Abstract
Magnetic resonance spectroscopy thrives upon the abundance of nuclear and electronic spins in matter. Conjugated polymers in particular usually contain the following nuclear spins: 1H (100% natural abundance), 13C (1.1%), 14N (100%), 15N(0.37%) and 2H (0.01%). In special cases it is useful to isotopically enrich 13C, 2H and 15N. The nuclear spins carry magnetic moments that can be detected in NMR (nuclear magnetic resonance) experiments, and which provide information on local fields at the nuclear site. These local fields depend on the electronic structure and dynamics of the polymer. Similar arguments hold for electronic spins, which are usually detected in an ESR (electron spin resonance) experiment. It is therefore not surprising that a wealth of important information can be obtained from such magnetic resonance (MR) or spin resonance experiments.
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