Aquilanti Vincenzo, Bartolomei Massimiliano, Pirani Fernando, Cappelletti David, Vecchiocattivi France, Shimizu Yuichiro, Kasai Toshio
Dipartimento di Chimica, Universita di Perugia, 06123 Perugia, Italy.
Phys Chem Chem Phys. 2005 Jan 21;7(2):291-300. doi: 10.1039/b415212c.
Production, characterization and control of polarization states of molecules (specifically, alignment and/or orientation) are of importance for investigating in detail the stereodynamics of elementary processes involving elastic, inelastic and reactive events and also to prepare targets for selective photodynamical investigations. The focus here is on those molecular beam techniques which show perspectives in the applications offering appealing features for "duty cycle" and intensity characteristics. After a review of the basic experimental advances, mainly obtained in the last ten years, the attention will be addressed to recent studies carried out on the collisional alignment of hydrocarbon molecules and on orientation of symmetric top molecules by exploiting honeycomb hexapole fields. The first case is a prototype of "natural" polarization techniques, the second one of those where polarization is "forced" by external fields.
分子偏振态的产生、表征及控制（具体而言，排列和/或取向）对于详细研究涉及弹性、非弹性和反应性事件的基本过程的立体动力学以及为选择性光动力学研究制备靶标具有重要意义。这里关注的是那些分子束技术，它们在应用中展现出前景，具有吸引人的“占空比”和强度特性。在回顾了主要在过去十年中取得的基本实验进展之后，将把注意力转向最近关于烃分子碰撞排列以及利用蜂窝六极场对对称陀螺分子取向的研究。第一种情况是“自然”偏振技术的原型，第二种情况是偏振由外部场“强制”的情况。
