H2020Индивидуална стипендия2020–2022

LFC-MORE · Light-Field Controlled Molecular Reactions

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2020-09-01 → 2022-08-31
Финансиране от ЕС: 175 572 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Сблъсъците между молекули и атоми, като тези между въглерод и хелий, се анализират чрез контролиране на скоростта и квантовото им състояние. Това помага за по-доброто разбиране на химичните реакции и възможността в бъдеще да се определя техният резултат.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Light-Field Controlled Molecular Reactions

It is a long-held dream of physical chemists to get a complete understanding of chemical reactions, and to ultimately even fully control them. Traditional ways to manipulate the outcome and yield of such reactions include altering the temperature and pressure for the reaction, or adding a catalyst. In a bottom-up approach, a chemical reaction can be seen as a collision or interaction between a molecule and, for instance, an atom, another molecule, or light. The aim of this project was to control half-collisions between molecules and light using an electric field provided by a powerful laser. During the project, however, we realized that this was even more challenging than expected. Instead, we worked towards controlling collisions between two molecules or a molecule and an atom. We used a Zeeman decelerator to manipulate the velocity and quantum state of carbon atoms, and let them collide with helium atoms or hydrogen molecules in a controlled way. After the collision, we detected the scattered products using advanced detection techniques. This powerful combination of techniques allowed us to investigate these collision processes in high detail. Afterwards, we started investigating controlled reactive collisions between sulfur atoms and hydrogen molecules. Our experimental approach allows us to investigate these reactions in extremely high detail. In the future we hope to fully control and determine the outcome of such reactions.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

It is a long-held dream of physical chemists to not only study, but also fully control chemical reactions. The research aim of this project is to control such reactions using the photon catalysis method. This technique uses a focused, high-power, non-resonant pulsed laser to create a high electric field. This field can interact with the dipole it induces in a molecule. With this so-called dynamic Stark effect, we can alter energy levels and potential energy surfaces of the molecule under study and thereby control the chemistry in the system. Our first goal is to apply this relatively new and state-of-the-art technique to control the chemistry in a small benchmark molecule. This will serve as a proof-of-principle experiment and give us a better understanding of the technique and the molecular mechanisms it affects. Afterwards, our aim is to control conical intersections in relatively large biochemically relevant molecules and to create light-field assisted molecular switches. The experiments will be conducted in a molecular-beam machine. Three lasers will interact with the molecules. The first one will provide the high electric field to control the chemistry, the second laser will excite the molecules and thereby start the chemical reaction, and the third one will ionize the reaction products. The resulting ions and electrons will be recorded using the velocity map imaging technique. We will use state-of-the-art combinations of detection methods to elucidate the controlled chemical reactions in a very high level of detail. The photon catalysis method has the potential to become a relatively easy to implement and general technique that could advance many experiments from the level of understanding to the level of controlling molecular processes. It allows us to manipulate properties of matter at the molecular level and it could become an important tool in the fields of quantum information, molecular nanotechnology, and photopharmacology, for instance.

Оригинален текст от CORDIS (на английски).

Участници

STICHTING RADBOUD UNIVERSITEIT · NijmegenКоординаторНидерландия