H2020Индивидуална стипендия2015–2017

THz Photochemistry · Biased Proton Transfer by Ultrafast Electric Fields

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

Период: 2015-04-01 → 2017-03-31
Финансиране от ЕС: 159 461 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Терахерцовите импулси се използват за управление на химични реакции, като например преносът на протони. Това помага да се разбере как силни електрически полета могат да задвижат процеси, дори когато енергията им е ниска.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

THz Photochemistry: Biased Proton Transfer by Ultrafast Electric Fields

The main objective of the project is to drive chemical reactions by intense THz pulses and monitor the dynamics. As the photon energy of THz is way lower than activation energy of chemical reaction, this approach is rather counter-intuitive and novel. In order to realize this concept, the main practical goal is building a new spectroscopic setup including strong THz pulse and broad visible pulse generation, control over the relative delay time between two pulses with sub-ps time scale, and sensitive detection scheme.

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

Цел на проекта

Ultraviolet or visible light induces chemical transformations via electronic excitation. Infrared radiation, corresponding to low-frequency molecular vibrations, can also bring about photochemical reactions by multi-photon absorption. Then, how low photon energies can we reach in photochemistry? In this proposed research, I will realize a novel concept of terahertz photochemistry: activating chemical reactions with intense terahertz (THz) light of extremely low photon energy (1 THz = 4.1 meV). Based on this novel approach, I will study aqueous proton transfer in external electric fields, the process underlying key bioenergetic phenomena as well as renewable energy technologies. Despite its obvious relevance, it has remained elusive how E-fields affect the known proton transfer mechanism in aqueous systems. Ultrashort THz pulses, on the one hand, will allow monitoring the THz photochemical proton transfer reactions in real time on the femtosecond time scale. On the other hand, THz light pulses will also serve as external E-fields, which bias the proton transfer reactions. Due to recent technological development, sub-picosecond strong field THz pulses on the order of hundreds of kV/cm with near single-cycle duration can be generated in the host laboratory, and the short pulses allow for ultrafast time resolution of ca 300 fs. Systematic studies varying field strengths and solvents will provide important insights into the local and external E-field effects on the proton transfer and the non-equilibrium solvation dynamics. The possibility of THz control over proton transport processes will also be examined by applying THz pulses at different delay time after photo-initiation.

Оригинален текст от CORDIS (на английски).

Участници

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV · MUNCHENКоординаторГермания