Spin Configuration, Chemical Reactions, and Synthesis under EM Field
Abstract
This project embarked on the fascinating exploration of how electromagnetic fields, specifically microwaves, influence chemical reactions. While the accelerated heating effect of microwaves is well-known, our focus was on the less understood non-thermal interactions. We examined how microwaves interact with electron spin, altering energy and orbital configurations in certain materials. This has the potential to significantly alter reactivity characteristics, a process we not only aimed to understand, but also to control. Our work was driven by two core objectives: to control the material response to microwaves, and to create new synthesis methods using microwaves to drive reactions that are typically thermodynamically unfavorable. To support these goals, we developed a computational tool, which was released publicly. This tool allowed us to simulate molecular level reactions under the influence of microwaves. Particular attention was paid to certain transition metal compounds, specifically Jahn Teller solids and those with nearly degenerate spin states, such as Mott oxides. These compounds served as a prime platform for investigating electron dynamics and their interactions with microwaves. We paired theoretical study with hands-on experiments, using unique microwave equipment developed by our team and sponsored by the AFOSR DURIP program. Continual monitoring was facilitated through in-situ spectroscopy techniques. The fruits of this research are multifold. Not only did we lay the groundwork for future investigations into the extraordinary effects of electromagnetic fields on chemical reactions, but we also paved the way for the development of heated catalyst systems that can operate under extreme temperature gradients. Furthermore, we opened the door to synthesizing materials using methods that break away from traditional routes.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 18, 2023
- Accession Number
- AD1231202
Entities
People
- Daryoosh Vashaee
Organizations
- North Carolina State University