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Creator | Title | Description | Subject | Date |
| 251 |
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Miller, Joel Steven | Structure, optical and magnetic behaviour of meso-tetraphenyl-porphyrinatoiron(III) tetracyanoethenide, [FeIII(TPP)]+[TCNE].-* | The direct redox reaction between tetracyanoethylene (TCNE) and meso-tetraphenylporphyrinatoiron(II), [FeII(TPP)], formed the electron transfer salt (ETS) [FeIII(TPP)][TCNE], which has been structurally, spectroscopically, and magnetically characterized. It has an extended one-dimensional linear ch... | Magnets; Spin; Electron | 2001 |
| 252 |
 |
Morse, Michael David | Ni? revisited: reassignment of the ground electronic state | Resonant two-photon ionization spectroscopy was used to study jet-cooled Ni2 produced by pulsed laser ablation of a nickel target in the throat of a supersonic nozzle using argon as the carrier gas. Spectral regions previously investigated using helium as the carrier gas were reinvestigated, and the... | | 1994 |
| 253 |
 |
Armentrout, Peter B. | Spin-orbit state-selected reactions of Xe+(2P3/2 and 2P1/2) with H2, D2, and HD | Spin-orbit state-selected reactions of X e + (2Pj ), j = 3/2 and 1/2, with isotopic molecular hydrogen (H2 , D2 , and HD) to form X e H + and XeD + are studied using guided ion beam mass spectrometry. Reaction cross sections are determined as a function of reactant kinetic energy from near thermal ... | Spin-orbit; Xenon ions; Hydrogen isotopes; Isotope effects; Ion-molecule reactions | 1989 |
| 254 |
 |
Miller, Joel Steven | Magnetization and static scaling of high-Tc disordered molecular-based magnet V(tetracyanoethylene)x¢y(CH3CN) with x ~ 1.5 and y ~ 2) | We report field (H) and temperature (T) -dependent magnetization (M) of a member of the new class of high-Tc molecular-based magnets V(tetracyanoethylene)x .y(solvent) with Tc in an accessible range (solvent =CH3CN). The M (H) at low T saturates slowly with increasing H. The random magnetic anisotro... | Temperature; Magnetic; Random | 1993 |
| 255 |
 |
Armentrout, Peter B. | C+(2P) + H2(D2,HD)→CH+(CD+) + H(D). I. Reaction cross sections and kinetic isotope effects from threshold to 15 eV c.m. | Total cross sections for the reactions of carbon (1 + ) ions with isotopic molecular hydrogen (H2, D2 , and HD) to form methyliumylidene (CH+ and C D + ) have been measured using guided ion beam techniques. Cross sections are reported as a function of the translational energy of the reactants fro... | Ion-molecule reactions; Isotope effects; Translational energy; Threshold behavior; Endothermic reactions | 1986 |
| 256 |
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Armentrout, Peter B. | Endothermic reactions of uranium ions with N2, D2, and CD4 | The assessment of new technology for isotope separation has revived an interest in the spectroscopy, properties, and reactions of uranium and its compounds. Newer methods which have been demonstrated include the use of lasers to selectively excite a particular uranium isotope with subsequent chemic... | Uranium ions; Nitrogen | 1977 |
| 257 |
 |
Miller, Joel Steven | Innovation in crystal engineering | The first CrystEngComm discussion meeting on crystal engineering has demonstrated that the field has reached maturity in some areas (for example: design strategies, characterization of solid compounds, topological analysis of weak and strong non-covalent interactions), while the quest for novel pro... | Research; Design; Molecular | 2002 |
| 258 |
 |
Morse, Michael David | Optical spectroscopy of jet-cooled FeC between 12 000 and 18 100 cm-? | Iron monocarbide has been investigated between 12 000 and 18 100 cm21 in a supersonic expansion by resonant two-photon ionization spectroscopy. Six new electronic states have been identified for which origins relative to the ground state have been determined. Three of these possess ?"=3, one possess... | | 1997 |
| 259 |
 |
