Molecular-orbital Studies Via Satellite-free X-ray Fluorescence: Cl-K Absorption and Kâ•fiValence-level Emission Spectra of Chlorofluoromethanes

Molecular-orbital studies via satellite-free x-ray fluorescence: Cl K absorption and K-valence-level emission spectra of chlorofluoromethanes.

Experiment and Theory of the Chemical Effects of Satellites on K X-ray Emission Spectra

IGhi satellite of l h x-ray fluorescence spectra were measured with two-crystal spectrometer. The intensity of the multivacancy satellite depends on the covalency of the orbital from which the electron(s) is(are) shaken off. However if a resonance condition holds, then the satellite is anomalously weak due to resonant electron transfer (RET) from the center atom to the ligands. Some examples of...

The effect of doping Graphene Quantum Dots with K, B, N, and Cl on its emitted spectrum

In this work, the effect of doping Graphene Quantum Dots (GQDs) on their emission spectra has been studied. First, graphene has been deposited on SiC substrate by using sublimation method. Second, doped-GQDs have been distributed on the surface of graphene via drop casting. The structure of the samples have been studied and characterized by X-ray diffraction (XRD), Scanning Electron Microscopy ...

SUB-THRESHOLD EXCITED Cl Kβ (K-V) X-RAY FLUORESCENCE FROM CF3Cl MOLECULE

With the availability of tirneable synchrotron radiation sources, unoccupied molecular orbits (below v a c m level) can be selectively populated producing highly excited neutral molecules. X-ray fluorescence spectra from molecules were obtained with excitation below the ionization threshold and were observed to have significant intensity changes, absolute and relative energy position shifts and...

Soft X-ray emission and absorption spectra in the O K region of oxygen incorporated in microporous carbon

Soft X-ray emission and absorption spectra in the O K region of oxygen incorporated in microporous carbon were measured using synchrotron radiation, in order to directly observe the oxygen and identify its chemical bonding states on the graphitic surface in microporous carbon. The O K X-ray emission spectrum exhibits a peak at 526 eV with a low-energy tail, and the absorption spectrum at the O ...