Zero-field optically detected electron spin coherence of photoexcited organic triplet chromophores in Shpol'skii hosts

Optically detected electron spin coherence experiments in zero field are shown to be feasible for randomly oriented triplet chromophores. Pyrene is studied in an n-hexane Shpol'skii matrix at 1.7 K. As expected, the transient nutation is strongly damped, but two-pulse echoes can be observed wit...

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Bibliographic Details
Published in:Chemical physics letters 1988-06, Vol.147 (4), p.405-409
Main Authors: Tringali, A.E., Gilbert, S.A., Brenner, H.C.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Multiple resonances (including double and higher-order resonance processes, such as double nuclear magnetic resonance, electron double resonance and microwave optical double resonance)
Physics
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Summary:Optically detected electron spin coherence experiments in zero field are shown to be feasible for randomly oriented triplet chromophores. Pyrene is studied in an n-hexane Shpol'skii matrix at 1.7 K. As expected, the transient nutation is strongly damped, but two-pulse echoes can be observed with 90° pulse lengths chosen to be roughly one third the length corresponding to the first maximum in the nutation. The echo lifetime is markedly increased by deuteration, in agreement with previous single crystal work.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(88)80257-4