Armentrout, Peter B. | Kinetic-energy dependence of competitive spin-allowed and spin-forbidden reactions: V++CS2 | The kinetic-energy dependence of the V++CS2 reaction is examined using guided ion-beam mass spectrometry. Several different ion sources are used to systematically vary the V+ electronic state distributions and elucidate the reactivities of both the ground and excited state V+ cation. | Carbon disulfide; Vanadium ions; Transition metal ions; Bond energies; Endothermic reactions; Exothermic reactions | 1999 |
| 260 |
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Armentrout, Peter B. | IR spectroscopy of cationized aliphatic amino acids: stability of charge-solvated structure increases with metal cation size | Abstract Gas-phase structures of alkali metal cationized (Li+, Na+, K+, Rb+, Cs+) proline (Pro) and N-methyl alanine have been investigated using infrared multiple photon dissociation (IRMPD) spectroscopy utilizing light generated by a free electron laser and computational modeling. Measured IRMPD... | | 2010-11 |
| 261 |
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Armentrout, Peter B. | Spin-orbit state-selected reactions of Kr+(2P3/2 and 2P1/2) with H2, D2, and HD from thermal energies to 20 eV c.m. | Spin-orbit state-selected reactions of K r + (2Pj), J = 3/2 and / = 1/2, with isotopic molecular hydrogen (H2 , D2 , and HD) to form KrH+ and Kr D+ are investigated using guided ion beam techniques. Reaction cross sections for each spin-orbit state are measured as a function of the relative trans... | Spin-orbit; Krypton ions; Hydrogen isotopes; Isotope effects; Potential energy surfaces; Ion-molecule reactions | 1986 |
| 262 |
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Miller, Joel Steven; Epstein, Arthur J. | Direct evidence of electron spin polarization from an organic-based magnet: [FeII(TCNE)(NCMe)2][FeIII Cl4] | Direct evidence of an organic-based magnet with a finite electron spin polarization at the Fermi edge is shown from spin-resolved photoemission of the [FeII(TCNE)(NCMe)2][FeIIICl4] organic-based magnet. The 23% majority-based spin polarization at the Fermi edge is observed at 80 K in zero applied fi... | Organic-based magnets; Electron spin polarization | 2009-05 |
| 263 |
 |
Stang, Peter J. | Incorporation of flexible pyridine-functionalized ligands into discrete supramolecules via coordination-driven self-assembly | Flexible, pyridine-functionalized ligands were self-assembled into discrete supramolecules of differing stoichiometries upon combination with various organoplatinum molecules. They are characterized by electrospray ionization mass spectrometry, 31P(iHI and 'H NMR. Despite its inherent flexibility, 3... | Self-assembly; Coordination-driven; Transition-metal-mediated; Flexible ligands; Pyridyl ligands; Supramolecules | 2004 |
| 264 |
 |
Armentrout, Peter B. | Kinetic energy dependence of dissociative charge-transfer reactions of He+, Ne+, Ar+, Kr+, and Xe+ with silane | Guided ion-beam techniques are used to measure the cross sections as a function of kinetic energy for reaction of SiH4 with He +, Ne +, Ar +, Kr +, and Xe +. State-specific data for the 2P3/2 ground spin-orbit states of Kr+ and Xe+ are also obtained. | Silane; Charge-transfer reactions; Ion-molecule reactions; Ion energy; Rare gas ions; Plasma systems | 1990 |
| 265 |
 |
Miller, Joel Steven; Epstein, Arthur J. | Viscous behavior in a quasi-1D fractal cluster glass | The spin glass transition of a quasi-1D organic-based magnet ([MnTPP][TCNE]) is explored using both ac and dc measurements. A scaling analysis of the ac susceptibility shows a spin glass transition near 4 K, with a viscous decay of the thermoremanent magnetization recorded above 4 K.We propose an ex... | Transition; Magnet; Magnetization | 2002 |
| 266 |
 |
Morse, Michael David | Photodissociation measurements of bond dissociation energies: Ti?+, V?+, Co?+, and Co?+ | The bond dissociation energies of Ti2+, V+2 , Co+2, and Co: have been measured from the sudden onset of predissociation in the photodissociation spectra of these molecules, yielding values of D?(Ti+2)=2.435+0.002 eV, D?(V+2)=3.140?0.002 eV, D?(Co+2)=2.7651?0.001 eV, and D?(Co+3)=2.086?0.002 eV. Thes... | | 1993 |
| 267 |
