Hui-Jie Lun

MnII, CuII and CoII coordination polymers showing antiferromagnetism, and the coexistence of spin frustration and long range magnetic ordering

Based on the ligand 1,2-H2bdc (1,2-H2bdc = 1,2-benzenedicarboxylic acid), three 2D coordination polymers [Mn(1,2-bdc)]n (1), [Cu(1,2-bdc)]n (2) and [Co3(OH)2(1,2-bdc)2]n (3), have been prepared and characterized. In comparison with the mononuclear Mn unit of compound 1, paddle-wheel binuclear Cu2(CO2)4 and trinuclear Co3(OH) building units are observed in 2 and 3, respectively. Also, the bdc2− ligands adopt different coordination modes in the three compounds. The resulting two frustrated lattices have been observed, such as the triangular lattice for 2 and the Kagome lattice for 3, and thus, both complexes 2 and 3 show spin frustrated antiferromagnetic properties. In addition, the magnetic hysteresis loops reveal the existence of the long range ordering in 2 and 3. Comparatively, the magnetic measurements indicate that compound 1 exhibits a weak antiferromagnetic interaction, and the fit of the variable-temperature magnetic susceptibility data to the empirical equation leads to the following parameters: J = −0.80(1) cm−1 and g = 2.02.

A chiral coordination polymer with double coaxially nested helical chains exhibiting spin-canting antiferromagnetism

A chiral coordination polymer, fabricated by the rare alternate arrangement of two types of double coaxially nested helical chains, which spiral towards the parallel and inverse directions, exhibits spin-canting antiferromagnetism.

Synthesis, structure, and property of a two-dimensional layer coordination polymer on Ag(I)

ABSTRACT By hydrothermal method, a new coordination polymer [Ag3(btc)(dmt)(H2O)]n (1) (H3btc = 1,3,5-benzenetricarboxylic acid, dmt = 2,4-diamino-6-methyl-1,3,5-triazine), has been synthesized and structurally characterized by IR spectrum, X-ray single diffraction, and elemental analysis. Compound 1 exhibits a planar 2D layer with 2-nodal (3,4)-connected {4.62}4{64.102} topology and further extends to 3D framework through hydrogen bond and Ag…O weak interactions. Moreover, compound 1 displays luminescent property at solid state and holds good catalytic activity toward photocatalytic degradation of RhB.

Hydrothermal Synthesis and Structural Characterization of a Three-Dimensional Coordination Polymer on Ag(I)

A new coordination polymer [Ag3(1,2,4-btc)]n (1) (1,2,4-H3btc = 1,2,4-benzenetricarboxylate) has been synthesized by hydrothermal method and characterized by X-ray single crystal diffraction, elemental analysis, IR spectrum, and TGA. Compound 1 exhibits a 3D network consisting of the 2D layer connected by the ligand 1,2,4-btc3−, which adopts a new coordination mode. Moreover, blue fluorescence at 480 nm emission was observed under 320 nm excitation.