非线性光学材料──水草酸铵

一水草酸铵（简称ＡＯＭ）是一种优良的电光晶体￣［１］。文献￣［１，２］报道了该晶体的晶体结构，化学式为（ＮＨ＿４）＿２Ｃ＿２Ｏ＿２·Ｈ＿２Ｏ，属正交晶系，Ｐ２２２空间群，晶胞参数ａ＝０．８０３５ｎｍ，ｂ＝１。０３１ｎｍ，ｃ＝０．３８０１ｎｍ，ｚ＝２。本文拟报道ＡＯＭ单晶生长，热化学分析，透过波段以及非线性光学性质的初步研究。     

Diorganotin(IV) Complexes with Monohydrate Disodium Salt of Iminodiacetic Acid: Synthesis,Characterization, Crystal Structure and Biological Activities

Diorganotin(IV) derivatives have been synthesized by the reaction of R₂SnL₂ (R=n‐Bu 1 , Ph 2 ) with monohydrate disodium salt of iminodiacetic acid ( Na₂L ) in 1 : 1 M/L ratio under reflux conditions. The compounds have been characterized by FT‐IR, NMR (¹H and ¹³C) spectoscopy, electron ionization mass spectrometry (EIMS), thermogravimetric analyses (TGA) and single crystal XRD. FTIR data indicates a mono‐dentate binding mode of the carboxylic acid group as well as participation of the amino nitrogen and aqua oxygen in coordination with organotin(IV) moieties. NMR data demonstrates a tetra‐coordinated environment around tin(IV) in solution. Mass spectrometric and thermogravimetric analyses verify the close similarities between the molecular structures of both complexes. The thermal stability of diphenyltin(IV) derivative ( 2 ) was found slightly higher than that of the free ligand ( Na₂L ). Single crystal X‐ray analysis of the complex 1 have shown a hexa‐coordinated geometry around Sn(IV) with trans configuration. There are evidences for the existence of intermolecular hydrogen bonding in the structure of the complexes. The products displayed significant antibacterial and antifungal activities in contrast to the biologically inactive ligand precursor. However, the hemolytic cytoxicity of the complexes was comparatively high than the free ligand.     

Structure of Perchlorato(2,5,8,11-Tetraazadodecane)Copper (II) Perchlorate Monohydrate

[Cu(C₈H₂₂N₄)]·(ClO₄)₂.H₂O, M_r= 454.80, orthorhombic C222₁, a = 15.481(5), b = 7.404(1), c = 14.827(3)Å, V = 1699.5(8)ų, Z = 4, D_x = 1.78 g/cm³, λ(MoKα) = 0.71073Å, μ = 16.5 cm^?1. F(000) = 940, T = 22°C, R = 6.86%, R_w = 7.66% for 820 observed reflections (I > 2.5σ (I)). The coordination number for the copper(II) ion is five, and the coordination geometry about copper(II) ion is a buckled square pyramid with the tetraamine equatorial and a perchlorate ion axial. The tetraamine is coordinated in a square-plannar manner with slight tetrahedral distortions. The four Cu-N distances span a very narrow range, 1.990(10) ?1.994(14)Å.     

火焰原子吸收法同时测定一水柠檬酸中微量铅,铁和钙

本文研究了一水柠檬中微量铅，锌和钙的测定方法，并与标准加入法和湿法灰化法测得的结果进行了比较，获得了较为满意的结果，其回收率为９５．８％－１１０．３％，测量的相对标准偏差小于１０．２％。     

Hydrate der Fluorsulfonsäure: Das Schmelzdiagramm des Systems FSO3H?H2O und die Kristallstruktur des Monohydrats, (H3O)FSO3

Hydrates of Fluorosulfuric Acid: The Melting Diagram of the System FSO₃H? H₂O and the Crystal Structure of the Monohydrate, (H₃O)FSO₃ The system FSO₃H? H₂O has been investigated by difference thermal analysis. By adhering to exclusively lower temperatures in the course of preparation and manipulation of the measuring samples, it was possible to avoid hydrolysis of the S? F bond and to obtain a quasi-binary melting diagram. This reveals the existence of four crystalline hydrates FSO₃H · nH₂O with n = 1, 2, 3, and 4, melting at –12, –53 (dec.), –46, and ?63°C (dec.), respectively. The structure of the monohydrate has been determined (crystal system orthorhombic, space group Pnma, Z = 4 formula units per unit cell; lattice constants a = 8.055, b = 6.465, c = 7.459 Å at ?50°C; final R value with 515 independent observed MoKα diffractometer data at 0.043). The result is a typical oxonium salt, (H₃O)FSO₃, characterized by strong hydrogen bonds only of the kind O? H…?O and with interesting relations to the isosteric, dimorphic compound (H₃O)ClO₄.     

一水柠檬酸单晶的激光拉曼光谱

本文报道了一水柠檬酸在不同几何配置下的拉曼光谱。从一些谱峰的位移,各向异性及退偏振可以判断,晶体分子中存在较强的氢键。由CC,CO,CO谱线的频移等实验结果可以判断,由于氢键的影响,分子间的耦合及众多COO     

新亚铜灵试剂光度法测定烟草中的铜

研究了在 Emulsifier- OP存在下新亚铜灵试剂 (NHCM)与铜的显色反应 ,在 p H为 4.5的 HAc- Na Ac缓冲介质中 ,Emulsifier- OP存在下 ,NHCM与铜反应生成 2∶ 1稳定络合物 ,λmax=46 0 nm,ε=1 .6 4× 1 0 4 L·mol- 1 ·cm- 1 。铜含量在 0— 5 0 μg/2 5 m L 范围内符合比耳定律 ,该方法用于烟草中铜含量的测定 ,结果令人满意。     

FORMULATION OF MODEL CUTTING-OIL WATER EMULSIONS USING PARAFFINIC OIL AND IONIC/NONIONIC SURFACTANT MIXTURE.

Cutting-oil emulsions are marketed under the shape of concentrates that the user has to dilute. More often these concentrates are monophasic microemulsions. We show that this kind of microemulsions may be obtained while relying on the generalized concept of Winsor, which guides the manipulation of three formulation parameters, which in turn rationally modify the surfactant interactions with the oily and the aqueous phases.

The model concentrates that we have formulated contain six constituents. The oily phase is constituted of paraffinic oil and normal decanol. The aqueous phase is a solution of monoethanolamine borate in water whose hardness is fixed at 40°f. The active mixture contains a hydrophilic surfactant and a lipophilic surfactant.

We have formulated concentrates presenting an excellent ability to dilution, a very good stability to the hardness of water and pHs in agreement with the cutting fluid specification sheets, while identifying the formulation parameters to the mass ratio of normal decanol in the oily phase, to the mass ratio of monoethanolainine borate in the aqueous phase and to the mass ratio of the hydrophilic surfactant in the active mixture.