Reference

Alignmental deterioration of homeotropically aligned liquid crystal cells under d

Alignmental deterioration of homeotropically aligned liquid crystal cells under d.c. electric field. I. Effect of liquid crystal composition and surface treatment. Nakano, Fumio; Sato, Mikio (Hitachi Res. Lab., Hitachi Ltd., Hitachi, Japan). Jpn. J. Appl. Phys., 15(10), 1937-41 (English) 1976. CODEN: JJAPA5. DOCUMENT TYPE: Journal CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic Processes) Section cross-reference(s): 75, 76 Alignmental deterioration in a homeotropically aligned cell was investigated, and the effects of nematic liq.-crystal compns. and surface treatments of electrodes on the deterioration were examd. The deterioration rate is detd. by the type of ionic doping compd. and the surface properties of treated electrodes rather than by the elec. cond. of liq.-crystal cells. The chem. structure of the cation of doping compds. has a strong influence on the deterioration. This fact suggests that the deteioration itself is directly related to some cathodic electrochem. reaction.Except for chemicals metioned above, 2138-24-1 and 61909-18-0 are also used. .

An infrared study of the solvation of halide ions by methanol and 2,2,2-trifluoroethanol

An infrared study of the solvation of halide ions by methanol and 2,2,2-trifluoroethanol. Ryall, Ralph R.; Strobel, Howard A.; Symons, Martyn C. R. (Paul M. Gross Chem. Lab., Duke Univ., Durham, N. C., USA). J. Phys. Chem., 81(3), 253-6 (English) 1977. CODEN: JPCHAX. 2138-24-1 and 16887-00-6 which are cas registry numbers are also used here. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Section cross-reference(s): 73, 69 IR spectroscopy was used to detd. the concn. of free and H bonded MeOH in CCl4 solns. of tetraalkylammonium halides (Cl-, Br-, I-) and to calc. consts. and free energies for the halide monosolvates. Formation consts. were also obtained for trifluoroethanol and these anions. Further, for the I--MeOH solvate, enthalpy and entropy values of formation were also detd. For both alcs., frequency shifts from the (O-H)free absorption on solvation are proportional to the free energy of H bond formation, and to the half-widths of the bands. F- was included in this part of the study, and, as expected, the order of shifts was F- > Cl- > Br- > I-. Formation consts. for trifluoroethanol solvates were an order of magnitude larger, reflecting the greater acidity of this alc. The spectral shifts on complex formation were also proportionately enhanced. .