Browsing Chemistry Faculty Research, Publications and Presentations by Issue Date

Now showing items 21-40 of 234

  • Characterization of the Incommensurate Phase of [P(CH3)4]2CuCl4 

    PRESSPRICH, MR, MR BOND, RD WILLETT, and MA WHITE. 1989. "Characterization of the Incommensurate Phase of [P(CH3)4]2CuCl4." Physical Review B 39(5): 3453-3456. Copyright © 1989 American Physical Society.
    No abstract available.

  • Non-Abelian Effects in a Quadrupole System Rotating Around 2 Axes 

    ZWANZIGER, JW, M. KOENIG, and A. PINES. 1990. "Non-Abelian Effects in a Quadrupole System Rotating Around 2 Axes." Physical Review a 42(5): 3107-3110. doi:10.1103/PhysRevA.42.3107
    No abstract available.

  • The Phase-Transitions of Ferroelastic K2SeBr6 - a Calorimetric and X-Ray-Diffraction Study 

    Reproduced from ABRIEL, W., and MA WHITE. 1990. "The Phase-Transitions of Ferroelastic K2SeBr6 - a Calorimetric and X-Ray-Diffraction Study." Journal of Chemical Physics 93(11): 8321-8327, with the permission of AIP Publishing.
    No abstract available.

  • Measuring the Geometric Component of the Transition-Probability in a 2-Level System 

    ZWANZIGER, JW, SP RUCKER, and GC CHINGAS. 1991. "Measuring the Geometric Component of the Transition-Probability in a 2-Level System." Physical Review a 43(7): 3232-3240. doi:10.1103/PhysRevA.43.3232
    We describe the measurement of a component of the nonadiabatic transition probability in a two-level system that depends only on the path through parameter space followed by the Hamiltonian, and not on how fast the path ...

  • High-resolution, high-sensitive ac calorimeter. 

    Bednarz, Grzegorz, Brian Millier, and Mary Anne White. 1992. "High-resolution, high-sensitive ac calorimeter.." Review of Scientific Instruments 63(8): 3944-3952.
    A high-resoln., high-sensitivity, automated ac calorimeter capable of heat capacity measurements of very small samples (m < 20 mg) with a temp. resoln. of a few mK in the ac mode is described. This calorimeter also can be ...

  • Thermal conductivities of a clathrate with and without guest molecules. 

    Zakrzewski, Marek, and Mary Anne White. 1992. "Thermal conductivities of a clathrate with and without guest molecules.." Physical Review B: Condensed Matter and Materials Physics 45(6): 2809-2817. Copyright © 1992 American Physical Society.
    The thermal conductivities of Dianin's compd. [4-(p-hydroxyphenyl)-2,2,4-trimethylchroman] and its ethanol adduct in the temp. range 20-250 K are reported. This clathrate has the same stable structure both with and without ...

  • Heat capacity of gadolinium near the Curie temperature. 

    Bednarz, Grzegorz, D. J. W. Geldart, and Mary Anne White. 1993. "Heat capacity of gadolinium near the Curie temperature.." Physical Review B: Condensed Matter and Materials Physics 47(21): 14247-14259. Copyright © 1993 American Physical Society.
    High-resoln. ac calorimetric data near the Curie point are reported for several single crystals of gadolinium. The crit. temp. and the shape of the heat-capacity curve near Tc both depend on the sample-prepn. procedure, ...

  • Structure and Disorder of Phosphates in Ag2o-Agi-P2o5 Glasses 

    ZWANZIGER, JW, KK OLSEN, and SL TAGG. 1993. "Structure and Disorder of Phosphates in Ag2o-Agi-P2o5 Glasses." Physical Review B 47(21): 14618-14621. doi:10.1103/PhysRevB.47.14618
    We directly probe the microstructure of the different phosphates in several glasses in the Ag2O-AgI-P2O5 system, by means of variable angle correlation NMR spectroscopy. This two-dimensional experiment separates the ...

  • Thermal and Diffraction Studies of Phase-Transitions in the Incommensurate Compound [P(Ch3)(4)]2CuCl4 

    BEDNARZ, G., MA WHITE, MR PRESSPRICH, and RD WILLETT. 1994. "Thermal and Diffraction Studies of Phase-Transitions in the Incommensurate Compound [P(Ch3)(4)]2CuCl4." Physical Review B 49(2): 832-837. Copyright © 1994 American Physical Society.
    Calorimetric and x-ray-diffraction studies of the commensurate

  • A thermodynamic investigation of dynamical disorder in phase II of CBr4. 

    Reproduced from Michalski, Darek, and Mary Anne White. 1995. "A thermodynamic investigation of dynamical disorder in phase II of CBr4.." Journal of Chemical Physics 103(14): 6173-6176, with the permission of AIP Publishing.
    CBr4 is an archetypal example of a pseudospherical mol. that can form an orientationally disordered phase (phase I, 320 K < T < 365 K). At lower temps., phase II is the stable phase; although it must be more ordered than ...

