {[Ln(terpy)]} building blocks. neighbouring are weakly linked through pi-pi stacking interactions aromatic rings leading 2-D supramolecular layers. layers hydrogen bonds H2O molecules terminal cyano ligands....

To understand the role of intramolecular degrees freedom in forming mesophases, thermodynamic analysis was performed for 4-n-alkyl-4′-isothiocyanatobiphenyl (nTCB, n is number carbon atoms alkyl group), which exhibits crystal E (CrE) phase as a mesophase. The heat capacities 2TCB and 5TCB were measured by adiabatic calorimetry. Their entropies transition (ΔtrsS) compared with those other nTCBs (n ≤ 10). ΔtrsS from ordered to CrE increased their chain length, whereas that fusion remained...

Octacyanometallate-based compounds displaying a rich pallet of interesting physical and chemical properties, are key materials in the field molecular magnetism. The [M(CN)8]n− complexes, (M = WV, MoV, NbIV), universal building blocks as they lead to various spatial structures, depending on surrounding ligands choice metal ion. One functionalities octacyanometallate-based coordination polymers or clusters is magnetocaloric effect (MCE), consisting change material temperature upon application...

Environmental management of cellulose production waste and municipal sewage sludge appears to be substantiated due various physicochemical properties these wastes. The aim the conducted research was determine effect on yielding heavy metal uptake by a plant mixture. under field experiment conditions, determining fertilizer value wastes in environmental aspect. carried out years 2013-2016. Species composition mixture adjusted habitat conditions. It established that, as compared with waste,...

Abstract We report the synthesis and structural, spectroscopic magnetic properties of new 1D coordination polymeric complex {[Cu( μ- l- Arg) 2 ]SO 4 ⋅1.5H O} n ( 1 ) that contains asymmetric μ −O,O’ carboxylic bridge linking distorted square-pyramidal [Cu( ] 2+ units. In 1D, syn − anti η : zigzag polymer conformation, adjacent Cu(II) ions are distanced by 5.707 Å, subsequent Cu∙∙∙Cu proximity in 1D-coordination chain equals 6.978 Å. Detailed interpretation IR Raman spectra arginine was...

The reaction of Co(OAc)2·4H2O, LH2, and Et3N in a 1.5:1:3 molar ratio affords linear trinuclear complex, [Co3(L)2(μ-η1: η1-OAc)2(CH3CN)2] (1). synthesized complex was characterized by single crystal X-ray diffraction studies, it exhibited better electrocatalytic activity for the oxygen evolution (OER) compared with catalyst, RuO2. exhibits an overpotential 380 mV at 10 mA cm–2 current density OER, which is than that RuO2 (480 mV) under identical experimental conditions. Tafel slope values...

We have synthesized the octacyanoniobate-based cyano-bridged 3D ferromagnet {[FeII(H2O)2]2[NbIV(CN)8]·4H2O}n1 and characterized structurally, spectroscopically (XANES/EXAFS, IR, UV-Vis, Resonance Raman, 57Fe Mössbauer spectroscopy) magnetically. 1 crystallizes in tetragonal system, space group I4/m, a = 11.989(5) Å, c 13.237(5) V 1902.6(13) Å3. coordination architecture comprises two types of NbIV–C–N–FeIIHS (HS high spin) linkages with Fe–N–C angles 154.5° 167.5°. The XANES/EXAFS spectra at...

A series of isostructural C3-symmetrical triple stranded dinuclear lanthanide [Ln2L3](NO3)3 molecules have been synthesized using subcomponent self-assembly Ln(NO3)3 with 2-(methylhydrazino)benzimidazole and 4-tert-butyl-2,6-diformylphenol, where Ln = Tb (1), Dy (2), Ho (3), Er (4), Tm (5), Yb (6). The temperature dependent field magnetic properties 1-6 were modeled the van Vleck approximation including crystal term HCF, super-exchange HSE Zeeman HZE. Ferromagnetic interactions found in 1,...

