Magnetic and Electric Properties of Organic Conductors Probed by 13C-NMR Using Selective-Site Substituted Molecules

摘要: Quasi-One and quasi-two dimensional organic conductors consisting of TTF derivatives such as BEDT-TTF (bis-(ethylene-dithio)-tetra-thia-fulvalene) TMTCF (C = S; TMTTF: tetra-methyl-tetra-thia-fulvalene, C Se; TMTSF: tetra-methyl-tetra-selena-fulvalene) have been well investigated in condensed matter physics because interest the emerging electric magnetic properties, spin density wave, charge order, superconductivity, anti-ferromagnetism, so on. To probe electronic state, nuclear resonance (NMR) is one most powerful tools microscopic magnetometer. A number 13C-NMR studies performed double-site central 13C=13C bond substituted molecules. However, problems with coupled system complicated interpretation for observations on NMR. Therefore, single-site 13C-enriched molecules are desired. We summarize problem Pake doublet preparation 13C-susbstituted also demonstrate superiority molecule utilizing hyperfine coupling tensor.