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The Little Molecule That Could

机译:可能的小分子

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摘要

The creation of diatomic molecules bound by roaming electrons that allow a huge internuclear distance is some achievement. It opens the door to further experimental exploitation of the principles involved. Decades ago, chemists and physicists identified the various types of molecular bonding that are possible, including the standard ionic and covalent schema presented today in every introductory chemistry text. In the meantime, most practitioners of quantum chemistry have meandered on to larger species with the goal of predicting and elucidating the properties of huge molecules containing dozens, hundreds or even thousands of atoms. Yet the simplest molecules of all, the diatomics, which have a mere two atoms, still present puzzles and surprises. A case in point is the beautiful experiment by Bendkowsky et al. described on page 1005 of this issue. The authors used the delicate techniques of ultracold atomic physics to create and detect molecules made up of two rubidium atoms that are bound together by a ghostly quantum-mechanical force field at distances as large as 100 nanometres - greater than the size of a small virus.
机译:由漫游电子束缚的双原子分子的产生允许巨大的核间距离,这是一项成就。它为进一步试验所涉及原理开辟了大门。几十年前,化学家和物理学家确定了各种可能的分子键合类型,包括今天每本入门化学课本中介绍的标准离子和共价方案。同时,大多数量子化学的从业者都转向较大的物种,目的是预测和阐明包含数十,数百甚至数千个原子的大分子的性质。然而,仅有两个原子的双原子是最简单的分子,但仍然令人困惑和惊奇。一个典型的例子是Bendkowsky等人的美丽实验。在此问题的第1005页上进行了介绍。作者利用超冷原子物理学的精巧技术来创建和检测由两个rub原子组成的分子,这些原子被幽灵般的量子机械力场以最大100纳米的距离结合在一起-大于小病毒的大小。

著录项

  • 来源
    《Nature》 |2009年第7241期|p.975-976|共2页
  • 作者

    Chris H. Greene;

  • 作者单位

    Department of Physics and JILA, University of Colorado;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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