In this paper, molecularly imprinted polymers with high selectivity for nonylphenol (NP) were synthesized by sol-gel process using 4-vinylpyridine (4-Vpy) as functional monomer, ethyleneglycol dimethacrylate as crosslinker (EGDMA), azobisisobutyronitrile (AIBN) as initiator, NP as template molecules. The performance of imprinted material was evaluated by adsorption kinetic, adsorption isotherm and adsorption selectivity. The results indicated that this material had not only binding properties but also high selectivity to the template molecule, which had good application prospects in the selective enrichment and separation of NP for pretreatment and analysis of complex environmental samples.

2013) Ligand-directed assembly of distinct 1-D Cd II coordination polymers with a bent dipyridyl derivative and two isophthalates bearing different 5= 4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole, H 2 hip = 5-hydroxyisophthalic acid, H 3 sip = 5-sulfoisophthalic acid), have been hydrothermally synthesized and structurally characterized. Complex 1 has a comb-like 1-D coordination chain, while 2 presents a 1-D dualtrack motif. The structural modulation of the coordination polymers can be achieved by simply changing the 5-substituent of the isophthalate from a hydroxyl group to a sulfonate group. Further, supramolecular architectures with higher dimensionality are constructed via hydrogen bonding and/ or aromatic π-stacking interactions. Both complexes have been characterized by IR, microanalysis, and powder X-ray diffraction techniques. In addition, the solid fluorescence properties of both complexes have also been investigated.

Three 1D/2D HgII coordination polymers (CPs), namely {[Hg3(L)2Cl6](H2O)}n (1), [Hg(L)Br2]n (2), and [Hg(L)I2]n (3) were prepared by assembly of 3,4‐bis(3‐pyridyl)‐5‐(4‐pyridyl)‐1,2,4‐triazole (L) with different inorganic HgII salts (i.e. HgCl2, HgBr2 or HgI2). Single‐crystal X‐ray diffraction analysis reveals two types of bimetallic subunits [(Hg)2C6N4] and [(Hg)2C12N6] in CP 1, which are further extended to a 2D coordination network. Both of CPs 2 and 3 show 1D zigzag arrays bridged by L ligands. Notably, the L ligands take the (η4, μ4) coordination fashion in 1 but (η2, μ2) binding mode in 2 and 3. The structural differences of CPs 1–3 indicate that the L ligand can adjust its coordination fashions to meet the requirements of HgII centers, relying on the presence of distinct halide anions. In addition, 1 can be applied to fabricate an electrochemical biosensor for the detection of penicillin.

The zinc(II) pseudohalide complexes {[Zn(L 334 ) (SCN) 2 (H 2 O)](H 2 O) 2 } n (1) and [Zn(L 334 )(dca) 2 ] n (2) were synthesized and characterized using the ligand 3,4-bis(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (L 334 ) and ZnCl 2 in presence of thiocyanate (SCN -) and dicynamide [dca, N(CN) 2 -] respectively. Single-crystal Xray structural analysis revealed that the central Zn II atoms in both complexes have similar octahedral arrangement. Compound 1 has a 2D sheet structure bridged by bidentate L 334 and double μ N,S -thiocyanate

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