Bis[3-(hydroxyamino)-3-methyl-2-butanone oximato(2-)-N,N']nickel. Structure and properties of a [Ni(DMG)2]0-related complex

Schlemper, E. O.; Murmann, R. Kent

doi:10.1021/ic00149a014

Cited by 21 publications

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“…13 A higher molar extinction coefficient for the complex was hypothesized as the reason for a 50% improvement in detection limit for FeĲII)-Bphen (2.2 × 10 4 M cm −1 ) compared to NiĲDMG)H 2 (3 × 10 3 M cm −1 ) and Cu-dithiooxamide (750 M cm −1 ). [46][47][48] The observed solubility of the NiĲDMG)H 2 complex was higher than the Cu-dithiooxamide product, which was suspected as the reason why detection sensitivity of Ni was not higher than Cu.…”

Section: Detection Of Fe Ni and Cu In Single Channelsmentioning

confidence: 99%

Multiplexed paper analytical device for quantification of metals using distance-based detection

et al. 2015

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Exposure to metal-containing aerosols has been linked with adverse health outcomes for almost every organ in the human body. Commercially available techniques for quantifying particulate metals are time-intensive, laborious, and expensive; often sample analysis exceeds $100. We report a simple technique, based upon a distance-based detection motif, for quantifying metal concentrations of Ni, Cu, and Fe in airborne particulate matter using microfluidic paper-based analytical devices. Paper substrates are used to create sensors that are self-contained, self-timing, and require only a drop of sample for operation. Unlike other colorimetric approaches in paper microfluidics that rely on optical instrumentation for analysis, with distance-based detection, analyte is quantified visually based on the distance of a colorimetric reaction, similar to reading temperature on a thermometer. To demonstrate the effectiveness of this approach, Ni, Cu, and Fe were measured individually in single-channel devices; detection limits as low as 0.1, 0.1, and 0.05 µg were reported for Ni, Cu, and Fe. Multiplexed analysis of all three metals was achieved with detection limits of 1, 5, and 1 µg for Ni, Cu, and Fe. We also extended the dynamic range for multi-analyte detection by printing concentration gradients of colorimetric reagents using an off the shelf inkjet printer. Analyte selectivity was demonstrated for common interferences. To demonstrate utility of the method, Ni, Cu, and Fe were measured from samples of certified welding fume; levels measured with paper sensors matched known values determined gravimetrically.

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Section: Detection Of Fe Ni and Cu In Single Channelsmentioning

confidence: 99%

Multiplexed paper analytical device for quantification of metals using distance-based detection

et al. 2015

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“…Ni(L 59 ) 2 crystals (R = CH 3 ) were obtained unexpectedly, as a result of the destruction of the nickel(II) complex with tridentate polynitrogen aminooxime. 250 The reactivity of the compound correlated with the donor properties of solvent molecules. The higher the donor properties, the faster the destruction of Ni(L 59 ) 2 .…”

Section: Increased Reactivitymentioning

confidence: 99%

Metal–Nitroxide Complexes: Synthesis and Magnetostructural Correlations

Овчаренко¹

2010

Stable Radicals

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IntroductionInteractions between the paramagnetic ions of transition metals and stable radicals are convenient and effective methods for the synthesis of multispin molecules. These metal-nitroxide systems are often called heterospin systems because they contain paramagnetic centers with both d (or f) odd electrons and centers with p electrons. Paramagnetic centers can differ in the electron spin, g factor, the character of electron spin density delocalization, and heat capacity. The presence of several paramagnetic centers in heterospin molecules has stirred growing interest in their magnetic properties because these compounds are convenient objects for studying the subtle peculiarities of exchange interactions and revealing valuable magnetostructural correlations. That is why coordination chemistry of transition metals with stable nitroxides is an actively developing direction in modern chemistry that contributes to problem solving in the field of molecular magnetism. The results of studies on the synthesis and properties of metal complexes with nitroxides have been considered from different viewpoints and at different times in many monographs and reviews. 1 -19 Importantly, this approach offers the potential for control over the structure of the designed heterospin molecule and the character of interactions between the odd electrons of paramagnetic centers, which is necessary for constructing justifiable magnetostructural correlations. This is one of the factors responsible for the continuous growth of the number of new metal-nitroxide complexes. The Cambridge Structural Database alone contains more than one thousand structurally defined metal-nitroxide systems. 20 Therefore, currently it is impossible and not necessary to collect all available literature data on the synthesis and properties of metal-nitroxide systems in one publication. In any account, a comprehensive review of this kind will already have become incomplete by the time of its publication because new heterospin compounds based on transition metal compounds with nitroxides are being added daily to the list. However, the Stable Radicals: Fundamentals and Applied Aspects of Odd-Electron CompoundsEdited by Robin G. Hicks

