Accession Number:

AD0770535

Title:

Electron Spin Resonance Studies of Luminescent Transition Metal Complexes,

Descriptive Note:

Final rept., 1 Jun 70-31 Aug 73,

Corporate Author:

NORTH CAROLINA STATE UNIV RALEIGH

Personal Author(s):

Report Date:

1973-10-22

Pagination or Media Count:

54.0

Abstract:

Nonradiative transitions in transition metal complexes are discussed. Emission and absorption spectra presented for d3Cr3 and d6Rh3, Ir3 and Ru2 complexes permit classification of the emission as localized orbital d-d or delocalized orbital. Quantum, yield, lifetime data and high resolution spectra for localized orbital complexes indicate that phosphorescence is the dominant type emission. Delocalized orbital emitters d6 here behave as Pi electron hydrocarbon emitters. The general Robinson-Frosch theory of nonradiative transitions that considers the nonradiative rate constant to be a product of an electronic factor and a vibrational factor can be used as the delocalized orbital emitters and are dominated by the heavy atom spin orbital coupling. The localized orbital emitters require addition of the Jortner-Freed model of weak and strong coupled surfaces to rationalize the vibrational factors.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE