Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Zhang, Lei; Ge, Y. Y.; Peng, Feng; Du, Miao

doi:10.1016/j.inoche.2006.01.020

Cited by 19 publications

(3 citation statements)

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“…The characteristic bands of the presence of the pyim ligand are also observed: sharp absorptions at ca. 3150 cm –1 (N–H stretching), a multiplet in the wavelength range of 2900–2750 cm –1 (C–H stretching), and high-intensity and multistructured bands in the 1675–1550 cm –1 region (ring stretching modes). − , …”

Section: Resultsmentioning

confidence: 99%

“…An alternative route to design cyanido-bridged d–f oligonuclear species or chains is the use of an auxiliary ligand that can block several coordination sites of the lanthanide(III) ions. − For example, in the case of cyanido-bridged {Ln III M V } complexes, the tridentate 2,2′:6′,2″-terpyridine (terpy) ligand favored the formation of binuclear and chain structures, , while the bis-bidentate 2,2′-bipyrimidine (bpym) molecule in its reaction with cerium(III) and {W V (CN) 8 } 3– ions afforded tetranuclear complexes, where the polyazine ligand bridges the rare-earth cations . By using pyridine bis(oxazoline)-type molecules as capping ligands, magneto-chiral and/or luminescent cyanido-bridged {Ln III W V } chains were obtained. ,, From the rich library of chelating pyridine-based agents, the 2-(1 H -imidazol-2-yl)-pyridine (pyim) molecule proved to be a versatile ligand toward transition metal ions, being able to adopt bidentate − and bridging bis-monodentate (under imidazole deprotonation) coordination modes or having a functional role in the iron(II) spin-crossover complexes. − To our knowledge, there is no example of pyim-containing lanthanide(III) complexes.…”

Section: Introductionmentioning

confidence: 99%

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Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

et al. 2017

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A new series of cyanido-bridged {LnW} heterobinuclear complexes of formula [Ln(pyim)(i-PrOH)(HO)(μ-CN)W(CN)]·2HO [Ln = Gd (1), Tb (2), Dy (3), Ho (4), and Er (5); pyim = 2-(1H-imidazol-2-yl)-pyridine) and i-PrOH = isopropyl alcohol] were synthesized by one-pot reaction between (NHBu)[W(CN)] and [Ln(pyim)] complexes (generated in situ by mixing the corresponding Ln ions and the pyim ligand). Compounds 1-5 are isomorphous and crystallize in the monoclinic system P2/n space group. Their crystal structure consists of binuclear units in which the octacyanotungstate(V) anion coordinates to the corresponding Ln ion through a single cyanide ligand. The tungsten(V) and lanthanide(III) ions are eight-coordinated, in distorted square antiprism (W) and distorted trigonal dodecahedron (Ln) geometries, respectively. The direct-current (dc) magnetic properties for 1-5 reveal the occurrence of weak antiferromagnetic interactions between W and Ln cation, with S, F, H, I, and I as ground terms for Gd, Tb, Dy Ho, and Er, respectively [J = -1.19(1) (1), -1.02(2) (2), -1.10(2) (3), -1.30(2) (4), and -1.50(3) cm (5), the spin Hamiltonian being defined as H = -J S·S]. The fit of the χT data of 2-4 points out a positive value for the energy gap between the M components (Δ). This feature is corroborated by their Q-band electron paramagnetic resonance spectra at low temperature, which clearly show M = 0 (2 and 4) and ±1/2 (3 and 5). Incipient frequency-dependent alternating-current magnetic susceptibility signals are observed for 3 and 5 under applied dc fields supporting the presence of slow magnetic relaxation behavior, the blocking temperatures being below 2.0 K. This new series of {LnW} heterobinuclear compounds provides more insights into the exchange magnetic interaction between 5d and 4f centers via the cyanide-bridge, for which scarce information is available to date.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

et al. 2017

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“…In recent years, research on crystalline organic−inorganic hybrid oxalates has gained great interest in materials science due to the structural diversity of these compounds which range from discrete complexes − to 1D chains, − 2D layers, , and 3D open frameworks. − Moreover, some of these materials find interesting potential applications arising from their peculiar architectures such as zeolite-like frameworks and the inherent properties of the metallic centers, for example, photoluminescence arising from the presence of lanthanides …”

Section: Introductionmentioning

confidence: 99%

Heterodimetallic Germanium(IV) Complex Structures with Transition Metals

Shi¹,

Cunha-Silva²,

Hardie³

et al. 2007

Inorg. Chem.

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The hydrothermal synthesis and structural characterization of a number of complex compounds containing the divalent tris(oxalato-O,O')germanate anion, [Ge(C2O4)3]2-, or the neutral bis(oxalate-O,O')germanium fragment, [Ge(C2O4)2], with transition-metal (M) cationic complexes of 1,10'-phenanthroline (phen) is reported: [M(phen)3][Ge(C2O4)3].xH2O [where M2+ = Cu2+ (1a and 1b), Fe2+ (2a and 2b), Ni2+ (3), Co2+ (4); x = 0.2 for 2b], [MGe(phen)2(mu2-OH)2(C2O4)2] [where M2+ = Cd2+ (5) and Cu2+ (6)]. The isolation of two polymorphs with Cu2+ (1a and 1b) and other pseudo-polymorphs for Fe2+ (2a and 2b) was rationalized based on slightly different molar ratios for the starting materials. All compounds have been characterized using EDS, SEM, vibrational spectroscopy (FT-IR and FT-Raman), thermogravimetry, and CHN elemental composition and their structure determined on the basis of single-crystal X-ray diffraction studies. The crystal packing of the different chemical moieties for each series of compounds was discussed on the basis of the various intermolecular interactions present (strong C-H...pi and weak C-H...O hydrogen-bonding interactions, C-H...pi and pi-pi contacts).

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Bis(oxalato)chromium(III) complexes: Versatile tectons in designing heterometallic coordination compounds

Marinescu¹,

Andruh²,

Lloret³

et al. 2011

Coordination Chemistry Reviews

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Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Cited by 19 publications

References 12 publications

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Heterodimetallic Germanium(IV) Complex Structures with Transition Metals

Bis(oxalato)chromium(III) complexes: Versatile tectons in designing heterometallic coordination compounds

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Two-dimensional oxalate-bridged heterometallic coordination polymer: Crystal structure and thermal behavior of [NaCr(pyim)(ox)2(H2O)]·2H2O (pyim=2-(2′-pyridyl)imidazole)

Cited by 19 publications

References 12 publications

Cyanido-Bridged {LnIIIWV} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {LnIIIWV} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Heterodimetallic Germanium(IV) Complex Structures with Transition Metals

Bis(oxalato)chromium(III) complexes: Versatile tectons in designing heterometallic coordination compounds

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Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study