  • Intramolecular Nucleophilic-Substitution by Phosphinate and Thiophosphinate Anions - Relative Rates of Formation of 5-Membered and 6-Membered Rings 

    CHAUDHRY, A., MJP HARGER, P. SHUFF, and A. THOMPSON. 1995. "Intramolecular Nucleophilic-Substitution by Phosphinate and Thiophosphinate Anions - Relative Rates of Formation of 5-Membered and 6-Membered Rings." Journal of the Chemical Society-Chemical Communications: 83-84.
    No abstract available.

  • Photoacoustic Investigation of the Temperature and Magnetic-Field Dependence of the Specific-Heat Capacity and Thermal-Conductivity Near the Curie-Point of Gadolinium 

    GLORIEUX, C., J. THOEN, G. BEDNARZ, MA WHITE, et al. 1995. "Photoacoustic Investigation of the Temperature and Magnetic-Field Dependence of the Specific-Heat Capacity and Thermal-Conductivity Near the Curie-Point of Gadolinium." Physical Review B 52(17): 12770-12778. Copyright © 1995 American Physical Society.
    The photoacoustic technique was used as a simple but accurate tool to simultaneously determine the specific-heat capacity C and thermal conductivity kappa of gadolinium in the neighborhood of the Curie point. One ...

  • Thermal conductivity of an organic clathrate: Possible generality of glasslike thermal conductivity in crystalline molecular 

    Reproduced from Michalski, D., and MA White. 1997. "Thermal conductivity of an organic clathrate: Possible generality of glasslike thermal conductivity in crystalline molecular." Journal of Chemical Physics 106(14): 6202-6203, with the permission of AIP Publishing.
    No abstract available.

  • Sodium distribution in sodium tellurite glasses probed with spin-echo NMR 

    Zwanziger, JW, JC McLaughlin, and SL Tagg. 1997. "Sodium distribution in sodium tellurite glasses probed with spin-echo NMR." Physical Review B 56(9): 5243-5249. doi:10.1103/PhysRevB.56.5243
    We present results on the spatial distribution of sodium cations in sodium tellurite glasses as a function of sodium oxide content, obtained using a spin-echo NMR experiment. Glasses were studied with sodium oxide content ...

  • Use of carbon black to eliminate surface charging effects in photoelectron spectroscopy measurements of powders 

    Obrovac, MN, Y. Gao, MN Richard, and JR Dahn. 1997. "Use of carbon black to eliminate surface charging effects in photoelectron spectroscopy measurements of powders." Applied Physics Letters 71(16): 2262-2264.
    No abstract available.

  • Explanation for the 4.8-V plateau LiCrxMn2-xO4 

    Obrovac, MN, Y. Gao, and JR Dahn. 1998. "Explanation for the 4.8-V plateau LiCrxMn2-xO4." Physical Review B 57(10): 5728-5733.
    Using the results of photoelectron spectroscopy (PES) measurements on LiCrxMn2-xO4 we provide an explanation for the origin of the 4.8-V plateau in Li/LiCrxMn2-xO4 cells. PES shows that the d bands derived from Mn 3d e(g) ...

  • Apparatus for dynamical thermal measurements of low-thermal diffusivity particulate materials at subambient temperatures 

    Murashov, VV, and MA White. 1998. "Apparatus for dynamical thermal measurements of low-thermal diffusivity particulate materials at subambient temperatures." Review of Scientific Instruments 69(12): 4198-4204.
    Apparatus for measurement of thermal diffusivity of particulate matter in the temperature range of 10-300 K is described. The basis of the measurement is modulated radial heat flow into a cylindrical sample, with a relatively ...

  • Why is there no low-temperature phase transition in NaOH? 

    Reproduced from Bessonette, PWR, and MA White. 1999. "Why is there no low-temperature phase transition in NaOH?." Journal of Chemical Physics 110(8): 3919-3925, with the permission of AIP Publishing.
    Although NaOH and NaOD exhibit parallel polymorphism at high temperatures, NaOD exhibits a low-temperature phase transition to a hydrogen-bonded antiferroelectric phase and no comparable transition has been found in NaOH. ...

  • Self-assembly of novel trimers using dipyrromethene ligands 

    Thompson, A., SJ Rettig, and D. Dolphin. 1999. "Self-assembly of novel trimers using dipyrromethene ligands." Chemical Communications: 631-632.
    Ligands comprising two dipyrromethene units linked at the beta-position have been used to prepare trimeric complexes with Zn-II and Co-II; the structure of the Zn-II complex is confirmed by X-ray analysis.

  • Intramolecular nucleophilic displacement of halogen by phosphinate and thiophosphinate anions: relative rates of formation of five- and six-membered rings 

    Chaudhry, A., MJP Harger, P. Shuff, and A. Thompson. 1999. "Intramolecular nucleophilic displacement of halogen by phosphinate and thiophosphinate anions: relative rates of formation of five- and six-membered rings." Journal of the Chemical Society-Perkin Transactions 1: 1347-1352.
    No abstract available.