The regeneration of LB films of (trimethylsilyl)cellulose (TMSC) (1) to ultrathin films of cellulose (2) is monitored by X-ray photoelectron spectroscopy (XPS). Subsequent chemical derivatization of these regenerated cellulose films with trifluoroacetic anhydride (TFAA) (3) to give the corresponding cellulose trifluoroacetate (5) was proven and followed by XPS as a function of exposure time in order to study hydroxyl accessibility. The derivatization behavior of regenerated cellulose films is compared with literature data on bulk cellulose materials with varying degrees of crystallinity. In contrast to the latter, the functionalization kinetics of the regenerated cellulose films indicates a low hydroxyl accessibility in conjuction with a high degree of order in these films.

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The “vibration–rotation” and “pure rotation” spectra of HF and DF in rare-gas matrices near 4°K have been studied, and assignments of the features due to the monomeric molecules have been made. The perturbations of the purely vibrational levels have been used to compute Lennard-Jones parameters for the interaction between the polar molecule and its neighboring atoms. The center of action of the dispersion forces has been calculated for HF, and the rotational perturbations have been evaluated. The spectral absorption frequencies are rather well reproduced. It has been found that the experimental frequency shifts are not consistent with a theory of rotational–translational coupling but that they, and other “anomalous” spectral features, are predicted by considerations of the anisotropies in the rotational potential function.

A two-band ir radiometer was used to measure the residual temperature of thin copper plates shocked with various explosives. Evidence indicates that a large shock-induced emittance has been largely compensated, and the results agree with other experiments but not with hydrodynamic theory. Preliminary results for the temperature of a copper shaped charge jet in flight yield a temperature of 432 °C.