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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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High relaxivity and stability of a hydroxyquinolinate-based tripodal monoaquagadolinium complex for use as a bimodal

Gaylord Tallec1, Pascal H Fries, Daniel Imbert

  • 1Laboratoire de Reconnaissance Ionique et Chimie de Coordination, SCIB, UMR-E 3 CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France.

Inorganic Chemistry
|August 12, 2011
PubMed

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.