Near Edge X-ray Absorption Fine Structure (NEXAFS) Spectroscopy of Molecules of Biological Interest: From Chemically Pure to Complex Samples

Souza, G. G. B. de; Gonzalez, Joselaine C.

doi:10.1007/978-3-030-28247-9_10

Cited by 2 publications

(2 citation statements)

References 60 publications

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“…On the experimental side, seminal XPS experiments on the ESCA molecule (ethyl trifluoroacetate) have demonstrated the sensitivity of core-spectroscopies such as X-ray photoemission spectroscopy (XPS) 9 and near edge X-ray absorption fine structure (NEXAFS) 10 to the immediate chemical environment resulting in several eV chemical shifts. NEXAFS studies of small volatile organic molecules have accessed the Kedges of second row atoms thereby highlighting the pre-edge window rich of absorption features manifesting the electronic structure of the valence shell [11][12][13][14][15][16][17] . On the theory side, a number of electronic structure theory methods have been adapted to study core-excitations and core-ionization 10,[18][19][20][21][22][23][24][25][26][27][28][29][30] .…”

Section: Introductionmentioning

confidence: 99%

Electron and ion spectroscopy of azobenzene in the valence and core shells

Carlini

Montorsi

et al. 2023

The Journal of Chemical Physics

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Azobenzene is a prototype and building block of a class of molecules of extreme technological interest as molecular photo-switches. We present a joint experimental and theoretical study of its response to irradiation with light across the UV to X-ray spectrum. The study of valence and inner shell photo-ionization and excitation processes, combined with measurement of valence photoelectron-photoion coincidence (PEPICO) and of mass spectra across the core thresholds provides a detailed insight onto the site- and state-selected photo-induced processes. Photo-ionization and excitation measurements are interpreted via the multi-configurational restricted active space self-consistent field (RASSCF) method corrected by second order perturbation theory (RASPT2). Using static modelling, we demonstrate that the carbon and nitrogen K edges of Azobenzene are suitable candidates for exploring its photoinduced dynamics thanks to the transient signals appearing in background-free regions of the NEXAFS and XPS.

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Section: Introductionmentioning

confidence: 99%

Electron and ion spectroscopy of azobenzene in the valence and core shells

Carlini

Montorsi

et al. 2023

The Journal of Chemical Physics

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“…It has been demonstrated that by using variable wavelength x-ray probes around the light element absorption edges of carbon, nitrogen and oxygen, the resonant behavior of chemicals containing these elements can be used as fingerprints of the molecular bonding environment, including the molecular orientation [1][2][3]. By measuring the spatial distribution of the x-rays scattered by a material, the ensemble nanoscale structure of molecules within it can then be probed.…”

Section: Introductionmentioning

confidence: 99%

A NIST facility for resonant soft x-ray scattering measuring nano-scale soft matter structure at NSLS-II

Gann

Crofts²,

Holland

et al. 2021

J. Phys.: Condens. Matter

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We present the design and performance of a polarized resonant soft x-ray scattering (RSoXS) station for soft matter characterization built by the national institute of standards and technology at the national synchrotron light source-II (NSLS-II). The RSoXS station is located within the spectroscopy soft and tender beamline suite at NSLS-II located in Brookhaven national laboratory, New York. Numerous elements of the RSoXS station were designed for optimal performance for measurements on soft matter systems, where it is of critical importance to minimize beam damage and maximize collection efficiency of polarized x-rays. These elements include a novel optical design, sample manipulator and sample environments, as well as detector setups. Finally, we will report the performance of the measurement station, including energy resolution, higher harmonic content and suppression methods, the extent and mitigation of the carbon absorption dip on optics, and the range of polarizations available from the elliptically polarized undulator source.

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Near Edge X-ray Absorption Fine Structure (NEXAFS) Spectroscopy of Molecules of Biological Interest: From Chemically Pure to Complex Samples

Cited by 2 publications

References 60 publications

Electron and ion spectroscopy of azobenzene in the valence and core shells

Electron and ion spectroscopy of azobenzene in the valence and core shells

A NIST facility for resonant soft x-ray scattering measuring nano-scale soft matter structure at NSLS-II

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