Isotropic NMR Shifts in Paramagnetic Cobalt and Nickel Phosphine Complexes
作者： William DeW. Horrocks , Gerd N. LaMar
DOI: 10.1007/978-3-7091-3650-8_17
关键词: Paramagnetism 、 Hyperfine structure 、 Diamagnetism 、 Atomic physics 、 Spin (physics) 、 Spin isomers of hydrogen 、 Resonance 、 Proton 、 Curie's law 、 Nuclear magnetic resonance
摘要: The conditions necessary for observation of proton magnetic resonance spectra in paramagnetic systems are well established (1). Either the electronic spin-lattice relaxation time, T1, or a characteristic exchange Te, must be short compared with isotropic hyperfine contact interaction constant, Ai, order resonances to observed. Proton often shifted hundreds cps from their values diamagnetic substances. These shifts may arise two causes, and pseudocontact interactions. shift arises existence unpaired spin -density at resonating nucleus is described by ·1} (2) obeying Curie law, (math)
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