HBCU Excellence in Research: Research and Education Center for Investigation of Chemical Transformations in Host-Guest Systems at Extreme Conditions

HBCU 卓越研究：极端条件下主客体系统化学转化研究和教育中心

• 批准号: 2302437
• 负责人: Mohammad Mahmood
• 金额: $ 51.12万
• 依托单位: Howard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2302437&HistoricalAwards=false
• 关键词: HBCU; Excellence; Research; Education; Center; HBCU; Excellence; Research; Education; Center

With support from the Chemical Structure, Dynamics, and Mechanisms-A (CSDM-A) program in the Division of Chemistry and the Office of Integrative Activities (OIA), Professor Mohammad Mahmood of Howard University and Dr. Alexander Goncharov of Carnegie Institution of Washington will use synchrotron and free electron laser X-ray diffraction, Raman, and optical spectroscopy to study host-guest compounds with a focus on C-N-O-H phase diagrams under extreme conditions of high pressures and temperatures. This work is intended to address the challenges associated with understanding the response of molecular materials and host-guest systems to the extreme conditions of high pressure and temperature and their chemical reactivity and transformations at these conditions. This research is a physical chemical study of relevance to earth, and planetary science as information about the structure, composition and stability of molecular and host-guest compounds can be used to address a variety of questions related to planetary interiors. Furthermore, this activity will open a possibility for the talented young scientists from underrepresented groups to be trained in an academic environment under combined supervision at Howard University and the Carnegie Institution to prepare them for potential careers in science.The proposed research program will be centered on investigations of matter under extreme conditions of high pressure and extreme temperatures (P-T). The focus will be on host-guest systems; both water cages hosts containing various guest molecules and co-crystalline systems will be studied. These systems are characterized by a wealth of physical and chemical phenomena, particularly under conditions of extreme temperature and pressure. This takes on additional relevance as some of these systems are thought to be components of planetary interiors. Professor Mahmood and Dr. Goncharov and their team including postdoctoral associates and graduate and undergraduate students will investigate the structure, composition and vibrational properties of these systems, as well as their physical and chemical transformations as a function of pressure and temperature. In so doing, the team aspires to establish potential connections of these systems with emergent phenomena such as high-temperature superconductivity. The experiments will involve state-of-the-art diffraction and spectroscopic techniques including synchrotron and XFEL diffraction, and Raman and optical spectroscopy performed with diamond anvil cells. As a result of these studies, it is anticipated that a better understanding of the chemistry and physics of host-guest complexes under extreme conditions will be developed.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.

With support from the Chemical Structure, Dynamics, and Mechanisms-A (CSDM-A) program in the Division of Chemistry and the Office of Integrative Activities (OIA), Professor Mohammad Mahmood of Howard University and Dr. Alexander Goncharov of Carnegie Institution of Washington will use synchrotron and free electron laser X-ray diffraction, Raman, and optical spectroscopy to study host-guest compounds with a在高压和温度的极端条件下，专注于C-N-O-H相图。这项工作旨在解决与了解分子材料和宿主 - 阵线系统对高压和温度极端条件及其在这些条件下的化学反应性和转化的极端条件相关的挑战。这项研究是一项与地球相关的物理化学研究，而行星科学作为有关分子和宿主 - 阵线化合物的结构，组成和稳定性的信息，可用于解决与行星室内设计相关的各种问题。此外，这项活动将为来自代表性不足的团体的才华横溢的年轻科学家提供可能在霍华德大学和卡内基机构的联合监督下接受学术环境中的培训，以使他们在科学领域的潜在职业做好准备。拟议的研究计划将集中在高压和极端温度和极端温度和极端温度（P-T）下。重点将放在主机 - 阵线系统上；将研究包含各种客体分子和共结晶系统的两个水笼宿主。这些系统的特征是大量的物理和化学现象，尤其是在极端温度和压力条件下。 这具有其他相关性，因为其中一些系统被认为是行星内饰的组成部分。 Mahmood教授和Goncharov博士及其团队，包括博士后员工以及研究生和本科生将研究这些系统的结构，组成和振动特性，以及它们的物理和化学转化，作为压力和温度的函数。 这样一来，团队渴望建立这些系统的潜在连接，并具有新兴现象，例如高温超导性。实验将涉及最新的衍射和光谱技术，包括同步加速器和XFEL衍射，以及用钻石砧细胞进行的拉曼和光谱。这些研究的结果是，预计将在极端条件下更好地理解对宿主 - 阵线复合物的化学和物理学的理解。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响来评估的支持标准。