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Magnetic circular dichroism and the assignments of metal-ligand charge transfer states in Ru(bpy)32+ and related systems

✍ Scribed by James Ferguson; Elmars Krausz; Julian Vrbancich

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
399 KB
Volume
131
Category
Article
ISSN
0009-2614

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✦ Synopsis

The magnetic circular dichroism (MCD) and circular dichroism (CD) of Ru(bpy)F (RBY) doped in siqzleaystal Zn(bpy)s(BF& (BF) and dissolved in poly(vinyl alcohol) (PVA) are presented, as well as the MCD of a number of related materials in PVA. Two A terms of opposite sign are observed in the singlet region for RBY and other dicarboxylic acid bipyridine derivatives when all three ligands are identical. The largest A term is nor associated with the strongest absorption as previously assumed but with a weaker shoulder that is also responsible for the CD activity. The MCD and CD measurements force a reassignment of the singlet region of the absorption spectrum which must be compatible with the charge transfer origin of its intensity.

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