Temperature effect on the 13C NMR chemical shift of pressurized CO2 containing selected modifiers.

Temperature dependence of 13C NMR chemical shift of pressurized CO2 containing modifiers has been studied. Benzene, C6F6, C6F5OH, (CF3)2CHOH and [(CH3)2N]3PO were used as the modifiers. The 13C chemical shift of CO2 was found to show a different temperature dependence in the presence of selected modifiers.