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X-ray transient absorption spectroscopies in the study of excited state structures

DOI: 10.1016/B978-0-12-823144-9.00177-1 DOI Help

Authors: Stuart A. Bartlett (Diamond Light Source)
Co-authored by industrial partner: No

Type: Book Chapter

State: Published (Approved)
Published: November 2022

Abstract: X-ray absorption spectroscopy (XAS) has become a very important analytical method for studying reactions under operating conditions and the method relies heavily on the use of tunable, high intensity X-ray radiation generated at synchrotron and X-ray Free Electron Laser (XFEL) facilities. Advances in methodology and instrumentation mean that X-ray absorption spectra can be measured in short time periods and can be used to probe catalytic reactions on a microsecond timescale. In this chapter the focus is TRansient X-ray Absorption Spectroscopy (TR-XAS) which operates effectively on submicrosecond timescales and is targeted at elucidating structural changes in molecular systems under photoactivation. The experimental set ups combine the use of laser pulses (to pump the reactions) with the X-ray pulses from the synchrotron (to probe the activated species) are described as well as the best methods to prepare and deliver the chemical samples into the reaction chamber. Recent results showing the benefits of using XAS in establishing the nature of catalytic processes are highlighted for a range of transition metal-based catalytic systems.

Journal Keywords: Catalysis; EXAFS; Instrumentation; Microsecond timescales; Photoreactions; Picosecond timescales; Synchrotron radiation; XANES; X-ray absorption spectroscopy

Subject Areas: Technique Development, Chemistry, Materials

Technical Areas:

Added On: 09/11/2022 11:32

Discipline Tags:

Physical Chemistry Technique Development - Chemistry Catalysis Chemistry Materials Science

Technical Tags: