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Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:

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单壁碳纳米管与 (R-) 氧化碳酸酸的功能化.

Michael Holzinger1, Juergen Abraham, Paul Whelan

  • 1Institut für Organische Chemie, Friedrich-Alexander Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany.

Journal of the American Chemical Society
|July 10, 2003
PubMed
概括

用烯功能化单壁碳纳米管 (SWCNTs) 提高了它们的溶解性,并允许金属离子复合. 这一过程在很大程度上保留了SWCNTs的电子特性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 有机化学 有机化学

背景情况:

  • 单壁碳纳米管 (SWCNTs) 具有独特的电子特性,但具有较差的可溶性.
  • 功能化对于为特定应用量身定制SWCNT属性至关重要.

研究的目的:

  • 为了研究SWCNTs使用 (R-) oxycarbonyl nitrenes的共价侧墙功能化.
  • 提高SWCNTs在有机溶剂中的可溶性.
  • 探索金属离子复合的潜力,并描述功能化SWCNT的结构和电子特性.

主要方法:

  • 通过添加烯,SWCNTs与各种有机群体的侧墙功能化.
  • 在有机溶剂 (TCE,DMSO,ODCB) 中的溶解度测量.
  • 金属离子复杂化研究.
  • 使用AFM,TEM,1HNMR,XPS,拉曼和UV/Vis-nIR光谱学进行表征.

主要成果:

  • 实现了多种功能组的共价结合,显著增加了SWCNT溶解度 (高达1.2 mg/mL).
  • 使用具有化性能的功能群证明了Cu(2+) 和Cd(2+) 离子的复合.
  • 在溶液中观察到细束 (10纳米直径) 的形成,通过显微镜和光谱学证实.
  • XPS证实了元素组成,而Raman和UV/Vis-nIR显示了电子性质的保留.

结论:

  • 烯介导功能化是一种有效的策略,可以提高SWCNT的溶解度,并引入新的功能.
  • 功能化过程对SWCNTs的内在电子特性产生最小的影响.
  • 功能化的SWCNT显示出涉及金属离子结合和溶液相处理的应用潜力.