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Miller, Joel Steven; Epstein, Arthur J. | Proton spin-lattice and spin-spin relaxation times of (N(CH3)3)H)(I)(TCNQ) | Proton spin-lattice T(1) and spin-spin T(2) relaxation times are reported for (N(CH(3))(3)H)(I)(TCNQ) in the temperature range 150 to 5OOK. The overall relaxation process of the system can be described by contributions from rotation of the N(CH3)3H+ group about its symmetry axis, tumbling of that g... | Transition; Reorientation; Conductivity | 1978 |
| 268 |
 |
Miller, Joel Steven | Formation of Ni[C4(CN)8] from the reaction of Ni(COD)2 (COD = 1,5-cyclooctadiene) with TCNE in THF | The dissolution of Ni(COD)2 (COD = 1,5-cyclooctadiene) into dichloromethane leads to decomposition and formation of a room temperature magnetic material, whereas the reaction of Ni(COD)2 and tetracyanoethylene (TCNE) in THF forms paramagnetic materials including NiII[C4(CN)8](THF)2.xTHF. These resu... | Dinuclear complexes | 2007 |
| 269 |
 |
Truong, Thanh | Direct ab initio dynamics studies of N + H2<-->NH + H reaction | Kinetics of the N+H2<-->NH+H reaction have been studied using a direct ab initio dynamics method. Potential energy surface for low electronic states have been explored at the QCISD/ cc-pVDZ level of theory. We found the ground-state reaction is N(4S)+H2-->NH(3Σ-)+H. Thermal rate constants for this ... | Ab initio dynamics; Potential energy surfaces; Minimum energy path; Ground-state reaction; Rate constants | 2000 |
| 270 |
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Miller, Joel Steven | Pressure-induced phase transition in a molecule-based magnet with interpenetrating sublattices | The molecule-based magnet [Ru2(O2CMe)4]3[Cr(CN)6] contains two interpenetrating sublattices with sublattice moments confined to the cubic diagonals. At ambient pressure, a field of about 850 Oe rotates the antiferromagnetically coupled sublattice moments toward the field direction, producing a wasp... | | 2010-05 |
| 271 |
 |
Miller, Joel Steven | Crystal structure and magnetic properties of [Fe{N(CN)2}2(MeOH)2] a 2-D layered network consisting of hydrogen-bonded 1-D chains | A novel 2-D layered network structure [Fe{N(CN)2}2(MeOH)2] was synthesized and characterized by X-ray crystallography, vibrational, and magnetic susceptibility. The neutral 2-D stair-like framework consists of hydrogen-bonded infinite 1-D {Fe[N(CN)2]2} ribbons that pack in a staggered arrangement wh... | Solids; Dicyanamide; Ordering | 1999 |
| 272 |
 |
Poulter, Charles Dale | Purification and characterization of farnesyl diphosphate/geranylgeranyl diphosphate synthase | Farnesyl diphosphate (FPP)/geranylgeranyl diphosphate (GGPP) synthase, a bifunctional enzyme that synthesizes C15 and C2o isoprenoid diphosphates from isopentenyl diphosphate and dimethylallyl diphosphate, was purified to homogeneity from the archae-bacterium Methanobacterium thermoautotrophicum. Th... | Bifunctional enzyme; Methanobacterium thermautotrophicum; Synthases | 1993-05-25 |
| 273 |
 |
Armentrout, Peter B. | Role of methylation on the thermochemistry of alkali metal cation complexes of amino acids: N-methyl proline | Quantitative thermodynamic information is obtained from the study of the gasphase interactions of the alkali metal cation complexes of N-methyl proline (NMP) with Xe using a guided ion beam tandem mass spectrometer (GIBMS). Absolute bond dissociation energies (BDEs) of M+ = Li+, Na+, K+, and Rb+ to ... | | 2012-01-01 |
| 274 |
 |
Morse, Michael David | Resonant two-photon ionization spectroscopy of jet-cooled PdC | The first optical investigation of the spectra of diatomic PdC has revealed that the ground state has ?=0+, with a bond length of r0=1.712?. The Hund?s case (a) nature of this state could not be unambiguously determined from the experimental data, but dispersed fluorescence studies to be reported in... | | 1999 |
| 275 |
 |
Miller, Joel Steven | Structure of CrIIF(NCMe)2BF4. Rietveld refinement of a component of a physical mixture of unknown composition | The reaction of CrII(NCMe)4(BF4)2 and [NBun 4][TCNE] (TCNE ¼ tetracyanoethylene) in CH2Cl2 forms a solid that is a mixture of an amorphous reduced-TCNE containing phase(s) and a crystalline component. Rietveld refinement of the high-resolution, synchrotron X-ray powder pattern enabled the determi... | Organic-based magnets; Powder X-ray diffraction; Tetracyanoethylene | 2008 |
