MRI: Development of a Broadband Spectrometer with Multiple Antenna Detection and Chiral Coherent Quantum Control for Rotational Spectroscopy

该奖项得到了重大研究仪器、化学研究仪器以及化学测量和成像计划的支持。密苏里州S和密苏里大学的加里·格拉布斯二世和克里斯汀·唐奈尔教授与纽约州立大学的斯蒂芬·库克、詹姆斯·麦迪逊大学的保罗·拉斯顿和弗吉尼亚大学怀斯学院的加伦·塞多共同开发了一种最先进的啁啾脉冲傅里叶变换微波(CP-FTMW)光谱仪。该仪器用于气相分子转动光谱的采集。旋转光谱提供了一些关于分子结构的最详细的信息。这种多用户光谱仪为各种基础气相物理化学和化学物理领域的研究提供了显著提高的灵敏度和来源能力。此外，该仪器还促进了星际探测的实验室测量、新合成材料的实验基准、气相分子相互作用、包括手性在内的绝对分子结构测定以及鳗系元素化学等领域的科学发现和进步。该仪器的开发还为德克萨斯大学-里奥格兰德山谷大学主要是本科生和拉美裔服务机构的化学学生建立了一个申请密苏里州S&T化学博士项目的流水线计划，从而支持了科学的多样性。此外，该奖项还支持对来自代表性不足群体的本科生和研究生的培训，并促进对博士后研究员的培训和指导。博士后和学生研究人员经常有机会与化学和物理领域的资深研究人员和其他学生互动，为下一代科学家提供联网机会和丰富的学习环境。一种新的、最先进的气相分子结构旋转光谱测量仪器正在开发中。该仪器同时具有啁啾脉冲傅里叶变换微波(CP-FTMW，键长和键角相对结构)和微波三波混频(M3WM，手性绝对结构)能力。该仪器采用了最先进的多天线检测方法，以及多个进样喷嘴，以提高仪器的灵敏度。喷嘴是超音速分子束采样系统，具有加热激光烧蚀能力和直流放电能力，可用于研究与外来/不稳定或非挥发性物质有关的许多化学问题。作为这项研究的一部分，正在研究和量化系统改进的程度，特别是新的多天线检测方法。新仪器带来的科学进步使一群被称为中西部微波联盟(MWMC)的用户能够进行研究--该联盟由九所大学组成，主要是本科生，他们分享时间并参与仪器的开发。最终的委托仪器通过网站远程访问、控制和调度，允许国家和国际科学界在其整个生命周期内访问。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This award is supported by the Major Research Instrumentation, the Chemistry Research Instrumentation and the Chemical Measurement and Imaging programs. Professors Garry Grubbs II and Kristen Donnell of Missouri S&T, along with collaborators Stephen Cooke of SUNY-Purchase, Paul Raston of James Madison University, and Galen Sedo of the University of Virginia’s College at Wise, are developing a state-of-the-art Chirped Pulse Fourier Transform Microwave (CP-FTMW) spectrometer. This instrument is utilized in the collection of rotational spectra for gas phase molecules. Rotational spectra provide some of the most detailed information available about the structure of molecules. This multi-user spectrometer offers a significant increase in sensitivity and sourcing capabilities for research in a variety of fundamental gas phase physical chemistry and chemical physics fields. Moreover, this instrument promotes discovery and the progress of science in the areas of laboratory measurements of interstellar detection, experimental benchmarking for newly synthesized materials, gas phase molecular interactions, absolute molecular structure determinations inclusive of chirality, and actinide-element chemistry, among others. The development of the instrument also establishes a pipeline program for chemistry students of the primarily undergraduate and Hispanic Serving Institution, University of Texas-Rio Grande Valley, to apply for the Missouri S&T Chemistry PhD program, thereby supporting diversity in the sciences. In addition, this award supports training for undergraduate students and graduate students from underrepresented groups, and facilitates training and mentorship for postdoctoral fellows. The postdocs and student researchers have frequent opportunities to interact with senior researchers and other students in chemistry and physics, providing both networking opportunities and an enriched learning environment for next generation of scientists.A new, state-of-the-art instrument for gas phase molecular structure rotational spectroscopy measurements is being developed. This instrument possesses both Chirped Pulse Fourier Transform Microwave (CP-FTMW, relative structure for bond lengths and angles) and microwave three-wave mixing (M3WM, absolute structure for chirality) capabilities. The instrument implements a state-of-the-art approach of multiple-antennae detection, along with multiple sample introduction nozzles, to increase instrument sensitivity. The nozzles are supersonic molecular beam sampling systems that possess heated laser ablation capabilities, and direct current discharge capability for the investigation of many chemical problems associated with exotic/unstable or nonvolatile species. The degree of system improvement particularly of the novel multiple-antennae detection approach is being studied and quantified as part of this research. The scientific advancements offered by the new instrument enable research from a group of users known as the Midwest Microwave Consortium (MWMC) - a group of nine mostly primarily undergraduate universities that share time on and participate in the development of the instrument. The final, commissioned instrument features remote access, control, and scheduling through a website, allowing both national and international scientific community access throughout its lifetime.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.