By R. Kaptein (auth.), L. T. Muus, P. W. Atkins, K. A. McLauchlan, J. B. Pedersen (eds.)
Magnetic resonance has continuously been capable of shock with its skill to show new phenomena. simply while apparently to be coming into a quiet heart age it bursts into task with a few new manifestation of its versatility. This occurred many years in the past, whilst observations on anomalous intensities have been checked out extra heavily, and the pursuit of factors and extra facts laid the principles of the themes taken care of during this quantity. In organizing the NATO complicated learn Institute we tried to compile a bunch, yet certainly not all, of these who had contributed considerably to the topic, and to acquire from them a entire and distinct exposition of the topic. We have been rather frightened to prevent a suite of lectures that dealt exclusively with the idea of the topic, simply because a lot of the curiosity in chemically prompted magnetic polarization is because of its usefulness in purposes to chemical difficulties: it's a genuine chemical tech nique, not only an fun diversion for theoreticians. We set approximately organizing the direction with the belief of constructing it important to those that desired to use the process (for, in the end, with regards to nuclear polarization, CIDNP, the method can be utilized in any laboratory with minor amendment of ordinary equipment).
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Additional info for Chemically Induced Magnetic Polarization: Proceedings of the NATO Advanced Study Institute held at Sogesta, Urbino, Italy, April 17–30, 1977
3 Under these conditions, the nuclei are not completely dephased and the degree of broadening reflects the spin density distribution in the triplet state (6T21 ~ ~2). The uv irradiation of anthracene in bromobenzene resulted in differential line broadening which increased with decreasing anthracene concentration. From these results, the rate constant of exchange (k e = 3 x 109 lmol-lsec- l ) was determined. In the case of anthracene, the spin denSity distribution was known from ENDOR experiments, but for other organic materials line broadening due to singlettriplet exchange should be of value in characterizing the spin density distribution of the triplet state.
Schematic representation of the time dependence of the magnetization for zero-order (i) and first-order (ii) reactions producing CIDNP. •. ), dashed (---) and solid(---) lines represent equilibrium, chemically pumped, and observed net contributions to the magnetization, respectively. 32 R. G. , 'r- ~xt~ pJ J""o I 3 ppm. I a. ~ ~--IL-y"" J ,,,,, " ~'O 0 ~~ '> ~o 0 o Figure 2. Time depend ence of CIDNP from decomp osing m-chlo robenz oylt-buty lacety lperox ide in hexach lorace tone at 120°. Peaks labelle d C,P and R are discus sed in the text.
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