English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

High-resolution ODMR spectroscopy of phenazine in single crystal and polycrystalline host matrices

MPS-Authors
/persons/resource/persons217876

Dinse,  Klaus−Peter
Max Planck Institute for Medical Research, Max Planck Society;

Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Fröhling, W., Winscom, C. J., Dinse, K., & Möbius, K. (1980). High-resolution ODMR spectroscopy of phenazine in single crystal and polycrystalline host matrices. Chemical Physics, 51(3), 369-382. doi:10.1016/0301-0104(80)80111-X.


Cite as: http://hdl.handle.net/21.11116/0000-0004-BE91-2
Abstract
Experiments have been performed on a model guest molecule, phenazine, in biphenyl single crystal and n-heptane polycrystalline host matrices to illustrate the two main contributions to inhomogeneous line broadening in ODMR spectroscopy. These arise from (a) inhomogeneous crystal fields experienced by the guest molecule in a host lattice and (b) unresolved hyperfine splitting. It is shown that the former may be reduced by making optical site selection during both excitation and detection. In the latter category, the most offensive group of nuclei is shown to be the guest protons and to a lesser extent the near-lying host protons. This contribution may be drastically reduced by fully deuterating both guest and host systems. Performing ODMR spectroscopy under these conditions allows the typical linewidths of 1–10 MHz to be reduced to ca. 200 kHz. The advantages of such high-resolution spectroscopy are manifold, not the least of which being that it forms a prerequisite for highly specific multiresonance experiments such as the recently developed ODNQR method.