Materials Literature
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A fluorescent reagent, N-(1-pyrenyl)iodoacetamide, was conjugated to rabbit skeletal muscle actin at the site of the most reactive sulfhydryl group, and fluorescence characteristics (excitation and emission spectra, quantum yields, lifetimes) of the conjugate were investigated. Associated with polymerization of labell…
Abstract The group theoretical methods by which the symmetries of normal modes in crystals may be determined are outlined, and a series of tables are presented to facilitate rapid determination of the selection rules for vibrational transitions. Emphasis is placed on the method of nuclear site group analysis in which…
The results of studies on the extracomplexes of metalloporphyrins namely the conditions of their formation, structure, spectroscopy, kinetics, and thermodynamics, are considered. The bibliography includes 245 references.
Crystals of yttrium aluminium garnet (YAG) emit a broad luminescent band peaking at 270 nm under X-irradiation at 4K. Exploitation of the magneto-optical properties of this emission makes possible measurement of EPR spectra of an excited state of the emitting centres. It is suggested that at least three different cent…
Conduction electrons in the low-temperature phase of crystalline WO 3-x (x>or approximately=0.0001) are found to be paired diamagnetically, forming bipolarons due to joint lattice distortion. They can be dissociated with light in a broad band of wavelengths peaked at 1.1 eV, as monitored by the appearance of W 5+ E…
The binding energies of all core levels in the N and O shells for the elements Hf to Bi have been measured by means of electron spectroscopy. The binding energies obtained are compared to previously reported values.
Abstract Es wird versucht, extreme Farbtonunterschiede bei Perylen‐3,4:9,10‐bis(dicarboximid)‐Pigmenten durch ihre Kristallstruktur zu erklären. Dabei werden drei schwarze Pigmente mit fünf entsprechenden roten verglichen. Das N,N′ ‐Di(2,6‐xylyl)perylen‐3,4: 9,10‐bis(dicarboximid) wird gesondert diskutiert.
The structure of the high-temperature, plastic form of lithium sulphate has been determined from neutron powder diffraction data collected at 908K. The structure is face-centred cubic, a=7.07 AA with the SO 4 2- ion situated at the origin and the oxygen atoms rotationally disordered about the sulphur atom. The Li + io…
Abstract Kinetics of the catalyzed decomposition of hydrogen peroxide in the presence of BF 3 etherate were investigated, and the basic kinetic parameters used in the discussion of the mechanism of this reaction were determined. The system hydrogen peroxide‐BF 3 etherate was used in the initiation of the radical polym…
X-ray luminescence spectra of single crystals of composition 0.9 ZrO2-0.1 Y2O3 and 0.9 ZrO2-0.09 Y2O3-0.01 Ln2O3 (Ln = Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb) are obtained at room temperature. A wide structureless band of luminescence with a maximum at about 500 nm is found. Thermostimulated luminescence is investigat…
The 17O NMR relaxation times, T1 and T2, for water in aqueous solutions of Gd(ClO4)3 and GdPDTA− and the EPR linewidths for the same complexes have been measured. These data are analyzed in terms of the Solomon-Bloembergen-Morgan equations for relaxation of a nucleus near a paramagnetic ion and McLachlan’s theory for…
A new transfer-matrix method is developed for low-energy-electron diffraction and other interface electronic-structure problems. This new procedure uses the waves incident on each layer as the basis for the transfer matrix. These waves are not singular at the plane of atoms, so that transfer can be done from one atom…
Measurements of the nonlinear conductivity in Nb${\mathrm{Se}}_{3}$ resulting from the high-temperature charge-density wave (CDW) have been made. The results show that the electronic properties of Nb${\mathrm{Se}}_{3}$ in the temperature regime where only one CDW exists are qualitatively the same as those in the the r…
The ion-ion correlations and a new crystal-structure determination of ${\ensuremath{\beta}}_{\mathrm{Na}}^{\ensuremath{'}\ensuremath{'}}$- and ${\ensuremath{\beta}}_{\mathrm{K}}^{\ensuremath{'}\ensuremath{'}}$-alumina reveal that the conducting ions are distributed between two independent sites instead of one given by…
The x-ray photoelectron intensity of the $1s$ core level of adsorbed oxygen in the form of a $c(2\ifmmode\times\else\texttimes\fi{}2)$ overlayer on Cu (001) exhibits strong angular dependence due to final-state diffraction at low electron take-off angles. The azimuthal anisotropies of the intensity, measured as $\frac…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text G. A. Massey, T. M. Loehr, L. J. Willis, and J. C. Johnson, "Raman and electrooptic properties of potassium titanate phosphate," Appl. Opt. 19, 4136-41…
A new empirical method for the analysis of solid solubility in alloys is proposed. The method is an extension of previous work by Darken and Gurry and by Chelikowsky. Each chemical element is characterized by three parameters: the atomic volume $V$, the electronegativity ${\ensuremath{\varphi}}^{*}$, and the electron…
Optical constants (absorption coefficient and refractive index) of unstrained GaSe samples at low temperature have been measured in the vicinity of the band-edge and exciton series. A quantitative fit with Elliott's model is given for the position and intensity of the levels. This does not necessitate any variation of…
The lattice theory of hard rods with anisotropic dispersion forces presented recently is extended to the case where the rods are dispersed in a diluent. Two systems are treated: (i) rods of axial ratio x diluted with solvent molecules having x=1, and (ii) rods of axial ratio xα mixed with homologs of axial ratio xβ. T…
A detailed study of the optical absorption and luminescence spectra associated with the precipitated phases of divalent europium in NaCl and KCl single crystals is reported. For the system NaCl-Eu${\mathrm{Cl}}_{2}$, three fluorescence bands peaking at 410, 439, and 485 nm were observed in crystals which were stored f…