Electron spin resonance history

Binder, C. R. "Electron Spin Resonance Its Application to the Study of Thermal and Natural Histories of Organic Sediments", Ph.D. Thesis, Pennsylvania State University, 1965,... 

Schurr, M.R., Hayes, R. and Bush, L.L. (2001). The thermal history of maize kernels determined by electron spin resonance. Archaeometry 43 407-419. 

Progress in photochemistry could only be made following progress in spectroscopy and, in particular, the interpretation of spectra in at least semiquantitative terms, but history has shown that this was not enough. The arrival of new methods of analysis which permit determination of small amounts of products, the development of flash photolysis, nuclear magnetic resonance, and electron spin resonances which can yield valuable information about the natures of intermediate excited states, as well as of atoms and radicals, all have permitted the photochemist to approach the truly fundamental problem of photochemistry What is the detailed history of a molecule which absorbs radiation ... 

Electron Spin Resonance Studies To Explore the Thermal History of Archaeological Objects... 

Electron spin resonance (ESR) has an even longer standing history in the investigation of adsorption layers than NMR methods, due to the higher sensitivity. Its disadvantage is to require a spin probe, that can disturb the local molecular environment, which is a critical issue on molecular dimensions in monolayers. ESR and NMR methods can be considered complementary sources of information, and some of the very early NMR studies of grafted polymers at interfaces were in fact conducted complementarily to ESR [10]. A review of the application of ESR techniques to polymers at solid interfaces is given by Hommel [II]. 

FIGURE 17.11 Prof. James F. Harrison of the Michigan State University Chemistry Department carried out early calculations on the excited states of molecules using accurate configuration interaction methods, particularly BH [27] under the direction of his advisor Prof Leland C. Allen at Princeton University. He was one of the first to use accurate computational methods to study the triplet methylene molecule CH2 which is very important in synthetic organic chemistry. In particular, his calculation of the electron spin resonance parameters of CH2 was a rare case of computational theory guiding experimental spectroscopy at a time in the history of quantum chemistry that estabhshed the credibility of such calculations. He is also a contributor to Chapters 16 and 17. 

The OE was first described theoretically in a 1953 landmark paper by Albert Overhauser, who predicted for metals that if the electron spin resonance of the conducting electrons is saturated, the nuclei will be polarized to the same degree they would if their gyromagnetic ration were that of the electron spin [21]. In the same year, this theoretical concept was verified by Carver and Slichter for metallic lithium dispersed in oil, resulting in an enhancement factor of 100-fold [22]. Figure 2 shows the first DNP spectrum from a 1953 publication by Carver and Slichter [22]. Later the same authors demonstrated the DNP effect for Na and in sodium ammonia solutions [23]. The history of these early DNP experiments was recently reviewed by Slichter [45]. 

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