Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science
Authors: Liu, Lai Chung
Free Preview- Nominated as an outstanding PhD thesis by the University of Toronto
- Includes an accessible introduction to transient absorption spectroscopy, ultrafast electron diffraction, and related data science techniques
- Describes a groundbreaking process for the direct observation of atoms and molecules undergoing chemical reactions
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- About this book
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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 of potential 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.
- About the authors
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Dr. Lai Chung Liu received his PhD from the University of Toronto in 2019.
- Table of contents (7 chapters)
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Introduction
Pages 1-8
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Methods: Experimental Techniques and Data Science
Pages 9-63
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Ultrafast Structural Dynamics of (EDO-TTF)2X
Pages 65-89
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Photocyclization Dynamics of Diarylethene
Pages 91-104
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Photoinduced Spin Crossover in Iron(II) Systems
Pages 105-161
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Table of contents (7 chapters)
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Bibliographic Information
- Bibliographic Information
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- Book Title
- Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science
- Authors
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- Lai Chung Liu
- Series Title
- Springer Theses
- Copyright
- 2020
- Publisher
- Springer International Publishing
- Copyright Holder
- Springer Nature Switzerland AG
- eBook ISBN
- 978-3-030-54851-3
- DOI
- 10.1007/978-3-030-54851-3
- Hardcover ISBN
- 978-3-030-54850-6
- Series ISSN
- 2190-5053
- Edition Number
- 1
- Number of Pages
- XX, 239
- Number of Illustrations
- 4 b/w illustrations, 106 illustrations in colour
- Topics
