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Observation of the transition state for pressure-induced BO3[arrow right] BO4 conversion in glass

Laboratory glassware and kitchen cookware alike are made of glass that contains different cations, including boron, sodium, and aluminum. Properties of glass depend on the number and location of oxygen atoms surrounding each cation. Edwards et al. combine nuclear magnetic resonance measurements with... Full description

Journal Title: Science Aug 29, 2014, Vol.345(6200), pp.1027-1029
Main Author: Edwards, Trenton
Other Authors: Endo, Takatsugu , Walton, Jeffrey , Sen, Sabyasachi
Format: Electronic Article Electronic Article
Language: English
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ID: ISSN: 00368075 ; E-ISSN: 10959203 ; DOI: 10.1126/science.1256224
Link: http://search.proquest.com/docview/1558071506/?pq-origsite=primo
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title: Observation of the transition state for pressure-induced BO3[arrow right] BO4 conversion in glass
format: Article
creator:
  • Edwards, Trenton
  • Endo, Takatsugu
  • Walton, Jeffrey
  • Sen, Sabyasachi
subjects:
  • Glass
  • Pressure
  • Nuclear Magnetic Resonance–NMR
  • Crystal Structure
  • Materials Science
ispartof: Science, Aug 29, 2014, Vol.345(6200), pp.1027-1029
description: Laboratory glassware and kitchen cookware alike are made of glass that contains different cations, including boron, sodium, and aluminum. Properties of glass depend on the number and location of oxygen atoms surrounding each cation. Edwards et al. combine nuclear magnetic resonance measurements with theoretical calculations to understand structural transformations in borosilicate glass (see the Perspective by Youngman). Boron atoms in planar threefold coordination move out of plane with increasing pressure to form trigonal pyramids. Identification of this type of transition state connects structural evolution with stress-induced processes in amorphous materials. In borosilicate glass, the transition leads to the formation of tetrahedral fourfold-coordinated boron that tunes glass properties for use in numerous applications.; Science, this issue p. 1027; see also p. 998 [PUBLICATION ] A fundamental mechanistic understanding of the pressure- and/or temperature-induced facile transformation of the coordination environment of boron is important for changing the physical properties of glass. We have used in situ high-pressure (up to 2 gigapascals) boron-11 solid-state nuclear magnetic resonance spectroscopy in combination with ab initio calculations to investigate the nature of the transition state for the pressure-induced BO3[arrow right] BO4 conversion in a borosilicate glass at ambient temperature. The results indicate an anisotropic elastic deformation of the BO3 planar triangle, under isotropic stress, into a trigonal pyramid that likely serves as a precursor for the subsequent formation of a BO4 tetrahedron. [PUBLICATION ]
language: eng
source:
identifier: ISSN: 00368075 ; E-ISSN: 10959203 ; DOI: 10.1126/science.1256224
fulltext: fulltext
issn:
  • 00368075
  • 0036-8075
  • 10959203
  • 1095-9203
url: Link


