中性分子结构异构体选择剂
A selector for structural isomers of neutral molecules
摘要：
我们已经选择和空间分离的两种构象的3-氨基苯酚（C $_6$ H $_7$ NO）存在于分子束。类似于离子在四极滤质器中基于其质荷比的分离，中性构象在交流电四极选择器中基于其不同的质量-偶极矩比分离。对于给定的交流频率，各个构象经历不同的聚焦力，导致通过选择器的不同传输。这些实验表明，可以制备符合者选择的大分子样品，为气相生物分子的研究提供了新的可能性。
英文摘要：
We have selected and spatially separated the two conformers of 3-aminophenol (C$_6$H$_7$NO) present in a molecular beam. Analogous to the separation of ions based on their mass-to-charge ratios in a quadrupole mass filter, the neutral conformers are separated based on their different mass-to-dipole-moment ratios in an ac electric quadrupole selector. For a given ac frequency, the individual conformers experience different focusing forces, resulting in different transmissions through the selector. These experiments demonstrate that conformer-selected samples of large molecules can be prepared, offering new possibilities for the study of gas-phase biomolecules.
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