Low-Cost, Balle-Flygare-Type Cavity Fourier Transform Microwave Spectrometer and Pure Rotational Spectroscopy Laboratory for Teaching Physical Chemistry and Astronomy

Low-Cost, Balle-Flygare-Type Cavity Fourier Transform Microwave Spectrometer and Pure Rotational Spectroscopy Laboratory for Teaching Physical Chemistry and Astronomy
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用于物理化学和天文学教学的低成本 Balle-Flygare 型腔体傅里叶变换微波光谱仪和纯旋转光谱实验室

DOI:
10.1021/acs.jchemed.0c00934
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发表时间:
2021
影响因子:
3
通讯作者:
Grubbs, G. S.
Grubbs, G. S.
中科院分区:
化学2区
文献类型:
--
作者:
Duerden, Amanda;Moon, Nicole;Grubbs, G. S.

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很少有实验室练习存在,介绍本科生的概念和旋转光谱学中使用的仪器。由于本科实验室培训的这一差距,苯甲腈的纯转动光谱教学实验室已经开发和报告。由于苯甲腈在太空中的发现,分子光谱技术和目标适用于物理化学和天文学学科。由于偶极矩的大小和所选分子的相对安全性,实验室方法允许本科生直接加载,调整,测量和分配光谱使用相同的量子化学方法和光谱分配工具,可用于该领域的研究人员。在这个实验室教授的概念包括刚性和半刚性转子,以及低层次的核电四极耦合哈密顿。为了最大限度地减少预算,让学生得到动手培训与旋转光谱仪器,一个互动的,低成本的,Balle-Flygare型,腔傅里叶变换微波(FTMW)光谱仪的研究级质量的开发和报告。实验室练习的实施,锻炼的时间,和学生对锻炼的反应也有报道。
Few laboratory exercises exist that introduce undergraduate students to both the concepts and instrumentation used in rotational spectroscopy. Because of this gap in undergraduate laboratory training, a teaching laboratory for the pure rotational spectroscopy of benzonitrile has been developed and reported. Owing to benzonitrile’s recent discovery in space, the molecular spectroscopic technique and target are applicable to both the physical chemistry and astronomy disciplines. Because of the size of the dipole moment and relative safety of the molecule chosen, the laboratory approach allows undergraduates to directly load, tune, measure, and assign spectra using the same quantum chemical approaches and spectroscopic assigning tools available to a researcher in the field. Concepts taught in this laboratory include the rigid and semirigid rotor, as well as low-level nuclear electric quadrupole coupling Hamiltonians. To minimize the budget and allow the students to get hands-on training with the rotational spectroscopy instrumentation, an interactive, low-cost, Balle-Flygare-type, cavity Fourier transform microwave (FTMW) spectrometer of research-grade quality was developed and is reported. Implementation of the laboratory exercise, time of exercise, and student response to the exercise is also reported.
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