Téléchargez le livre : Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science

Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science

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Éditeur :

Springer


Collection :

Springer Theses

Paru le : 2020-09-10

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The thesis provides the necessary experimental and analytical tools to unambiguously observe the atomically resolved chemical reactions. A great challenge of modern science has been to directly observe atomic motions during structural transitions, and while this was first achieved through a major advance in electron source brightness, the information content was still limited and new methods for image reconstruction using femtosecond electron diffraction methods were needed. One particular challenge lay in reconciling the innumerable possible nuclear configurations with the observation of chemical reaction mechanisms that reproducibly give the same kind of chemistry for large classes of molecules. The author shows that there is a simple solution that occurs during barrier crossing in which the highly anharmonic potential at that point in nuclear rearrangements couples high- and low-frequency vibrational modes to give highly localized nuclear motions, reducing hundreds ofpotential degrees of freedom to just a few key modes. Specific examples are given in this thesis, including two photoinduced phase transitions in an organic system, a ring closure reaction, and two direct observations of nuclear reorganization driven by spin transitions. The emerging field of structural dynamics promises to change the way we think about the physics of chemistry and this thesis provides tools to make it happen.
Pages
239 pages
Collection
Springer Theses
Parution
2020-09-10
Marque
Springer
EAN papier
9783030548506
EAN PDF
9783030548513
Informations sur l'ebook
Nombre pages copiables
2
Nombre pages imprimables
23
Taille du fichier
18196 Ko
Prix
94,94 €
EAN EPUB
9783030548513
Informations sur l'ebook
Nombre pages copiables
2
Nombre pages imprimables
23
Taille du fichier
53043 Ko
Prix
94,94 €

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