Charge Transfer Bands
Charge transfer bands (CT) in electronic spectra - Migration of an electron from an orbital that is predominantly metal in character to an orbital that is predominantly ligand in character (MLCT) or vice versa (LMCT). -It is sensitive to solvent polarities -CT character often identified with solvatochromism - change in transition frequency with change in solvent permittivity
LMCT:
- Observed in the visible region of a spectrum when the metal is in a high oxidation state and the ligands contain non-bonding electrons (p-orbitals), e.g. MnO4-
MLCT:
- Observed when the metal is in a low oxidation state and the ligands have low-lying acceptor orbitals e.g. * orbitals of aromatic ligands
- diimines
- bipy, CN-, CO, NO
Read more about this topic: Solvatochromism
Famous quotes containing the words charge, transfer and/or bands:
“I charge thee, Satan, housed within this man,
To yield possession to my holy prayers.”
—William Shakespeare (1564–1616)
“I have proceeded ... to prevent the lapse from ... the point of blending between wakefulness and sleep.... Not ... that I can render the point more than a point—but that I can startle myself ... into wakefulness—and thus transfer the point ... into the realm of Memory—convey its impressions,... to a situation where ... I can survey them with the eye of analysis.”
—Edgar Allan Poe (1809–1849)
“While they were there, the time came for her to deliver her child. And she gave birth to her firstborn son and wrapped him in bands of cloth, and laid him in a manger, because there was no place for them in the inn.”
—Bible: New Testament, Luke 2:6,7.