Results 241 to 250 of about 1,202,674 (275)

Charge separation of triply charged ions

Rapid Communications in Mass Spectrometry, 1989
Abstract Formation of multiply charged ions is shown to contribute a significant fraction of the total ionization by high energy electrons, and multiple ionization is almost always followed by charge‐separation reactions.
D. A. Hagan, J. H. D. Eland
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Charge Patterns, Charge Separation

2017
Excess charge is found under equilibrium and non-equilibrium conditions, in different systems. Charge patterns are observed in material systems in any size range, from molecules to bulk matter. Positive and negative charge separation, partition and/or segregation is caused by many agents: solvents, large electric fields, radiation, mechanical forces ...
Fernando Galembeck, Thiago A. L. Burgo
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Photoinduced Charge Separation through a Negatively Charged Bridge

Inorganic Chemistry, 1998
A novel ruthenium polypyridyl dyad has been prepared. In this compound the electron donor phenothiazine is covalently bound to the Ru(bpy)2 center (bpy = 2,2‘-bipyridyl) through a negatively charge...
S. FANNI, T. E. KEYES, CAMPAGNA, Sebastiano, J. G. VOS   +3 more
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Entropic Changes Control the Charge Separation Process in Triads Mimicking Photosynthetic Charge Separation

The Journal of Physical Chemistry A, 2008
Laser-induced optoacoustic spectroscopy (LIOAS) measurements with carotene-porphyrin-acceptor "supermolecular" triads (C-P-A, with A = C60, a naphthoquinone NQ, and a naphthoquinone derivative, Q) were carried out with the purpose of analyzing the thermodynamic parameters for the formation and decay of the respective long-lived charge separated state C*
Alberto C, Rizzi, Maurice van, Gastel, Paul A, Liddell, Rodrigo E, Palacios, Gary F, Moore, Gerdenis, Kodis, Ana L, Moore, Tom A, Moore, Devens, Gust, Silvia E, Braslavsky   +9 more
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Phase separation, charge separation and biogenesis

Biosystems, 1981
The current view of bioenergetics postulates transmembrane charge separation as a primary mechanism of energy storage and transformation. Using that bioenergetic view we examine possible methods of photon driven transduction in primordial vesicles.
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Charge separation mass spectrometry

International Journal of Mass Spectrometry and Ion Processes, 1990
Abstract Charge separation following double ionization of organic methyl compounds has been studied using the photoelectron—photoion—photoion triple coincidence technique. Two- and three-body dissociation pathways are observed with intensities related to the thermochemical stability of the products and to their odd/even electron numbers.
E. Ruhl, S.D. Price, S. Leach, J.H.D. Eland   +3 more
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Photoinduced Charge Separation in Microemulsions

1992
Abstract Photoinduced charge separation was studied in a variety of microemulsions. The photosystem consisted of a porphyrin equipped with a hexadecyl chain, methylviologen as the electron acceptor and tributylamine as an irreversible electron donor. The cetyltrimethylammonium bromide (CTAB) based microemulsions were varied with respect to the alkyl ...
Verhaert, R.M.D., Roeterdink, F., Hilhorst, R., Schaafsma, T.J.   +3 more
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Photoinduced Charge-Separation in DNA

2014
DNA site-specifically modified with a photosensitizer (Sens) was synthesized and the charge-separation and charge-recombination dynamics in DNA were studied. We specifically focused on the formation of the long-lived charge-separated state whose lifetime (τ) is longer than 0.1 μs.
Kiyohiko, Kawai, Tetsuro, Majima
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Photoinduced Symmetry‐Breaking Charge Separation

ChemPhysChem, 2012
AbstractMolecular systems where several apparently equivalent charge separation pathways exist upon photoexcitation are presented. They encompass MQn (n≥2) architectures, where M is a chromophore and Q an electron transfer quencher (either donor or acceptor), and M–M systems where M acts as both electron donor and acceptor.
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Charge separation in liquids

The European Physical Journal B, 2004
The common theory of reversible charge transfer (RCT) at low donor system excitation power in liquids is examined. The space averaging procedures describing the kinetics of RCT in the liquid space are discussed. The reaction space is presented as a totality of independent subgroups with one excited donor and some group of acceptors effectively ...
M. S. Mikhelashvili, O. Agam
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