Synthesis and crystal structure determination of the title complex are presented. It shows that the zinc atom located in the distorted tetrahedral coordination, is composed of two nitrogen atoms and two sulfur atoms from the two ligand.

A notable hysteretic effect has been observed in the interaction of Co(Ⅱ) with human serum albumin (HSA) or bovine serum albumin (BSA) using UV-Visible spectrometry at physiological pH (7.43), which shows that the binding between Co(Ⅱ) and HSA or BSA may induce a slow transition of HSA or BSA from the conformation of weaker affinity for Co(Ⅱ) to one of stronger affinity (A-B transition). The rate constants and activation parameters of this transition were measured and are discussed. It is inferred that such a conformation transition may occur due to the binding of the first Co(Ⅱ) ion with the peptide segment of N-terminal residues 1-3, which results in a 'hinged movement' of the relatively hydrophobic 'valley' in the IA subdomain. This process leads to a slow conformational transition in the albumins, makes the other binding sites of Co(Ⅱ) exposed, and shows a positive cooperativity effect. The LMCT (ligand-to-metal charge transition) bands of the Co(Ⅱ)-HSA and Co(Ⅱ)-BSA systems also show a kind of hypochromic effect featuring a dipole-dipole interaction mechanism. This phenomenon is rarely reported.

The aminosilane-modified magnetite nanoparticles were synthesized by the coprecipitation and surface modification with 3-aminopropyltriethoxysilane (APTTS). The superparamagnetic APTTS/Fe3O4 nanospheres with an average diameter of 10nm were characterized significantly with functional group, well dispersion and stabilization in aqueous fluids, as well as a maximized saturation magnetization of 63.54emu/g.

The reaction of picolinic acid (Hpic) and (n-Bu4N)4[MosO26] in the presence of CH3CN gave a supramolecular compound (n-Bu4N)2[Mo2O6(pic)2] (1), and its structure was characterized by elemental analysis, IR spectra and single crystal Xray diffraction analysis. The single crystal X-ray diffraction study shows that the crystal is in monocnnic crystal system, P21/c space group with cell parameters a=0.9941 (2), b=1.3719(2), c=1.8824(2)nm, β=100.840(10)°, Mr=508.50, V=2.5214(9)nm3, F(000)=1072. Compound 1 is a dimer through two μ2-O bridging to two MoO3 (pic)-unit, then connected one-dlmensional anion-chain by undassical hy-drogen bonding, and the anion-chain across the channels formed via (n-Bu4N)+ cations. By means of undassical hydrogen bonding, the anion-chain and cationchannels assemble into three-dimensional supramolecular networks.

The hydrothermal reaction of norfloxacin (H-Norf) with NH4VO3 yields an unprecedented neutral nanosized molecular square grid containing a direct coordinate bond between quinololine drug and V(Ⅱ), V(Norf)2·2H2O 1, which is characterized by single Xray determination and IR spectrum as well as TGA.