Michael T. Melchior

The characterization of adsorbed carbon monoxide on colloidal palladium by infrared and high resolution 13C nuclear magnetic resonance spectroscopy

Carbon monoxide adsorbed on a stabilized 20 A palladium colloid in methylcyclohexane has been characterised by solution IR and high resolution NMR spectroscopy.

The Chemistry of Internal Combustion Engine Deposit — III. 13 C Nuclear Magnetic Resonance Employing 1 H Cross-Polarization and Magic Angle Spinning

In the previous two chapters, we have discussed the use of relatively classical techniques to characterize engine combustion deposits. Elemental analysis shows the deposits to contain 60 to 69 wgt.% carbon, 20 to 27 wgt.% oxygen, and 3 to 5 wgt.% hydrogen, with varying amounts of nitrogen, sulfur, and lube-derived inorganic elements. Both thermogravimetric analysis and insertion probe mass spectroscopy show the presence of volatile materials, and the mass spectroscopy suggests these volatile materials to contain, in part, polynuclear aromatic hydrocarbons. Infrared spectroscopy shows that the oxygen functionality includes ketones (possibly as anhydrides) and aryl and alkyl ethers.