Photoelectron Spectroscopy AKA Photoemission Spectroscopy.

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Presentation transcript:

Photoelectron Spectroscopy AKA Photoemission Spectroscopy

Types of PES

X-ray Photoelectron Spectroscopy

PES - Chlorine Energy is scaled in MJ/mol. 1 megajoule = 1000 kJ Credit to Thomas Silak for the PES Excel Spreadsheet

PES - Chlorine 1s 1s electrons require the most energy for removal due to their proximity to the nucleus. 1s 2s Credit to Thomas Silak for the PES Excel Spreadsheet

PES - Chlorine 3p 3p peak essentially represents the first ionization energy, as an outermost electron is being removed. 1s 2s Credit to Thomas Silak for the PES Excel Spreadsheet

Carbon and Nitrogen Removal of electrons from nitrogen requires more energy, due to a greater nuclear charge. 1s 2s 2p Credit to Thomas Silak for the PES Excel Spreadsheet

Oxygen and Nitrogen 2p 2p electron is easier to remove in oxygen due to electron- electron repulsion is paired 2p orbital. 1s 2s 2p Credit to Thomas Silak for the PES Excel Spreadsheet

Sodium and Potassium Electrons are harder to remove from potassium, due to the greater nuclear charge. The first ionization energy is smaller, because the electron is farther from the nucleus, and more shielded. 1s 2s 3s 3p 2p Credit to Thomas Silak for the PES Excel Spreadsheet 4s 2p 3s