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Four Different Crystals Derived from a Novel Yellow Pyrazolyl Azo Pigment

机译：新型黄色吡唑基偶氮颜料衍生的四种不同晶体

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摘要

Four different crystals are presented in the present article that are derived from a novel yellow pyrazolyl azo pigment used for ink jet inks. This compound exhibits a good pigmentary performance in light and heat stability but rather poor in solvent fastness. X-ray structure analysis has been carried out in order to improve the present drawback from the structural point of view. The authors have unexpectedly isolated two kinds of five-coordinate bisazo Na complexes of the cis form (space group: P-1) as well as one Na-free monoazo compound (space group: C2/c). The formation of the Na complex is found to be caused by NaNO_2 used for the preparation of diazo components. Then, the authors tried to eliminate the sodium atom from the Na complex using hydrochloric acid in an attempt to develop a better pigment that assumes a trans configuration. The present Na-free compound in the trans form is found to crystallize in space group P-1 and is characterized by good solvent fastness in addition to the light and heat stability of the original title compound.
机译：本文介绍了四种不同的晶体，它们是从用于喷墨油墨的新型黄色吡唑基偶氮颜料衍生而来的。该化合物在光和热稳定性方面显示出良好的颜料性能，但在溶剂坚牢度方面较差。为了从结构的角度改善当前的缺陷，已经进行了X射线结构分析。作者出乎意料地分离出了两种顺式的五配位双偶氮钠配合物（空间群：P-1）和一种无钠的单偶氮化合物（空间群：C2 / c）。发现Na配合物的形成是由用于重氮组分制备的NaNO_2引起的。然后，作者试图使用盐酸从Na络合物中消除钠原子，以尝试开发出具有反式构型的更好的颜料。发现本反式的无Na化合物在空间群P-1中结晶，并且除原始标题化合物的光和热稳定性外，还具有良好的溶剂坚牢度。

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  • 来源
    《Journal of Imaging Science and Technology》 |2011年第2期|p.020504.1-020504.6|共6页
  • 作者

    Hiroki Shibata; Jin Mizuguchi;

  • 作者单位

    Department of Applied Physics, Yokohama National University, Yokohama 240-8501, Japan;

    Department of Applied Physics, Yokohama National University, Yokohama 240-8501, Japan;

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