A novel two-dimensional cyanide-bridged polymer [CuII(tren)]{CuI[W(V)(CN)8]} . 1.5H2O (tren = tris(2-aminoethyl)amine) formed via the simultaneous in situ metal-ligand redox reaction of [Cu(tren)(OH2)]2+ and self-assembly with [W(V)(CN)8]3- consists a {CuI[W(V)(CN)8]} square grid built CuI centres tetrahedral geometry coordinatively saturated by CN bridges capped [CuII(tren)]2+ moieties; it exhibits ferromagnetic coupling J1 +5.8(1) cm(-1) within CuII-W(V) dinuclear subunits weak...

The results of mid-infrared spectroscopy and X-ray studies the third member 4-n-alkyl-4'-isothiocyanatobiphenyl (nTCB) homologous series are presented. Correspondence between phase transitions observed by means IR those given adiabatic calorimetry was found. structure five solid phases obtained measurements. spectroscopic data give arguments supporting identification glass smectic E phase. Assignment vibrational bands, in E, one crystalline phases, with help hybrid B3LYP/6-311++G(d,f)...

The reaction of cerium(III) nitrate, sodium octacyanotungstate(V), and 2,2′-bipyrimidine (bpm) under various conditions leads to the formation three new compounds: ionic [Ce2(bpm)(dmf)6(H2O)8][W(CN)8]2·3H2O (1; dmf = N,N-dimethylformamide), tetranuclear molecules [Ce2(bpm)(dmso)8(H2O)4][W(CN)8]2·4H2O (2; dmso dimethyl sulfoxide), a two-dimensional inorganic−organic hybrid coordination polymer {[Ce2(bpm)(dmf)8(H2O)2][W(CN)8]2}n·2nH2O (3), all which contain subunit [Ce2(μ-bpm)] within...

Unique one-dimensional cyanido-bridged {[EuIII(RR-Pri-Pybox)(dmf)4]3[WV(CN)8]3}n·dmf·8H2O (1-RR) and {[EuIII(SS-Pri-Pybox)(dmf)4]3[WV(CN)8]3}n·dmf·8H2O (1-SS) (Pri-Pybox = 2,2′-(2,6-pyridinediyl)bis(4-isopropyl-2-oxazoline)) chains were synthesized characterized. They combine chiral helicity with paramagnetism thermally switchable luminescence, have a great potential in the aspect of magneto-optical phenomena.

Abstract A comprehensive study of the magnetocaloric effect (MCE) in Mn 2 ‐[Nb(CN) 8 ] molecular magnet with a two‐step magnetic sponge behavior is reported. The structural transformations provoked by dehydration bring about an increase ordering temperature ( T c ) from 43 K through to 68 and up 98 K. All three phases are soft isotropic ferrimagnets. change entropy partially fully dehydrated smaller than that “as synthesized” form factor 0.6. field dependence MCE at consistent values...

Conventional (MCE) and rotating (RMCE) magnetocaloric effects have been explored in the two-dimensional (2D) coordination polymer {(tetren)H5)0.8CuII4[WV(CN)8]4·7.2H2O}n (WCu-t; tetren = tetraethylenepentamine). The unusual magnetostructural properties were exploited, including bilayered Prussian Blue like skeleton XY easy-plane magnetic anisotropy based on in-plane correlation between WV CuII spins of 1/2, underlying Berezinskii–Kosterlitz–Thouless (BKT) topological phase transition to...

We report a new bimetallic cyanido-bridged trinuclear complex [CuII(enpnen)]2[MoIV(CN)8]·6.75H2O (1) (enpnen = N,N'-bis(2-aminoethyl)-1,3-propanediamine) that shows reversible photomagnetic effect. The photo-induced increase of magnetization is characterized by the irradiation temperature-dependent shapes χM T( T) plots and different values at low temperature in high magnetic field, suggesting multiple photoexcited states. effect 1 explained through two possible processes simultaneously:...