THE JOURNAL OF
PHYSICAL CHEMISTRY
Registered in U. 5. Patent Ofice
@ Copyright, 1071, by tL Amerioan Chemical 500iely
VOLUME 75, NUMBER 22 OCTOBER 28, 1971
The Second Symposium on
Electron Spin Resonance Spectroscopy THEUNIVERSITY OF GEORGIA, ATHENS,GEORGIA
DECEMBER 7-9, 1970
Introductory Remarks
by Edward G.Janzen Department of Chemietry, Univereity of Georgia, Athens, Georgia
and Ralph Livingston Chemistry Diviaion, Oak Ridge National Laboratory, Oak Ridge, Tennessee
I n 1966 a major conference covering various applications of electron spin resonance in chemistry was held at Michigan State University, and the collection of papers along with discussion was published in this Journal [ J . Phys. Chem., 71, 1 (1967)l. The pace of research in this area has accelerated rapidly, and the subject has become of ever increasing importance to the chemist. With a lapse of four years since the initial conference, it was highly appropriate to hold a second symposium in order to summarize many of the new developments in electron spin resonance spectroscopy. The second symposium, like the first, was sponsored by the Division of Physical Chemistry of the American Chemical Society. The conference was divided into six sessions with each containing major talks setting the theme of the
sessions. These were followed by shorter contributions focusing on more detailed research areas. All participants, especially those giving major talks, were urged to prepare written accounts of their work so that they could be published together. This collection is the result, truly a gratifying response. Ample time was allowed for discussion a t the meeting, and participants were invited to prepare written accounts of their comments. Some of the papers are followed by these comments. In planning the meeting, we were aware of the great diversity of topics in electron spin resonance and tried to have a number of areas represented that are of special interest to the chemist. We did not include work on semiconductors but did include such areas as spin labels and selected problems of biological interest because of the attention they have 3383
3384 attracted for the chemist. With this diversity of coverage, we found that the meeting provided much stimulation for the participants and feel that collecting this material for publication will provide a useful addition to the esr literature. We wish to thank all of those who participated in the symposium and particularly those who prepared manuscripts so that this collection would be possible. A special word of thanks is due Professor F. A. VanCatledge of The Journal of Physical Chemistry for his editorial help,
EDITOR’S NOTE. For diverse reasons, not all of the invited papers at the Second Symposium on Electron Spin Resonance are included in this symposium issue. We will attempt however, insofar as it is possible, to provide leading references to the materials upon which these talks were based. We hope that this effort willl in some small way, compensate for their absence from this issue.
T h e Journal of Physical Chemistry, Vola76,N o . $8, 1971
EDWARD G. JANZENAND RALPHLIVINGSTON “Magnetic Resonance in Near-Degenerate Molecules : Benzene and Ion Radicals and Myoglobin” by M. Karplus: D. Purins and M. Karplus, J . Chem. Phys., 50, 214 (1969). R. G. Shulman, S. H. Glarum, and M. Karplus, J. Mol. B i d , 57,93 (1971). D. Purins and M. Karplus, J. Chem. Phys., to be published. “Optically Detected Magnetic Resonance in Zero Field and Optical Phase Procession in Phosphorescent Triplets” by C. B. Harris: C. B. Harris, D. S. Tinti, M. A. El-Sayed, and A. H. Maki, Chem. Phys. Lett., 4,409 (1969). M. J. Buckley, C. B. Harris, and A. H. Maki, ibid., 4, 269 (1969). M. J. Buckley and C. B. Harris, ibid., 5,205 (1970). C. B. Harris, J . Chem. Phys., 54, 972 (1971). C. B, Harris, Proceedings of the 5th Molecular Crystals Symposium, Philadelphia, Pa., 1970.
