European Journal of Inorganic Chemistry

A new oxide, Bi₂La_0.5Sr_0.5Nb_1.75Sc_0.25O₉ (I), crystallizes in the polar A2₁am space group at room temperature. The relaxor behavior of I was characterized by using dielectric, piezoelectric, and ferroelectric measurements. The relaxation parameter (γ), piezoelectric coefficient (d₃₃), and remanent polarization (P_r) for I are 1.91, 3 pC/N, and 5.7 μC/cm², respectively.

New Zn^II complexes have been prepared and structurally characterized, including a rare example of a dimetallic Zn species containing cis-alkyl groups. Their reactivities in both solution and bulk polymerizations of rac-lactide and ϵ-caprolactone are presented, including in reactions conducted under microwave conditions. Interestingly, the behaviours of these complexes are different to their morpholinyl analogues.

Blue-emitting fac-[Ir(mppy)₃] [mppy = 2-(4′-methoxyphenyl)pyridine] derivatives have been prepared by regioselective substitution reactions and subsequent conversions. The introduction of electron-withdrawing groups such as CHO, CN, andsulfonyl groups (SO₂Me, SO₂Ar) at the 5′-position of the mppy portion induces a considerable blueshift of luminescence emission in organic solvents.

The comparative study of otoconia-shaped calcite–gelatine composites and human otoconia based on in vitro experiments, electron microscopy and X-ray investigations reveals a detailed picture of the 3D structure and morphogenesis of the materials. Their peculiar inner architecture is characterised by a dumbbell-shaped mass/density distribution.

A microporous zinc imidazolate compound that contains photoswitchable organic linker molecules is reported. The synthesis can be carried out by conventional or microwave-assisted heating as well as using ultrasound. The trans–cis isomerization of the azophenyl groups can be achieved by irradiation with UV light. UV/Vis spectroscopy demonstrates the partial reversibility of the switching process.

Monodisperse single-crystalline Fe₃O₄ nanorice has been synthesized by a one-pot, surfactant-assisted hydrothermalmethod.

A series of blue-light emitting Ni^II Schiff-base complexes has been synthesized. The ligands lack mesomorphic properties, however, mesomorphism was induced upon complexation. Small-angle X-ray scattering (SAXS) revealed rectangular mesophase structures with c2mm symmetry.

Six rare-earth-metal-constructed 3Dmetal–organic frameworks have been synthesized. The structural analyses indicate that 1–6 are basically isostructural and show a rare host 3D framework that contains Keggin polyoxoanions [SiW₁₂O₄₀]^4– as templates. The photoluminescence measurements reveal that 6 shows obvious red luminescence.

Treatment of fac-[M(CO)₃(H₂O)₃]⁺ (M = Re, ^99mTc) with a new S,N,O-donor ligand derived from cysteamine, 2-[2-(ethylthio)ethylamino]acetic acid (L¹H), leads to the formation of fac-[M(κ³-L¹)(CO)₃] [M = Re (1), ^99mTc (1a)]. Ligand L¹H has been functionalized with a N,N-diethylamine group with ethylenic and propylenic linkers resulting in chelators L²H and L³H, respectively. These ligands coordinate to a fac-[M(CO)₃]⁺ core to afford complexes of type fac-[M(κ³-L)(CO)₃].

The attachment of three negatively charged trihydridoborate or trimethylborate substituents to a benzene ring leads to the formation of Li⁺–π complexes even in the presence of competing THF or 12-crown-4 ligands.

Visible-light irradiation of [(η-C₄H₄BOMe)Co(η-C₆H₆)]⁺ causes the replacement of benzene by other ligands to give sandwich and half-sandwich complexes that contain the [(η-C₄H₄BOMe)Co]⁺ fragment.

The reaction of Me₃Tl with a series of thio- and selenophenols afforded the compounds [(Me₂TlER′)]n {where E = S, Se; R′ = C₆H₅, [2,(4),6-Me₃C₆H₂], (2,4,6-tBu₃C₆H₂)}. X-ray structural analysis showed dimeric or polymeric structures by means of the intermolecular Tl···E bonding interactions.

The synthesis of metallocenylphosphanes of the type PR₂Mc and Se=PR₂Mc and their palladium complexes [PdCl₂(PR₂Mc)₂] is discussed. Their electrochemical properties and catalytic behavior in C–C cross-coupling reactions is investigated. The results of the catalytic reactions can be correlated with the electronic properties of the free phosphanes (J).