Optical nuclear polarization as a consequence of the non-crossing rule 
(Level-Anti-Crossing): III. Experimental results and evidence for guest-host 
complexes in doped fluorene crystals

Stehlik, Dietmar; Rösch, Paul; Lau, P.; Zimmermann, Herbert; Hausser, Karl H.

doi:10.1016/0301-0104(77)80024-4

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Optical nuclear polarization as a consequence of the non-crossing rule (Level-Anti-Crossing): III. Experimental results and evidence for guest-host complexes in doped fluorene crystals

Stehlik, D., Rösch, P., Lau, P., Zimmermann, H., & Hausser, K. H. (1977). Optical nuclear polarization as a consequence of the non-crossing rule (Level-Anti-Crossing): III. Experimental results and evidence for guest-host complexes in doped fluorene crystals. Chemical Physics, 21(2), 301-309. doi:10.1016/0301-0104(77)80024-4.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0019-B127-3 Version Permalink: https://hdl.handle.net/21.11116/0000-0001-2CE3-E

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Creators:
Stehlik, Dietmar, Author
Rösch, Paul¹, Author
Lau, P.², Author
Zimmermann, Herbert^{1, 2, 3, 4}, Author
Hausser, Karl H.², Author

Affiliations:
1Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497712
2Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497705
3Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society, ou_1497700
4Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society, ou_1497749

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Abstract: Fluorene crystals doped with the guest molecules acridine, phenazine and anthracene have been studied before due to their strong Optical Nuclear Polarization (ONP) in low magnetic fields around 100 gauss. In this paper, these results together with supporting new data are interpreted in terms of ONP as a consequence of Level-Anti-Crossing (LAC) within the excited triplet state of a guest-host complex. The results permit a first detailed check of the theoretical model of ONP by LAC including the influence of electronic relaxation. Furthermore, they render the spectroscopic parameters needed for the characterization of the triplet-state complexes: -The zero-field splitting tensor and the orientation of its principal axes system with respect to the crystalline axes. -The proton hyperfine tensor, which is essentially due to one-proton spin in the CH2-group of the fluorene host molecule contributing to the complex.

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Language(s): eng - English

Dates: Submitted: 1976-10-04Published Online: 2001-11-15Date issued: 1977

Publication Status: Issued

Pages: 9

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Identifiers: DOI: 10.1016/0301-0104(77)80024-4

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Title: Chemical Physics

Other : Chem. Phys.

Source Genre: Journal

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Publ. Info: Amsterdam : Elsevier B.V.

Pages: - Volume / Issue: 21 (2) Sequence Number: - Start / End Page: 301 - 309 Identifier: ISSN: 0301-0104
CoNE: https://pure.mpg.de/cone/journals/resource/954925509371