Critical X-Ray Source Upgrade to Chemistry Department X-ray Diffraction Facility

化学系 X 射线衍射设施的关键 X 射线源升级

• 批准号: RTI-2017-00009
• 负责人: Piers, Warren
• 金额: $ 10.41万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=616523
• 关键词: Critical; Ray; Source; Upgrade; Chemistry

Synthetic chemists require an array of tools in order to establish the structures of the molecules or materials they make. One of the most precise methods for determining solid state structures is single crystal X-ray crystallography. In this technique, X-ray radiation of known wavelength is passed through a small single crystal of an unknown compound, and the X-ray beam is diffracted into a pattern as a result of interaction with the nuclei of the atoms present in the crystal. The pattern is related to the position of the nuclei in three dimensional space, and through analysis of the pattern, the precise structure of the molecule can be determined, providing bond lengths, angles and other structural information. This information is crucial for making connections between the structure of a molecule or material and its function. As such, access to this technique is critical for the advancement of research leading to new molecules and materials with specific functions. For the research groups supported by this application those functions include materials that capture of carbon dioxide from air, molecular catalysts that mediate the conversion of carbon dioxide to usable fuels, new materials for batteries and light capture and new candidates for pharmaceuticals and agrochemicals. For all of these research programs, the determination of structure is fundamental to advancement. The equipment applied for deals with the X-ray source on a diffractometer instrument housed in the Department of Chemistry. The instrument in our facility is functional, but the X-ray source is obsolete and inefficient. Furthermore, the operation of the instrument is often halted due to the limitations associated with the outmoded X-ray source. Replacement of the X-ray source is therefore the most critical, high priority item, since the current source leads to long data collection times, poor data quality due to low intensity and instrument down time. With the source applied for, we will have a diffractometer with a modern, high intensity source imbuing the facility with much more versatility and efficiency in terms of the samples it can analyze. The diverse research programs embodied in the co-applicant group for this team grant provide benefits to Canadians in a wide array of chemical disciplines. Access to a state-of-the-art X-ray facility is critical to allow the pace of advancement to remain competitive.

合成化学家需要一系列工具来建立他们制造的分子或材料的结构。确定固态结构的最精确的方法之一是单晶X射线晶体学。在这种技术中，已知波长的X射线辐射穿过未知化合物的小单晶，并且X射线束由于与晶体中存在的原子核相互作用而衍射成图案。该图案与原子核在三维空间中的位置有关，通过分析图案，可以确定分子的精确结构，提供键长，角度和其他结构信息。这些信息对于在分子或材料的结构与其功能之间建立联系至关重要。因此，获得这种技术对于促进研究具有特定功能的新分子和材料至关重要。对于该应用程序支持的研究小组来说，这些功能包括从空气中捕获二氧化碳的材料，介导二氧化碳转化为可用燃料的分子催化剂，电池和光捕获的新材料以及药物和农用化学品的新候选人。对于所有这些研究计划，结构的确定是进步的基础。 申请的设备与化学系衍射仪上的X射线源有关。我们设施中的仪器功能正常，但X射线源过时且效率低下。此外，由于与过时的X射线源相关联的限制，仪器的操作经常停止。因此，更换X射线源是最关键、最优先的项目，因为目前的源导致数据收集时间长，由于强度低和仪器停机时间导致数据质量差。随着源申请，我们将有一个现代化的衍射仪，高强度源灌输设施与更多的通用性和效率方面的样品，它可以分析。 该团队补助金的共同申请人小组所体现的多样化研究计划为加拿大人在各种化学学科中提供了好处。获得最先进的X射线设施是至关重要的，使进步的步伐保持竞争力。