Ting-Hai Yang

Tuning the field-induced magnetic transition in a layered cobalt phosphonate by reversible dehydration-hydration process.

A layered cobalt phosphonate, Co(2-pmp)(H(2)O)(2) (1) (2-pmpH(2) = 2-pyridylmethylphosphonic acid) is reported, which provides the first example of metamagnetic cobalt system that shows reversible changes in both structures and magnetic behaviors upon dehydration-hydration process.

Mixed Cu(II)–Bi(III) metal organic framework with a 2D inorganic subnetwork and its catalytic activity

The very dense (d = 4.359 g cm−3) three dimensional (3D) hybrid heterometallic framework Bi3O2Cu(OH)(pdc)2 (pdc3−:3,5-pyrazoledicarboxylate), 1, features a 2D inorganic subnetwork representing an unprecedented topological type, and is an effective catalyst for the diastereoselective synthesis of E-α,β-unsaturated ketones.

Two dimensional porous 3d–4f heterometallic coordination polymers constructed by pyridine-2,3-dicarboxylic acid

Reactions of pyridine-2,3-dicarboxylic acid (pydcH2), cobalt acetate and lanthanide nitrate under hydrothermal conditions result in four new 3d–4f heterometallic coordination polymers, namely, [LnCo(pydc)3(H2O)3]·9H2O {Ln = Dy (1), Ho (2), Er (3) and Tm (4)}. All compounds were characterized by elemental analysis, IR spectroscopy, SEM, EDS, thermal gravimetric analysis and X-ray diffraction. The compounds feature a two dimensional (2-D) layer structure with large apertures, in which each pydc2− ligand links two metal centers and each metal center is bonded to three pydc2− and vice versa. The adsorption and catalytic properties of compound 1 were investigated.

Metal Monophosphonates M{(2-C5H4NO)CH2PO3}(H2O)2 (M = Co, Ni, Mn, Cd): Synthesis, Structure, and Magnetism

Four isostructural metal monophosphonates, M{(2-C(5)H(4)NO)CH(2)PO(3)}(H(2)O)(2) with M = Co (1), Ni (2), Mn (3), and Cd (4), were synthesized and structurally characterized. These compounds show a double-chain structure in which the M(2)(μ-O)(2) dimers are connected by O-P-O bridges. The magnetic responses of 1-3 were investigated over a wide range of magnetic fields (up to 10 T) and temperatures (down to 50 mK). Except for 4, which is weakly diamagnetic from 2 K to room temperature, the dominant magnetic interactions are antiferromagnetic. Isothermal magnetic field sweeps at 50 mK provide signatures in the magnetic responses that are associated with antiferromagnetic to field-induced fully polarized (magnetically saturated) transitions. Analysis of the magnetic data indicates that 1 and 2 form magnetic dimer-like clusters with weak dimer-dimer interactions present. Contrastingly, the magnetic interactions present in 3 are significantly weaker, so a definitive description of the magnetism of this compound is elusive.

Crystal structure, topology, tiling and photoluminescence properties of 4d–4f hetero-metal organic frameworks based on 3,5-pyrazoledicaboxylate

Reaction of lanthanide oxides, cadmium acetate and 3,5-pyrazoledicarboxylic acid under hydrothermal conditions afforded five new isostructural 4d–4f hetero-metal organic frameworks, [Cd3Ln(pdc)3(H2O)] {H3pdc = 3,5-pyrazoledicarboxylic acid, Ln = La (1), Pr (2), Nd (3), Sm (4) and Eu (5)}. All compounds were characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The compounds feature a very interesting 3D structure built up from a secondary building unit, [Cd12Ln8(pdc)6], and possess a new topology type and complicated unique tiling. The solid state photoluminescence properties of compounds 3–5 were investigated at room temperature.

CCDC 1412438: Experimental Crystal Structure Determination

Related Article: Ting-Hai Yang, Ana Rosa Silva, Lianshe Fu, Fa-Nian Shi|2017|Z.Anorg.Allg.Chem.|643||doi:10.1002/zaac.201700344

CCDC 733938: Experimental Crystal Structure Determination

Related Article: Ting-Hai Yang, Deng-Ke Cao, Yi-Zhi Li, Li-Min Zheng|2010|J.Solid State Chem.|183|1159|doi:10.1016/j.jssc.2010.03.008