Now showing items 31-40 of 140
Spectroscopic and optically detected magnetic resonance studies of PO2-in potassium chloride. I. Electronic and vibrational states
(Elsevier, 1979-06-01)
The phosphorescence and phosphorescence excitation spectra of phosphorus activated single crystals of potassium chloride have been examined at 4.2 K. The "color center" responsible for the blue emission in these samples ...
Molecular mobilities of soluble components in the aqueous phase of chromaffin granules
(Elsevier, 1977-03-29)
NMR relaxation times have been used to characterize molecular motion and intermolecular complexes in the aqueous phase of bovine chromaffin granules. Partially relaxed 13C and proton spectra have been obtained at 3 and ...
The oxidation of ethylene-1,2-d2 over a silver catalyst studied by microwave spectroscopy
(Elsevier, 1978-03-30)
Stereospecific ethylene-1,2-d2 was oxidized to ethylene oxide-1,2-d2 over Ag catalysts in a flow reactor at 180-280 [deg]C. The epoxide products did not completely randomize for any of the reaction conditions explored. ...
Structure and vibrational assignments for PCl5 : An electron diffraction study
(Elsevier, 1971-04)
Gas-phase phosphorus pentachloride is a trigonal bipyramid with axial bonds 0.104+/-0.01 A (e.s.d.) longer than equatorial bonds. The mean bond lengths are 2.061+/-0.002 A. Amplitudes of vibration were determined, resolving ...
A broadband NMR spectrometer for field stabilization in the range 4–23 kG
(The American Institute of Physics, 1974-01)
A broadband ``time‐shared'' NMR spectrometer has been constructed for the purpose of magnetic field stabilization. An error signal for field correction is derived from the 7Li or 1H resonance of a saturated LiCl solution ...
Rotational Diffusion and Magnetic Relaxation of 119Sn in Liquid SnCl4 and SnI4
(The American Institute of Physics, 1972-12-15)
Longitudinal and transverse relaxation times of 119Sn have been measured as a function of temperature in liquid SnCl4 and SnI4. For SnCl4, T1 is a monotonically decreasing function of temperature and is dominated mechanistically ...
Phase III crystal structure and 115 K phase transition of hexamethylbenzene
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1977-02)
High-resolution spectroscopic data—Raman, infrared, and electronic—have been employed for the study of low-temperature, phase III, hexamethylbenzene and its associated λ-type phase transition. Phase III is trigonal, with ...
Raman spectra of phenothiazine and some pharmaceutical derivatives
(Elsevier, 1976-05)
The laser-Raman spectra of several phenothiazines in the region 600-1600 cm-1 are reported. The major bands are assigned to ring modes or to vibrations of the alkyl side-chains.
Error matrices in gas-electron diffraction : I. Effects of systematic errors in intensities
(Elsevier, 1973-02)
Electron diffractionists have largely ignored the effect of systematic errors in intensities upon derived molecular parameters. The present investigation proposes a treatment of such errors in terms of certain coefficients ...
Molecular structure of nitrogen trichloride as determined by electron diffraction
(Elsevier, 1971-10)
Nitrogen trichloride was found to have a bond length of rg = 1.759 +/- 0.002 A and a Cl-N-Cl angle of 107.1 +/- 0.5[deg]. The bond angle is larger than that found in NF3, consistent with the (recently revised) trends ...