If the nuclear spins of the two hydrogen atoms in water are oriented in the same direction, it is called ortho-water. If they are arranged in different directions, it is known as para-water.
如果水分子中的两个氢原子核自旋以相同的方向取向,则称为正水分子。如果他们异向自旋,则被称为负水分子。
Given that the isomers are very similar, it has been particularly challenging to separate them out. But co-author Prof Stefan Willitsch and his colleagues succeeded in doing it using electric fields.
鉴于异构体非常相似,所以将它们分开非常具有挑战性,但Stefan Willitsch教授和他的同事成功地利用电场进行了水分子分离。
They were then able to investigate how the different forms of water reacted with another chemical.
随后,他们就能够研究不同形式的水分子与另一种化学品的反应情况。
They used ultracold diazenylium ions (a form of nitrogen) for this test. The researchers found that para-water reacted about 25% faster with the diazenylium than ortho-water.
他们使用氮离子(一种氮的形式)进行了这项测试。研究人员发现,与正水分子相比,负水分子化学反应速度提高了25%左右。
Because the rotation of H2O molecules is affected by the nuclear spin, different attractive forces act between the partners in this chemical reaction.
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