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- W2165890497 abstract "Abstract Rapid magic angle spinning has been used to obtain sideband-free high field 13 C n.m.r. spectra of coal tar pitches in the solid state. However, the unfavourable cross-polarization and 1 H relaxation characteristics make it difficult to accurately estimate concentrations of quaternary aromatic carbon using the dipolar dephasing method. The concentrations of bridgehead aromatic carbon in the whole pitch and toluene-insoluble fraction investigated were deduced using a combination of solid and solution state n.m.r. and elemental analyses." @default.
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- W2165890497 date "1989-12-01" @default.
- W2165890497 modified "2023-09-26" @default.
- W2165890497 title "Evaluation of the aromatic structure of coal tar pitch by solid and solution state n.m.r." @default.
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- W2165890497 doi "https://doi.org/10.1016/0016-2361(89)90303-7" @default.
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