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首页> 外文期刊>Crystal growth & design >Effects of Additives on the Morphology of Thiamine Nitrate: The Great Difference of Two Kinds of Similar Additives
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Effects of Additives on the Morphology of Thiamine Nitrate: The Great Difference of Two Kinds of Similar Additives

机译：添加剂对硝酸盐形态的影响：两种类似添加剂的巨大差异

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摘要

The growth of thiamine nitrate, in supersaturated aqueous solutions in the absence and presence of sodium alkyl sulfates CH_(3)(CH_(2))_( n )SO_(4)Na and sodium alkyl sulfonates CH_(3)(CH_(2))_( n )SO_(3)Na was studied by a single seed crystal growth experiment. It was surprisingly found that the growth of the a -axis of thiamine nitrate is significantly inhibited by CH_(3)(CH_(2))_( n )SO_(4)Na, thus reducing the aspect ratio of thiamine nitrate, while the aspect ratio of thiamine nitrate in the presence of CH_(3)(CH_(2))_( n )SO_(3)Na remains almost constant. Furthermore, the mechanism of additives to modify the crystal morphology is proposed: both additives can inhibit the growth of thiamine nitrate by hindering the solute diffusion. However, their unusual behavior is due to the selective adsorption, which was caused by electrostatic and hydrogen bond interactions between solute and additive molecules. In particular, the anionic groups exposed at the end of the additives demonstrate an interesting case in which a small variation in the charge density and hydrogen bonding ability can lead to a marked difference in modifying the crystal growth behavior. The results obtained from this study should be helpful in the performance evaluation and selection of the morphology modifiers for thiamine nitrate crystals.
机译：硝酸硫酸盐的生长，在不存在和存在的过饱和水溶液中的烷基硫酸钠CH_（3）（CH_（2））_（n）SO_（4）Na和烷基磺酸钠CH_（3）（CH_（2 ））通过单种子晶体生长实验研究了_（n）SO_（3）NA。令人惊讶的是，通过CH_（3）（CH_（2））_（N）SO_（4）NA显着抑制硫胺素硝酸钠的生长，从而降低了硝酸亚氨酸硝酸盐的纵横比硫胺素硝酸盐在CH_（3）（CH_（2））_（n）SO_（3）NA存在下几乎恒定的纵横比。此外，提出了一种改性晶体形态的添加剂的机制：两种添加剂可以通过阻碍溶质扩散来抑制硝酸的生长。然而，它们的异常行为是由于选择性吸附，这是由溶质和添加剂分子之间的静电和氢键相互作用引起的。特别地，在添加剂的末端暴露的阴离子基团表明了一种有趣的情况，其中电荷密度和氢键能力的小变化可以导致改变晶体生长行为的显着差异。本研究获得的结果应有助于硫胺素硝酸盐晶体形态改性剂的性能评估和选择。

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  • 来源
    《Crystal growth & design》 |2018年第2期|共11页
  • 作者

    Dandan Han; Bo Yu; Yumin Liu; Shichao Du; Sohrab Rohani; Teng Zhang; Shiyuan Liu; Peng Shi; Haisheng Wang; Lina Zhou; Junbo Gong;

  • 作者单位

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    Department of Chemical and Biochemical Engineering The University of Western Ontario London Ontario N6A 5B9 Canada;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

    State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 People’s Republic of China;

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  • 正文语种 eng
  • 中图分类 晶体学;
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