Showing papers in "The Journal of Physical Chemistry in 1961"

Polycation-polyanion complexes: preparation and properties of poly-(vinylbenzyltrimethylammonium) poly-(styrenesulfonate)

Abstract: Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1961.

Polymorphism of the rare earth sesquioxides1

Abstract: Under equilibrium conditions the polymorphic forms of the rare earth sesquioxides transform reversibly from onen form to the other. The sesquioxides of the largest ions, La, Ce, and Pr, exhibit the A-type structure, Nd2O3 exists both as A- and C-type, while Sm2, Eu2O3, Gd2O3, Tb2O 3, and Dy2O3 exist both as B- and C- type oxides. The remaining rare earth sesquioxides occur only in the C-type structure. The C to B transition temperature increases linearly with decreasing ionic radius of the rare earth cation.

The effect of dissolved alkali halides on the raman spectrum of water1

Abstract: The Raman spectra of aqueous solutions of LiCl, LiI, KF, KI, CsF, and CsI were studied at several concentrations. The striking conclusion is that the intensity of both the bending and stretching vibrations are strongly affected by the nature of the anion, decreasing slightly in the presence of F-, increasing slightly with Cl- and increasing up to eight times in the presence of I-. Equally striking is the observation that there is no detectable effect of the cation, LiI and CsI yielded substantially identical spectra. There is no evidence for the presence of more than one kind of water molecule, either in pure water or in any of the solutions.