Accession Number : ADA141027

Title :   Structural Electronic Relationships in Polymeric Solids.

Descriptive Note : Final rept. 1 Oct 79-28 Feb 83,


Personal Author(s) : Crosby,G A

PDF Url : ADA141027

Report Date : Feb 1983

Pagination or Media Count : 18

Abstract : The primary objective was to quantify the excited states of metal complexes so that their ultimate roles in photophysical, photochemical, and chemical processes could be assessed. The long-term goal was to arrive at a degree of sophistication such that materials with desired electrooptical properties could be designed at a molecular level and synthesized. A comprehensive study of osmium(II) (5d)6 complexes of D3 symmetry containing N-heterocyclic ligans was completed. The effect of solvents on the interactions of charge-transfer and ligand-field excited states was also quantified. A new series of complexes containing (nd)10 (n = 3,4) filled-shell metal ions was synthesized and studied spectroscopically revealing a new type of low-lying excited state. The structure of a typical example of this class of substances was determined by crystallography. A major accomplishment was the development of a multiple-state model for the lowest excited states of (nd)8 complexes, which was applied to several examples of rhodium(I) and iridium(I) complexes. Compounds of ruthenium(II) with N-heterocyclic tridentate ligands and D2d symmetry were also quantified spectroscopically.

Descriptors :   *Metal complexes, *Electronic states, Polymers, Charge transfer, Emission, Luminescence, Electrooptics, Molecular states, Osmium, Symmetry, Heterocyclic compounds, Ligands, Ions, Excitation, Platinum, Iridium, Rhodium, Ruthenium, Electrochemistry, Spectroscopy, Crystallography

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE