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A novel manganese(II) coordination polymer [Mn(bpy)2(μ2-S6)]n 1 (bpy = 2,2′-bipyridine) has been synthesized by low-temperature solid-state reaction. Single crystal X-ray analyses reveal that compound 1 possesses a new type of two-dimensional (2-D) framework structure. Each Mn(II) ion, located on an inversion center of distorted octahedron, is six-coordinated by four nitrogen atoms from the bpy ligands and two sulfur atoms from the μ2-S6 ligands. The compound 1 was characterized by elemental analyses, IR spectra and UV–visible spectra. The third-order non-linear optical (NLO) properties were also investigated and they exhibit nice non-linear absorption and self-defocussing performance with modulus of the hyperpolarizability (γ) 6.56 × 10−30 esu for 1 in a 2.5 × 10−4 mol dm−3 DMF solution.

A cobalt(II) thiocyanate complex [Co(py)4(NCS)2] 1 (py = pyridine) has been synthesized by low-temperature solid-state reaction. Single crystal X-ray analysis reveals that 1 possesses a one-dimensional (1-D) zigzag chain structure. Each Co ion is symmetrically coordinated by four pyridine ligands and also coordinates with two NCS− anions. Compound 1 was characterized by elemental analyses, IR spectra and UV-visible spectra. The third-order non-linear optical (NLO) properties were also investigated and they exhibit non-linear absorption and self-defocusing performance with modulus of the hyperpolarizability 9.46 × 10−30 esu for 1 in a 3.6 × 10−4 mol dm−3 DMF solution.

Objective To study the extraction system of hirudin emulsion liquid membrane with the Poecilobdella manillensis as raw material, di-(2-ethylhexyl) phosphate (D2EHPA) as carrier, Span 80 as emulsifier, octane and D2EHPA mixed to constitute membrane solution, diluted HCl solutions as internal aqueous phase. Method Using the orthogonal experiment to optimize the extraction conditions of hirudin reference substance such as membrane phase, internal aqueous phase volume ratio (MIPVR), external aqueous phase pH, internal aqueous phase pH, mobile carrier concentration and so on, and then using hirudin crude extracts to do purifying experiment, and gaining experimental samples. Result The optimal conditions of hirudin extraction were as follows: MIPVR 10: 3, internal aqueous phase pH 2.6, external aqueous phase pH 3.4, the mass fraction of carrier D2EHPA 2%. In the optimal extraction conditions, when the initial concentration of hirudin was one anti-thrombin activity units (ATU) x mL(-1), ATU recovery rate of the reference substance was 83.06%. In the purifying experiment of crude extracts, ATU recovery rate was 82.99%, and the specific activity of sample was 3 289.48 the ATU x mg(-1). Discontinuous polyacrylamide gel electrophoresis and spectral scanning, the results showed that the purity and reference substance were considerable. Conclusion The method of preparation hirudin was relatively simple, the purity of the experimental samples and ATU recovery were both high.