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titleObservation of the transition state for pressure-induced BO3[arrow right] BO4 conversion in glass
creatorEdwards, Trenton ; Endo, Takatsugu ; Walton, Jeffrey ; Sen, Sabyasachi
ispartofScience, Aug 29, 2014, Vol.345(6200), pp.1027-1029
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subjectGlass ; Pressure ; Nuclear Magnetic Resonance–NMR ; Crystal Structure ; Materials Science
descriptionLaboratory glassware and kitchen cookware alike are made of glass that contains different cations, including boron, sodium, and aluminum. Properties of glass depend on the number and location of oxygen atoms surrounding each cation. Edwards et al. combine nuclear magnetic resonance measurements with theoretical calculations to understand structural transformations in borosilicate glass (see the Perspective by Youngman). Boron atoms in planar threefold coordination move out of plane with increasing pressure to form trigonal pyramids. Identification of this type of transition state connects structural evolution with stress-induced processes in amorphous materials. In borosilicate glass, the transition leads to the formation of tetrahedral fourfold-coordinated boron that tunes glass properties for use in numerous applications.; Science, this issue p. 1027; see also p. 998 [PUBLICATION ] A fundamental mechanistic understanding of the pressure- and/or temperature-induced facile transformation of the coordination environment of boron is important for changing the physical properties of glass. We have used in situ high-pressure (up to 2 gigapascals) boron-11 solid-state nuclear magnetic resonance spectroscopy in combination with ab initio calculations to investigate the nature of the transition state for the pressure-induced BO3[arrow right] BO4 conversion in a borosilicate glass at ambient temperature. The results indicate an anisotropic elastic deformation of the BO3 planar triangle, under isotropic stress, into a trigonal pyramid that likely serves as a precursor for the subsequent formation of a BO4 tetrahedron. [PUBLICATION ]
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titleObservation of the transition state for pressure-induced BO3[arrow right] BO4 conversion in glass
descriptionLaboratory glassware and kitchen cookware alike are made of glass that contains different cations, including boron, sodium, and aluminum. Properties of glass depend on the number and location of oxygen atoms surrounding each cation. Edwards et al. combine nuclear magnetic resonance measurements with theoretical calculations to understand structural transformations in borosilicate glass (see the Perspective by Youngman). Boron atoms in planar threefold coordination move out of plane with increasing pressure to form trigonal pyramids. Identification of this type of transition state connects structural evolution with stress-induced processes in amorphous materials. In borosilicate glass, the transition leads to the formation of tetrahedral fourfold-coordinated boron that tunes glass properties for use in numerous applications.; Science, this issue p. 1027; see also p. 998 [PUBLICATION ] A fundamental mechanistic understanding of the pressure- and/or temperature-induced facile transformation of the coordination environment of boron is important for changing the physical properties of glass. We have used in situ high-pressure (up to 2 gigapascals) boron-11 solid-state nuclear magnetic resonance spectroscopy in combination with ab initio calculations to investigate the nature of the transition state for the pressure-induced BO3[arrow right] BO4 conversion in a borosilicate glass at ambient temperature. The results indicate an anisotropic elastic deformation of the BO3 planar triangle, under isotropic stress, into a trigonal pyramid that likely serves as a precursor for the subsequent formation of a BO4 tetrahedron. [PUBLICATION ]
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titleObservation of the transition state for pressure-induced BO3[arrow right] BO4 conversion in glass
authorEdwards, Trenton ; Endo, Takatsugu ; Walton, Jeffrey ; Sen, Sabyasachi
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abstractLaboratory glassware and kitchen cookware alike are made of glass that contains different cations, including boron, sodium, and aluminum. Properties of glass depend on the number and location of oxygen atoms surrounding each cation. Edwards et al. combine nuclear magnetic resonance measurements with theoretical calculations to understand structural transformations in borosilicate glass (see the Perspective by Youngman). Boron atoms in planar threefold coordination move out of plane with increasing pressure to form trigonal pyramids. Identification of this type of transition state connects structural evolution with stress-induced processes in amorphous materials. In borosilicate glass, the transition leads to the formation of tetrahedral fourfold-coordinated boron that tunes glass properties for use in numerous applications.; Science, this issue p. 1027; see also p. 998 [PUBLICATION ABSTRACT] A fundamental mechanistic understanding of the pressure- and/or temperature-induced facile transformation of the coordination environment of boron is important for changing the physical properties of glass. We have used in situ high-pressure (up to 2 gigapascals) boron-11 solid-state nuclear magnetic resonance spectroscopy in combination with ab initio calculations to investigate the nature of the transition state for the pressure-induced BO3[arrow right] BO4 conversion in a borosilicate glass at ambient temperature. The results indicate an anisotropic elastic deformation of the BO3 planar triangle, under isotropic stress, into a trigonal pyramid that likely serves as a precursor for the subsequent formation of a BO4 tetrahedron. [PUBLICATION ABSTRACT]
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pubThe American Association for the Advancement of Science
doi10.1126/science.1256224
urlhttp://search.proquest.com/docview/1558071506/
date2014-08-29