Browsing by Subject "electron"
Now showing items 1-19 of 19
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Addition of Electron-Rich Aromatics to Azafullerenium Carbocation. A Stepwise Electrophilic Substitution Mechanism
(2003)(Matrix presented) The reaction between the C59N+ carbocation and the electron-rich aromatic compounds toluene and anisole has been mechanistically studied. The measured intermolecular kinetic isotope effects are consistent ...
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Chiral control of current transfer in molecules
(2011)Electron transmission through chiral molecules induced by circularly polarized light can be very different for mirror image structures. This behavior is described in terms of current transfer: the transfer of both charge ...
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Dexter Energy transfer pathways
(2016)Energy transfer with an associated spin change of the donor and acceptor, Dexter energy transfer, is critically important in solar energy harvesting assemblies, damage protection schemes of photobiology, and organometallic ...
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Direct observation of ultrafast long-range charge separation at polymer-fullerene heterojunctions
(2014)In polymeric semiconductors, charge carriers are polarons, which means that the excess charge deforms the molecular structure of the polymer chain that hosts it. This results in distinctive signatures in the vibrational ...
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Direct photon cross section with conversions at CDF
(2004)We present a measurement of the isolated direct photon cross section in p p̄ collisions at √s = 1.8 TeV and |η| T is poorly described by next-to-leading-order QCD predictions, but agrees with previous CDF measurements.
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Ferromagnetic and antiferromagnetic interactions in lanthanum cobalt oxide at low temperatures
(2001)Systematic dc and ac magnetic susceptibility studies have been performed on single-phase (formula presented) powder samples. Evidence is presented in support of the existence of ferromagnetic (FM1, FM2) and antiferromagnetic ...
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Fragment orbital based description of charge transfer in peptides including backbone orbitals
(2014)Charge transfer in peptides and proteins can occur on different pathways, depending on the energetic landscape as well as the coupling between the involved orbitals. Since details of the mechanism and pathways are difficult ...
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Measurement of the polar-angle distribution of leptons from W boson decay as a function of the W transverse momentum in pp̄ collisions at √s=1.8 TeV
(2004)We present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an 80±4 pb-1 sample of pp̄ collisions at √s = 1.8 TeV collected by ...
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Measurement of the tt̄ production cross section in pp̄ collisions at √s=1.8 TeV
(2001)We update the measurement of the tt̄ production cross section using the CDF detector at the Fermilab Tevatron. This measurement uses tt̄ decays to the final states e+v+jets and μ+v+jets. We search for b quarks from t decays ...
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Near critical behavior in the two-dimensional spin-gap system SrCu2(BO3)2
(2002)The temperature dependence of the powdered X-band ESR spectra has been measured in a two-dimensional spin-gap system SrCu2(BO3)2 in the temperature range between 5 and 300 K. The spectra are composed of two overlapping ...
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Physical constraints on charge transport through bacterial nanowires
(2012)Extracellular appendages of the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1 were recently shown to sustain currents of 10 10 electrons per second over distances of 0.5 microns [El-Naggar et al., Proc. ...
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Review: Probing protein electron transfer mechanisms from the molecular to the cellular length scales
(2013)The mechanisms of bridge-mediated electron transfer (ET) reactions vary from coherent deep tunneling to thermally activated hopping. This short review focuses on some developments in the study of protein ET mechanisms at ...
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Spectroscopic evidence for a pseudogap in the normal state of underdoped high-T(c) superconductors
(1996)It is well known that BCS mean-field theory is remarkably successful in describing conventional superconductors. A central concept of BCS theory is the energy gap in the electronic excitation spectrum below the superconducting ...
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Synthesis of fused 1,2,4-dithiazines and 1,2,3,5-trithiazepines
(2014)Reacting ( Z)-N-(4-chloro-5H-1,2,3-dithiazol-5-ylidene)-1H-pyrazol-5-amines 5 with Et2NH and then with concd H2SO4 gives 5H-pyrazolo[3,4-e ][1,2,4]dithiazine-3-carbonitriles 7 in good yields (74-85%) and 6H-pyrazolo-[3,4 ...
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Tests of enhanced leading order QCD in W boson plus jets events from 1.8 TeV p̄p collisions
(2001)We present a study of events with W bosons and hadronic jets produced in p̄p collisions at a center of mass energy of 1.8 TeV. The data consist of 51400 W → e ν decay candidates from 108 pb-1 of integrated luminosity ...
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Two-Electron Transfer Pathways
(2015)The frontiers of electron-transfer chemistry demand that we develop theoretical frameworks to describe the delivery of multiple electrons, atoms, and ions in molecular systems. When electrons move over long distances through ...
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Unpaired and spin-singlet paired states of a two-dimensional electron gas in a perpendicular magnetic field
(2002)We present a variational study of both unpaired and spin-singlet paired states induced in a two-dimensional electron gas at low density by a perpendicular magnetic field. It is based on an improved circular-cell approximation ...
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Vibrational control of electron-transfer reactions: A feasibility study for the fast coherent transfer regime
(2015)Molecular vibrations and electron-vibrational interactions are central to the control of biomolecular electron and energy-transfer rates. The vibrational control of molecular electron-transfer reactions by infrared pulses ...