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The gas-phase structure of 1-selena-closo-dodecaborane(11), 1-SeB11H11, determined by the concerted use of electron diffraction and computational methods.

Dalton transactions (Cambridge, England : 2003)

Hnyk D, Wann DA, Holub J, Bühl M, Robertson HE, Rankin DW.
PMID: 18399235
Dalton Trans. 2008 Jan 07;(1):96-100. doi: 10.1039/b714457a.

The molecular structure of 1-selena-closo-dodecaborane(11), 1-SeB11H11, has been determined by the concerted use of quantum chemical calculations and gas-phase electron diffraction. The structure has C(5v) symmetry and is distorted from a regular icosahedron mainly through the expansion of the...

Solar wind neon from Genesis: implications for the lunar noble gas record.

Science (New York, N.Y.)

Grimberg A, Baur H, Bochsler P, Bühler F, Burnett DS, Hays CC, Heber VS, Jurewicz AJ, Wieler R.
PMID: 17110575
Science. 2006 Nov 17;314(5802):1133-5. doi: 10.1126/science.1133568.

Lunar soils have been thought to contain two solar noble gas components with distinct isotopic composition. One has been identified as implanted solar wind, the other as higher-energy solar particles. The latter was puzzling because its relative amounts were...

4-Phenylbutan-2-one semicarbazone.

Acta crystallographica. Section C, Crystal structure communications

Degen A, Rühl S, Bolte M.
PMID: 15263194
Acta Crystallogr C. 2000 Apr 15;56:E162-3. doi: 10.1107/S0108270100003802. Epub 2000 Apr 15.

The title compound, C(11)H(15)N(3)O, crystallizes with two molecules in the asymmetric unit, which are held together by an extended network of hydrogen bonds. It is remarkable that only five of the six theoretically possible hydrogen bonds are formed.

Apollo 11 solar wind composition experiment: first results.

Science (New York, N.Y.)

Bühler F, Eberhardt P, Geiss J, Meister J, Signer P.
PMID: 17742848
Science. 1969 Dec 19;166(3912):1502-3. doi: 10.1126/science.166.3912.1502.

The helium-4 solar wind flux during the Apollo 11 lunar surface excursion was (6.3 +/- 1.2) x 10(6) atoms per square centimeter per second. The solar wind direction and energy are essentially not perturbed by the moon. Evidence for...

Charging mechanisms of trapped element-selectively excited nanoparticles exposed to soft x rays.

Physical review letters

Grimm M, Langer B, Schlemmer S, Lischke T, Becker U, Widdra W, Gerlich D, Flesch R, Rühl E.
PMID: 16606027
Phys Rev Lett. 2006 Feb 17;96(6):066801. doi: 10.1103/PhysRevLett.96.066801. Epub 2006 Feb 13.

Charging mechanisms of trapped, element-selectively excited free SiO2 nanoparticles by soft x rays are reported. The absolute charge state of the particles is measured and the electron emission probability is derived. Changes in electron emission processes as a function...

Molecular structures of arachno-decaborane derivatives 6,9-X2B8H10 (X = CH2, NH, Se) including a gas-phase electron-diffraction study of 6,9-C2B8H14.

Inorganic chemistry

Hnyk D, Bühl M, Holub J, Hayes SA, Wann DA, Mackie ID, Borisenko KB, Robertson HE, Rankin DW.
PMID: 16842008
Inorg Chem. 2006 Jul 24;45(15):6014-9. doi: 10.1021/ic060296v.

The molecular structures of the three heterodecaboranes arachno-6,9-C2B8H14, arachno-6,9-N2B8H12, and arachno-6,9-Se2B8H10 have been determined by ab initio MO theory. In addition, the structure of arachno-6,9-C2B8H14 was experimentally determined using gas-phase electron diffraction (GED). The accuracy of all four of...

Photoionization of small krypton clusters in the Kr 3d regime: evidence for site-specific photoemission.

The Journal of chemical physics

Hatsui T, Setoyama H, Kosugi N, Wassermann B, Bradeanu IL, Rühl E.
PMID: 16252945
J Chem Phys. 2005 Oct 15;123(15):154304. doi: 10.1063/1.2060709.

Kr 3d ionization energies of small, variable size krypton clusters are investigated by photoelectron spectroscopy, where the size regime of clusters with an average size N< or =30 is studied. Characteristic shifts in Kr 3d ionization energies to lower...

Bond strength of chlorine peroxide.

The journal of physical chemistry. A

Plenge J, Kühl S, Vogel B, Müller R, Stroh F, von Hobe M, Flesch R, Rühl E.
PMID: 16834026
J Phys Chem A. 2005 Aug 04;109(30):6730-4. doi: 10.1021/jp044142h.

The bond strength of chlorine peroxide (ClOOCl) is studied by photoionization mass spectrometry. The experimental results are obtained from the fragmentation threshold yielding ClO+, which is observed at 11.52 +/- 0.025 eV. The O-O bond strength D(o) is derived...

The presumption of innocence? A DFT-directed verdict on oxidized amavadin and vanadium catecholate complexes.

Inorganic chemistry

Geethalakshmi KR, Waller MP, Bühl M.
PMID: 18031034
Inorg Chem. 2007 Dec 24;46(26):11297-307. doi: 10.1021/ic701650y. Epub 2007 Nov 22.

51V NMR chemical shifts have been computed at the GIAO-B3LYP level for non-oxo vanadium(V) complexes related to oxidized amavadin, [Delta-VV{(S,S)-hidpa}2]- (H3hidpa = 2,2'-hydroxyiminodipropionic acid). According to model calculations, the unusual deshielding of the 51V resonance is due to a...

Quantitative Brain PET. Comparison of 2D and 3D Acquisitions on the GE Advance Scanner.

Clinical positron imaging : official journal of the Institute for Clinical P.E.T

Dhawan V, Kazumata K, Robeson W, Belakhlef A, Margouleff C, Chaly T, Nakamura T, Dahl R, Margouleff D, Eidelberg D.
PMID: 14516603
Clin Positron Imaging. 1998 Mar;1(2):135-144. doi: 10.1016/s1095-0397(98)00009-0.

PURPOSE: Recent developments in the design of positron emission tomography (PET) scanners have made three-dimensional (3D) data acquisition attractive because of significantly higher sensitivity compared to the conventional 2D mode (with lead/tungsten septa extended). However, the increased count rate...

Diffraction of neutral helium clusters: evidence for "magic numbers".

Physical review letters

Brühl R, Guardiola R, Kalinin A, Kornilov O, Navarro J, Savas T, Toennies JP.
PMID: 15169495
Phys Rev Lett. 2004 May 07;92(18):185301. doi: 10.1103/PhysRevLett.92.185301. Epub 2004 May 06.

The size distributions of neutral 4He clusters in cryogenic jet beams, analyzed by diffraction from a 100 nm period transmission grating, reveal magic numbers at N=10-11, 14, 22, 26-27, and 44 atoms. Whereas magic numbers in nuclei and clusters...

LOCALLY OPTIMAL TEST FOR HOMOGENEITY WITH RESPECT TO VERY RARE EVENTS.

Proceedings of the National Academy of Sciences of the United States of America

Bühler W, Fein H, Goldsmith D, Neyman J, Puri PS.
PMID: 16591306
Proc Natl Acad Sci U S A. 1965 Sep;54(3):673-80. doi: 10.1073/pnas.54.3.673.

No abstract available.

Showing 25 to 36 of 632 entries