Determination of Nickel and Palladium in Environmental Samples by Low Temperature ETV-ICP-OES Coupled with Liquid-liquid Extraction with Dimethylglyoxime as Both Extractant and Chemical Modifier

A novel method for the determination of nickel and palladium in environmental samples by low temperature ETV-ICP-OES with dimethylglyoxime（DMG） as both the extractant and chemical modifier has been developed. In this study, it was found that nickel and palladium can form complexes with dimethylglyoxime（0. 05%, mass fraction） at pH 6.0 and can be extracted into chloroform quantitatively. The complexes can be evaporated into plasma at a suita-ble temperature（ 1400℃） for ICP-OES detection. Under the optimized conditions, the detection limits of nickel and palladium are 0.48 and 0. 40 ng/mL, respectively, while the RSD values are separately 5.0% and 3.1% （p = 50 ng/mL, n = 7）. The proposed method was applied to the determination of the target analytes in environmental sam-ples with satisfactory results.

Copper-catalyzed N-Arylation of Imidazoles with Aryl or Heteroaryl Halides Facilitated by Dimethylglyoxime in Water

A combination of CuSO4/dimethylglyoxime was found to be an efficient and inexpensive catalyst system for N-arylation of imidazole and benzimidazole with aryl halides and heteroaryl halides in water, providing the corresponding products in moderate to good yields.

Synthesis and Crystal Structure of Bis(p-aminotoluene)-bis(dimethylglyoximato) Cobalt(Ⅲ) Perchlorate

The title compound (C22H32.5ClCoN6O8.25, Mr = 607.42) crystallizes in the orthor- hombic system, space group C2221 with a = 11.320(2), b = 20.933(4), c = 23.936(5) ? V = 5672(2) 3, Dc = 1.423 g/cm3, Z = 8, m(MoKa) = 0.754 mm-1, F(000) = 2532, R = 0.0512 and wR = 0.1190. There are eight complex molecules [Co(C4H6N2O2)(C4H8N2O2)(C7H9N)2]ClO40.25H2O of C2 crystallographic symmetry in a unit cell, including two crystallographically independent molecules, in which different orientations of the MePhNH2 groups are found. Two MePhNH2 groups are in trans position for molecule A, and cis for B. The central metal atom is in a distorted octahedral environment. The hydrogen bonds of OH(oxime)…O and NH(p-aminotoluene group)…O construct an one-dimensional chain along the c axis in the title compound.

Syntheses,Structures and Vitro Anticancer Activities ofμ_2-O-andμ_2-Dimethylglyoximato-bridgedμ_3-O-Tris[di(m-fluorobenzyl)tin]Bis(dimethylglyoximate)

μ_2-O-and μ_2-dimethylglyoximato-bridged μ_3-O-tris[di（m-fluorobenzyl）tin] bis（dimethylglyoximate）（1） has been synthesized by the reaction of di（m-fluorobenzyl）tin dichloride with dimethylglyoxime. Complex 1 was characterized by means of IR,~1H NMR,elemental analysis and X-ray diffraction. It crystallizes in orthorhombic system,space group Pna21 with a = 2.22172（12）,b = 1.05566（6）,c = 2.15577（12） nm,V = 5.0561（5） nm^3,Z = 4,C_（50）H_（50）F_6N_4O_6Sn_3,Mr = 1273.01,Dc = 1. 6721 g/cm3,μ_（MoΚα） = 15.44 cm^（-1）,F（000） = 2520,R = 0.0281 and wR = 0.0683. The stabilities,orbital energies and composition characteristics of some frontier molecular orbitals of 1 have been investigated with the quantum chemistry calculation. The properties of thermogravimetric and vitro anticancer activities of the compound have been discussed.

A novel synthesis strategy to improve cycle stability of LiNio.8Mno.1Co0.1O2 at high cut-off voltages through core-shell structuring

Nickel-rich cathode materials have attracted considerable interest because of their high specific capacities,voltage ranges,and low cost.However,serious capacity attenuation and poor rate performance limit their application.This study proposes a novel strategy to improve the cycle stability of the nickel-rich LiNi0.sCo0.1Mn0.1O2(NCM811)layer material by designing core-shell LiNio.sCoo.1 Mno.102(CS-NCM811).CS-NCM811 is designed by the characteristic reaction between dimethylglyoxime(C4H8N2O2)and nickel ion to form Ni(C4H7N2O2)2-The CS-NCM811 is characterized with high nickel content in its core and high manganese content on its surface,leading to a high capacity and excellent cycle stability.The capacity retention of CS-NCM811 was 72.8%,much higher than that of NCM811(47.1%)after 500 cycles at a rate of 5 C.Not only is this method a no vel strategy to desig n high capacity cathode materials but also provides some new in sights into the cycle stability of nickel-rich layered cathode materials.