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Yu C, Bourrelly S, Martineau C, Saidi F, Bloch E, Lavrard H, Taulelle F, Horcajada P, Serre C, Llewellyn PL, Magnier E, Devic T. Functionalization of Zr-based MOFs with alkyl and perfluoroalkyl groups: the effect on the water sorption behavior. Dalton Trans 2015; 44:19687-92. [PMID: 26473182 DOI: 10.1039/c5dt02908b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stability and sorption of Metal-Organic Frameworks (MOFs) towards water are critical in many applications, and can a priori be modulated through the introduction of suitable organic functional groups on their backbone. We report here the preparation of a series of Zr(iv)-based MOFs functionalized with alkyl and perfluoroalkyl groups and their characterization by X-ray powder diffraction, multi-nuclei ((1)H, (13)C, (19)F) solid state nuclear magnetic resonance analyses, and nitrogen sorption measurements at 77 K. Their water sorption behavior was evaluated at 298 K and related to their physico-chemical features, highlighting both the effect of the confinement and the nature of the functional groups on the hydrophilic/hydrophobic balance.
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Affiliation(s)
- C Yu
- Institut Lavoisier, UMR CNRS 8180 Université de Versailles Saint-Quentin-en-Yvelines, 45 Av. des Etats-Unis, 78035 Versailles cedex, France
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Geier S, Fürst F, Ziegerer E, Kupfer T, Heber U, Irrgang A, Wang B, Liu Z, Han Z, Sesar B, Levitan D, Kotak R, Magnier E, Smith K, Burgett WS, Chambers K, Flewelling H, Kaiser N, Wainscoat R, Waters C. Stellar dynamics. The fastest unbound star in our Galaxy ejected by a thermonuclear supernova. Science 2015; 347:1126-8. [PMID: 25745168 DOI: 10.1126/science.1259063] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Hypervelocity stars (HVSs) travel with velocities so high that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US 708, HVS 2) is a compact helium star. Here we present a spectroscopic and kinematic analysis of US 708. Traveling with a velocity of ~1200 kilometers per second, it is the fastest unbound star in our Galaxy. In reconstructing its trajectory, the Galactic center becomes very unlikely as an origin, which is hardly consistent with the most favored ejection mechanism for the other HVSs. Furthermore, we detected that US 708 is a fast rotator. According to our binary evolution model, it was spun-up by tidal interaction in a close binary and is likely to be the ejected donor remnant of a thermonuclear supernova.
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Affiliation(s)
- S Geier
- European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching, Germany. Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstraße 7, 96049 Bamberg, Germany.
| | - F Fürst
- Space Radiation Lab, MC 290-17 Cahill, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
| | - E Ziegerer
- Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstraße 7, 96049 Bamberg, Germany
| | - T Kupfer
- Department of Astrophysics/Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, Netherlands
| | - U Heber
- Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstraße 7, 96049 Bamberg, Germany
| | - A Irrgang
- Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstraße 7, 96049 Bamberg, Germany
| | - B Wang
- Key Laboratory of the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
| | - Z Liu
- Key Laboratory of the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China. Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
| | - Z Han
- Key Laboratory of the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
| | - B Sesar
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA. Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
| | - D Levitan
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
| | - R Kotak
- Astrophysics Research Center, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
| | - E Magnier
- Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - K Smith
- Astrophysics Research Center, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
| | - W S Burgett
- Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - K Chambers
- Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
| | - H Flewelling
- Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
| | - N Kaiser
- Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
| | - R Wainscoat
- Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
| | - C Waters
- Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822, USA
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