dc.creator Chan, I. Y. en_US dc.creator Goldenberg, Barbara L. en_US dc.creator Sandorfy, C. en_US dc.date.accessioned 2006-06-15T14:07:04Z dc.date.available 2006-06-15T14:07:04Z dc.date.issued 1978 en_US dc.identifier 1978-TD-11 en_US dc.identifier.uri http://hdl.handle.net/1811/10616 dc.description Author Institution: Department of Chemistry, Brandeis University en_US dc.description.abstract A new technique of time-resolved magnetic resonance (TRMR) will be described. A phosphorescent molecule is excited by a $N_{2}$-pumped dye-laser. The phosphorescence is monitored shortly after the laser pulse using a boxcar integrator. Introduction of microwaves at magnetic resonance conditions causes a nutation of the spin system, thus modulating the phosphorescence output. It is therefore possible to detect magnetic resonance optically only a few nanoseconds after the creation of the coherent spin system. This time-resolved method is particularly useful in studying excited states with very short lifetimes. The technique is also advantageous in systems with such a high spin relaxation rate that conventional ODMR experiments are difficult. We will demonstrate the feasibility of this technique with benzil neat crystals as our test system. Benzil has a non-first-order phase transition at 84 K, and it phosphoresces at room temperature with a fair quantum yield. The new TRMR technique has been used at elevated temperatures in order to elucidate the nature of the phase transition, as well as the identity of the phosphorescing species at higher temperatures. These results will be presented and discussed. en_US dc.format.extent 147534 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title TIME-RESOLVED MAGNETIC RESONANCE OF BENZIL en_US dc.type article en_US
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