Fourier-transform infrared spectroscopy head groups

Table 1 lists many of the short-lived species detected in the gas phase with Fourier transform infrared spectroscopy. Two prominent groups are those headed by Bernath, now at the University of Waterloo, and by Howard at the National Oceanic and Atmospheric Administration (NO AA). The former group has used IR emission to study unstable diatomics produced in discharge sources or furnaces. The molecules studied in this group tend to be of astrophysical interest. The research team at NOAA mainly studies short-lived molecules of atmospheric significance. They employ a long flow tube fitted with White cell optics and coupled to a Bomem DA3.002 spectrometer. They usually make the transient they are interested in by performing a carefully controlled series of chemical reactions. 

Fourier transform infrared spectroscopy also provides information about conformation of bofh hydrocarbon chains and head groups. EPR spectios-copy (Box 8-C) with doxyl probes on carbon atoms at different depths within the bilayer has also been em-ployed. ... 

Immersion of fatty acid films into solutions of metal ions, as already indicated, results in an intercalation of the metal ions into the planes formed by the carboxylate head groups of the fatty acids. This can be accomplished in M-FA films where the FA has been regenerated by exposure to H2S [Eq. (4)] or in FA films deposited without any metal ions. Subsequent exposure of the films to H2S has been shown to result in the formation of the metal sulfide. This intercalation/sulfidation (i/s) cycle can be repeated several times to increase the concentration of the metal sulfide in the film. This process has been investigated forCdS (34,39,42,43), PbS (39,43,44), ZnS (39,43), and HgS (45) produced in M-FA films, using Fourier-transform infrared (FTIR) and UV/visible spectroscopies, QCM gravimetry, and atomic force microscopy (AFM). 

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