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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

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Chemical Research in Chinese Universities 2007年第4期23卷 399-403页

作者： PAN Liang QIN Yong-chao HU Bin JIANG Zu-cheng College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 P. R. China

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.

关键词： Low temperature electrothermal vaporization ICP-OES dimethylglyoxime Chemical modifier Nickel and palladium

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

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Chinese Journal of Chemistry 2011年第10期29卷 2124-2128页

作者：吴香梅胡卫雅 Department of Chemistry College of Science Lishui University Lishui Zhejiang 323000 China

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 corr... 详细信息

关键词： copper N-arylation nitrogen heterocycles dimethylglyoxime water

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Study on the polarographic catalytic wave of the system cobalt(II)-dimethylglyoxime

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Chinese Journal of Chemistry 1987年第3期5卷 242-250页

作者： NI Ya-Ming LI Ling ZHOU Chun GAO Xiao-Xia*, Department of Chemistry, Peking University, Beijing Department of Chemistry Peking University Beijing

In the cobalt （Ⅱ）-dimethylglyoxime-NH3-NH4Cl （pH 9） system, me complex Co（Ⅱ）A2exhibits a sensitive polarographic wave. The mechanism of this catalytic wave has been investigatedby linear potential sweep voltammetry, cyclic voltammerty and anodic stripping voltammetry. Theexperimental evidences showed that a zero-valence "active cobalt" or its complex formed during theirreversible reduction of Co（Ⅱ）A2, which is adsorbed on the mercury electrode surface, and simul-taneously DMG is catalytically reduced by this "active cobalt". The mechanism of this system withthe conflicting explanations of a catalytic hydrogen wave or only adsorptive complex wave is dis-cussed.

关键词： DMG Study on the polarographic catalytic wave of the system cobalt dimethylglyoxime wave NH II

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

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Nano Research 2019年第10期12卷 2460-2467页

作者： Kang Wu Qi Li Rongbin Dang Xin Deng Minmin Chen Yu Lin Lee Xiaoling Xiao Zhongbo Hu College of Materials Science and Opto-electronic Technology Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Department of Materials Imperial College LondonRoyal School of MinesExhibition RoadLondon SW7 2AZUK

Nickel-rich cathode materials have attracted considerable interest because of their high specific capacities,voltage ranges,and low ***,serious capacity attenuation and poor rate performance limit their *** study proposes a novel strategy to improve the cycle stability of the nickel-rich ***0.1Mn0.1O2(NCM811)layer material by designing core-shell ***.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 *** capacity retention of CS-NCM811 was 72.8%,much higher than that of NCM811(47.1%)after 500 cycles at a rate of 5 *** 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.

关键词： lithium ion battery nickel-rich cathode materials core-shell structure dimethylglyoxime

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

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Chinese Journal of Structural Chemistry 2003年第3期22卷 255-259页

作者：陈丽娟林深杨明星刘世雄 Department of Chemistry Fujian Normal University Fuzhou 350007 China Central Laboratory Fuzhou University Fuzhou 350002 China

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.

关键词： cobalt complex dimethylglyoxime crystal structure

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