cobalt(II) dodecyl sulfate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 有机硫酸及其衍生物
• 英文名称: cobalt(II) dodecyl sulfate
• 英文别名: cobalt(II) dodecylsulfate；cobalt dodecyl sulfate
• 化学式: 2C₁₂H₂₅O₄S*Co
• 分子量: 589.781
• InChiKey: YYAWVUNPXBSLEX-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  3.38
• 重原子数：
  18.0
• 可旋转键数：
  12.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  66.43
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  cobalt(II) dodecyl sulfate 、 ferrous dodecyl sulfate 以 甲胺 为溶剂， 生成 cobalt ferrite
  参考文献：
  名称：

  Control of the Size of Cobalt Ferrite Magnetic Fluid

  摘要：

  Cobalt and iron(II) dodecyl sulfate, Co(DS)(2) and Fe(DS)(2), are used to make nanosize magnetic particles. The size of the particles is controlled by the surfactant concentration. The average size of the particles, determined by transmission electron microscopy and from simulation of Langevin curves, varies from 2 to 5 nm, with 30-35% polydispersity in the size distribution. The magnetic studies are performed on particles having 2, 3, and 5 nm diameter, respectively. These particles are characterized by a superparamagnetic behavior. The saturation magnetization decreases with the particle size and is explained in terms of an increase in the noncollinear structure at the interface. For 5 nm particles, a cubic magnetocrystalline anisotropy is observed. On decreasing the size of the particles, the surface anisotropy strongly increases.

  DOI：

  10.1021/jp9524136
• 作为产物：
  描述：

  cobalt(II) nitrate hexahydrate 、 sodium dodecyl-sulfate 以 水 为溶剂， 以20%的产率得到cobalt(II) dodecyl sulfate
  参考文献：
  名称：

  An eco-friendly procedure for the synthesis of polysubstituted quinolines under aqueous media

  摘要：

  Some new metal dodecyl sulfates were prepared by the reaction of sodium dodecyl sulfate and the corresponding metal nitrates. All of the prepared salts catalyzed the synthesis of quinoline from o-aminoaryl ketones and ketones or beta-diketones. Among the metal dodecyl sulfates, zirconium tetrakisdodecyl sulfate, was superior to others. Polysubstituted quinolines were synthesized from the same starting materials in the presence of a catalytic amount of Zr(DS)(4) in good to high yields in water under reflux conditions. Zr(DS)(4) could be recovered and reused. (c) 2006 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.molcata.2006.06.031

文献信息

• Nonstoichiometric Zinc Ferrite Nanocrystals:  Syntheses and Unusual Magnetic Properties
  作者：J. F. Hochepied、P. Bonville、M. P. Pileni

  DOI：10.1021/jp991626i

  日期：2000.2.1

  This paper demonstrates that, by using oil-in-water micelles, nonstoichiometric zinc ferrite nanoparticles are fabricated. Control in size and composition is obtained. The nanocrystals are characterized by a spinel structure with two sublattices in tetrahedral and octahedral sites. Repartition of Fe3+ in the two sublattices is disordered. The particles are ferrimagnetic with a noncollinear structure (the magnetic moments are not strictly parallel). This is more pronounced with the smallest particles. Zinc ferrite nanocrystals exhibit unusual magnetic properties. The anisotropy constant, K, of nanocrystals differing by their sizes is determined by Mossbauer spectroscopy and from zero field cooled (ZFC) curves. The field cooled (FC) curves show a peculiar behavior with a decrease in the magnetization at very low temperature. The ZFC curves are highly sensitive to the applied field, indicating that Langevin law cannot be applied for zinc ferrite nanocrystals. These unusual magnetic properties are attributed to the inclusion of nonmagnetic zinc ions in ferrite nanocrystals, which induces a magnetic disorder.
• SSG or SFM state in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0009.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>CoFe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:math> nano-agglomerates fabricated by micro-emulsion method
  作者：Jana Poltierová Vejpravová、Václav Tyrpekl、Stanislav Daniš、Daniel Nižňanský、Vladimír Sechovský

  DOI：10.1016/j.jmmm.2009.12.044

  日期：2010.7

  We report on magnetic properties of CoFe2O4 nano-agglomerates obtained by micro-emulsion technique under specific conditions. The samples form a unique morphology as observed by transmission electron microscopy and scanning electron microscopy investigations. Concerning magnetic properties, they exhibit a considerable coercivity of almost 1T at 2K, which continuously decreases up to the characteristic temperature, T-g = 350 K. The temperature dependence of the zero-field cooled (ZFC) and field cooled (FC) magnetization, respectively, is furcated at the T-g, and the temperature dependencies of the a.c. susceptibility exhibit a frequency-dependent maximum at similar to T-g. The observed behavior is discussed in terms of the super-spin-glass (SSG) and the super-ferromagnetic (SFM) regime considering the morphology of the nano-agglomerates. (C) 2010 Elsevier B.V. All rights reserved.
• Ferromagnetic resonance of nonstoichiometric zinc ferrite and cobalt-doped zinc ferrite nanoparticles
  作者：J.F Hochepied、M.P Pileni

  DOI：10.1016/s0304-8853(01)00044-0

  日期：2001.5

  Ferromagnetic resonance spectra of zinc ferrite and cobalt doped zinc ferrite nanoparticles, measured at various temperatures, exhibit an invariant point at a given field. This makes it possible to determine the equation relating the resonance field shift to the peak-to-peak linewidth. When particles are frozen in a matrix in a magnetic field, the anisotropy constant of the material can be derived from the angular variation of the resonance field. This procedure is useful to determine the thermal dependence of the anisotropy constant, but is shown to require various freezing temperatures experiments to estimate the accuracy of the deduced anisotropy constant values. It is also shown that the angular dependence of the resonance field is similar for a uniaxial (zinc ferrite) and cubic (zinc ferrite containing 40% cobalt ions) anisotropy. This unexpected result is explained by the weakness of the texturation, leading to a distribution in easy axes directions. (C) 2001 Elsevier Science B.V. All rights reserved.
• Control of the Size of Cobalt Ferrite Magnetic Fluids:  Mössbauer Spectroscopy
  作者：N. Moumen、P. Bonville、M. P. Pileni

  DOI：10.1021/jp953324w

  日期：1996.1.1

  Fe-57 Mossbauer absorption spectroscopy studies have been performed in zero magnetic field in the temperature range 4.2-200 K, in cobalt ferrite (CoFe2O4) magnetic fluids that differ in the mean size of their particles. For particles with an average diameter of 2 and 3 nm, a quadrupolar doublet progressively replaces the six-line hyperfine field pattern as the temperature increases, This is attributed to a superparamagnetic regime with respect to the time scale tau(M) = 10(-8) s of Fe-57 Mossbauer spectroscopy. For particles with an average diameter of 5 nm, no such superparamagnetic behavior is observed; from the thermal variation of the mean hyperfine field, an axial anisotropy constant K-A = (8 +/- 2) x 10(6) erg cm(-3) is deduced. The whole set of data, together with magnetic measurements, strongly suggests that magnetic anisotropy in these particles has an axial rather than cubic character and that the anisotropy constant varies as the inverse of the square of the particle diameter.