Electron spin-echo detection of nuclear quadrupole resonance in photoexcited triplets

Journal Article · Thu Jul 15 04:00:00 EDT 1982 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.443888· OSTI ID:5168228

Bowman, M K; Norris, J R

Electron spin-echo experiments have been performed on the photoexcited triplet state of phenazine in a fluorene single crystal host. The relatively strong nuclear modulation observed contains the nuclear quadrupole resonance spectrum of the nitrogen nuclei in the phenazine triplet. Detailed analysis gives a coupling of 4.10+/-0.07 MHz for e/sup 2/qQ/h and 0.22+/-0.05 for eta. The principal axes of the nuclear quadrupole interaction coincide with the principle axes of the zero field splitting. Electron spin-echo detection of nuclear quadrupole resonance is not limited to molecules where the quadrupole and the zero field splitting axes coincide and should therefore be a useful probe of the electronic and physical structure of excited triplets of complex organic and biological molecules.

• Research Organization: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5168228
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 77:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AZINES
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITED STATES
HETEROCYCLIC COMPOUNDS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENAZINE
PYRAZINES
QUADRUPOLE MOMENTS
RESONANCE
SPIN ECHO