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Two new homometallic coordination polymers 1 and 2 have been prepared by the directly one-step hydrothermal reactions of a carboxylate-functionalized salen ligand with Zn(II) and Co(II) ions, respectively. 1 exhibits a 3D open framework built by [Zn 4 (μ 4 -O)(carboxylate) 8 ] units and double Zn-salen ligands, while 2 shows a 1D chain structure constructed by cobalt ions and the ligand derived from the hydrolysis to one C N bond of salen ligand. The preliminary fluorescence measurements of 1 – 2 show the influence of structure on the property. [ABSTRACT FROM AUTHOR]

Four novel Ln-bpdc coordination polymers [Ln(bpdc)(NO 3 )(DMA) 2 ] [Ln = La( 1 ), Pr( 2 ), Sm( 3 ), Eu( 4 )] [Ln = lanthanide, H 2 bpdc = 4,4-biphenyldicarboxylate acid and DMA = dimethylacetamide] have been solvothermally synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. 1 – 4 crystallize in the monoclinic space group P 2 1 / c and show a 2-D layer constructed from 1-D Ln–organic chain and tetradentate bpdc 2 − ligand. The magnetic behavior of 2 – 4 has been investigated. The solid-state photoluminescent measurement illustrates that Eu( 4 ) displays the strong fluorescent emissions, which demonstrate that π -rich aromatic organic bpdc 2 − ligands can efficiently transfer energy to the Eu III ions. In addition, thermogravimetric analysis of Pr( 2 ) is also described. [ABSTRACT FROM AUTHOR]

Abstract Two three-dimensional metal-organic frameworks {CdNa 2 (H 2 O) 2 (DMF)[(ML) 2 Na(H 2 O) 2 ]}·6H 2 O (L = C 22 H 18 N 2 O 6 ; M = Ni 1 , Cu 2) based on carboxylate-functionalized salen ligands were successfully synthesized by one-step synthesis of reacting 1,2-cyclohexanediamine- N , N ′-bis-(3-carboxylsalicylide) (H 4 L) with metal acetate. Both of them were characterized by single-crystal X-ray diffraction, powder X-ray diffraction (XPRD), elemental analysis, TG analysis, IR and UV–visible spectroscopy. X-ray Single-crystal structural analysis reveals that compounds 1 and 2 are isostructural, which display a 3D porous framework constructed by infinite [CdNa 2 (H 2 O) 2 (DMF)(COO) 4 ] n chains as nodes and [(ML) 2 Na(H 2 O) 2 ] (M = Ni 1 , Cu 2) units as linkers. They present the first examples of metal-salen-based MOFs constructed by heterometallic inorganic node. In addition, magnetic studies indicate that ferromagnetic interactions exist in compound 1. Graphical abstract Two metal-organic frameworks 1 and 2 based on carboxylate-functionalized salen ligands were successfully obtained by one-step synthesis. 1 and 2 are isostructural, which display a porous framework constructed by infinite [CdNa 2 (H 2 O) 2 (DMF)(COO) 4 ] n chains as nodes and [(ML) 2 Na(H 2 O) 2 ] (M = Ni 1 , Cu 2) units as linkers. Unlabelled Image Highlights • Compounds 1 and 2 present the first examples of metal-salen-based MOFs constructed by heterometallic inorganic node. • Compounds 1 and 2 were obtained by one-step synthesis without the preparation of “metalloligand” in advance. • Magnetic studies indicate that ferromagnetic interactions exist in compound 1. [ABSTRACT FROM AUTHOR]