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“…To the best of our knowledge, RNC crystal structures ( 7 )–( 8 ) are only the third example of stacked Ni(II) complexes that form infinite parallel metal ion columns without bridging atoms between metal centres. The first two are the structures based on vic -dioximes [ 20 ], predominantly dimethyl [ 21 , 22 , 23 , 24 , 25 ] and diphenyl [ 26 , 27 , 28 ] glyoximes, and the 3-(hydroxyamino)-3-methyl-2-butanone oximato 2− ligand [ 29 ]. All such structures are characterised by parallel Ni ion columns with a single metal–metal distance in the range 3.183 Å to 3.254 Å for Ni( dmg ) 2 (dimethylglyoxime), according to different authors, and six nearest-neighbour columns around the central stack.…”

Section: Discussionmentioning

confidence: 99%

“…The Ni( dpg ) 2 (diphenylglyoxime) structure is also characterised by the single Ni–Ni distance of 3.547 Å, but with only four nearest neighbour columns. The channels in the latter can accommodate columns of Br or I atoms, leading to the charge transfer inclusion type complexes, where the Ni–Ni distance is lowered to 3.271(1) Å at ambient temperature [ 27 ], or to 3.223(2) Å at −160 °C [ 29 ]. A recent review of Ni complexes that form 1D stacks in which metal centres are directly aligned because of metallophilic interactions is provided in [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

“…Obviously, one cannot expect preservation of the stacked metal columns of any length in solvent media. Secondly, the reported

complex of the doubly deprotonated α -hydroxylamine oxime ligand is deep purple in colour (λ max = 541 nm), while the Ni–Ni distance in the stack is 6.400 Å [ 29 ]; consequently, such interactions cannot contribute to the visible spectrum. Thirdly, we carried out our quantum chemical modelling on a single complex molecule, without accounting for any Ni–Ni interactions (modelling a cluster of stacked molecules is much more challenging), and obtained a simulated spectrum that is in reasonable agreement with the experimental one.…”

Section: Discussionmentioning

confidence: 99%

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Old Acquaintances and Novel Complex Structures for the Ni(II) and Cu(II) Complexes of bis-Chelate Oxime–Amide Ligands

Bazzicalupi,

Grimmer,

Nikolayenko

2024

Molecules

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In the process of systematically studying the methylhydroxyiminoethaneamide bis-chelate ligands with polymethylene spacers of different lengths, L1–L3, and their transition metal complexes, a number of new Ni(II) and Cu(II) species have been isolated, and their molecular and crystal structures were determined using single-crystal X-ray diffraction. In all of these compounds, the divalent metal is coordinated by the ligand donor atoms in a square-planar arrangement. In addition, a serendipitously discovered new type of neutral Ni(II) complex, where the propane spacer of ligand L2 underwent oxidation to the propene spacer, and one of the amide groups was oxidised to the ketoimine, is also reported. The resulting ligand L2′ affords the formation of neutral planar Ni(II) complexes, which are assembled in the solid state on top of each other, and yield two polymorphic structures. In both structures, the resulting infinite, exclusively parallel metal ion columns in ligand insulation may serve as precursor materials for sub-nano-conducting connectors. Overall, this paper reports the synthesis and characterisation of seven new anionic, cationic, and neutral Ni(II) and Cu(II) complexes, their crystal structures, as well as experimental and computed UV–Vis absorption spectra for two structurally similar Ni(II) complexes, yellow and red.

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Bis[3-(hydroxyamino)-3-methyl-2-butanone oximato(2-)-N,N']nickel. Structure and properties of a [Ni(DMG)2]0-related complex

Cited by 21 publications

References 0 publications

Multiplexed paper analytical device for quantification of metals using distance-based detection

Multiplexed paper analytical device for quantification of metals using distance-based detection

Metal–Nitroxide Complexes: Synthesis and Magnetostructural Correlations

Old Acquaintances and Novel Complex Structures for the Ni(II) and Cu(II) Complexes of bis-Chelate Oxime–Amide Ligands

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