Water Structure and Dynamics in Smectites: X-ray Diffraction and 2H NMR Spectroscopy of Mg–, Ca–, Sr–, Na–, Cs–, and Pb–Hectorite

2016 ◽  
Vol 120 (16) ◽  
pp. 8863-8876 ◽  
Author(s):  
U. Venkateswara Reddy ◽  
Geoffrey M. Bowers ◽  
Narasimhan Loganathan ◽  
Mark Bowden ◽  
A. Ozgur Yazaydin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Water Structure ◽  
2H Nmr ◽  
X Ray Diffraction ◽  
X Ray ◽  
2H Nmr Spectroscopy ◽  
Structure And Dynamics

Structural Characterization of Organometallic Sandwich Intercalates of Tin and Zirconium Dichalcogenides by X-ray and Neutron Diffraction and Solid State 2H NMR Spectroscopy

1994 ◽  
Vol 33 (24) ◽  
pp. 5515-5521 ◽  
Author(s):  
Heng-Vee Wong ◽  
John S. O. Evans ◽  
Stephen Barlow ◽  
Susan J. Mason ◽  
Dermot O'Hare
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Neutron Diffraction ◽  
Structural Characterization ◽  
2H Nmr ◽  
X Ray ◽  
2H Nmr Spectroscopy

scholarly journals Structure and dynamics of the aliphatic cholesterol side chain in membranes as studied by 2H NMR spectroscopy and molecular dynamics simulation

2016 ◽  
Vol 18 (5) ◽  
pp. 3730-3738 ◽  
Author(s):  
Alexander Vogel ◽  
Holger A. Scheidt ◽  
Dong Jae Baek ◽  
Robert Bittman ◽  
Daniel Huster
Keyword(s):  
Molecular Dynamics ◽  
Nmr Spectroscopy ◽  
Dynamics Simulation ◽  
Side Chain ◽  
Structural Flexibility ◽  
Large Contribution ◽  
2H Nmr ◽  
2H Nmr Spectroscopy ◽  
Structure And Dynamics ◽  
Condensation Effect

The cholesterol side chain has limited structural flexibility due to steric clashes explaining its large contribution to the condensation effect.

scholarly journals Influence of Strong Confinement on the Structure and Dynamics of Liquids: a Study of the Clay/Water Interface Exploiting 2H NMR Spectroscopy and Spin-Locking Relaxometry

2018 ◽  
Vol 122 (29) ◽  
pp. 16830-16841 ◽  
Author(s):  
Patrice Porion ◽  
Anne Marie Faugère ◽  
Anne-Laure Rollet ◽  
Emmanuelle Dubois ◽  
Virginie Marry ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
2H Nmr ◽  
Water Interface ◽  
2H Nmr Spectroscopy ◽  
Structure And Dynamics ◽  
Spin Locking ◽  
Strong Confinement

scholarly journals Phase Separation in Binary Mixtures of Bipolar and Monopolar Lipid Dispersions Revealed by Solid-State 2H NMR Spectroscopy and Small Angle X-ray Scattering

2009 ◽  
Vol 96 (3) ◽  
pp. 355a ◽  
Author(s):  
Andrey Struts ◽  
David P. Holland ◽  
Gabriel Longo ◽  
Matthew J. Justice ◽  
Igal Szleifer ◽  
...  
Keyword(s):  
Phase Separation ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Binary Mixtures ◽  
Small Angle ◽  
2H Nmr ◽  
X Ray ◽  
2H Nmr Spectroscopy ◽  
X Ray Scattering ◽  
Ray Scattering

Structure and dynamics of hexafluoroisopropanol-water mixtures by x-ray diffraction, small-angle neutron scattering, NMR spectroscopy, and mass spectrometry

2003 ◽  
Vol 119 (12) ◽  
pp. 6132-6142 ◽  
Author(s):  
Koji Yoshida ◽  
Toshio Yamaguchi ◽  
Tomohiro Adachi ◽  
Toshiya Otomo ◽  
Daisuke Matsuo ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Dynamics

scholarly journals Comparative 2H NMR and X-Ray Diffraction Investigation of a Bent-Core Liquid Crystal Showing a Nematic Phase

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 284
Author(s):  
Maria Ghilardi ◽  
Fabrizio C. Adamo ◽  
Francesco Vita ◽  
Oriano Francescangeli ◽  
Valentina Domenici
Keyword(s):  
Low Temperatures ◽  
Nematic Phase ◽  
Short Range ◽  
Orientational Order ◽  
Bend Angle ◽  
2H Nmr ◽  
X Ray Diffraction ◽  
Complementary Information ◽  
X Ray ◽  
2H Nmr Spectroscopy

Bent-core liquid crystals showing a nematic phase stable at low temperatures are very attractive for applicative purposes in view of the inherent biaxial nature of the nematic phase. In this work, a typical five-ring bent-core mesogen was investigated by means of 2H NMR spectroscopy and X-ray diffraction (XRD) methods. These techniques provide complementary information on the structural properties of the nematic phase and the average mesogen conformation: small-angle XRD reveals the presence of short-range positional order in the form of skewed cybotaxis, while a comparison of the orientational order parameters measured by wide-angle XRD and NMR provides an estimate of the molecule bend angle. In addition, 2H NMR puts in evidence the occurrence of an unexpected transition to a low-temperature tilted phase, having a crystalline or smectic-like character. The results were compared with those of previous 13C NMR investigations.

scholarly journals Phase Separation in Binary Mixtures of Bipolar and Monopolar Lipid Dispersions Revealed by 2H NMR Spectroscopy, Small Angle X-Ray Scattering, and Molecular Theory

2009 ◽  
Vol 97 (10) ◽  
pp. 2700-2709 ◽  
Author(s):  
David P. Brownholland ◽  
Gabriel S. Longo ◽  
Andrey V. Struts ◽  
Matthew J. Justice ◽  
Igal Szleifer ◽  
...  
Keyword(s):  
Phase Separation ◽  
Nmr Spectroscopy ◽  
Binary Mixtures ◽  
Small Angle ◽  
Molecular Theory ◽  
2H Nmr ◽  
X Ray ◽  
2H Nmr Spectroscopy ◽  
X Ray Scattering ◽  
Ray Scattering

An unusual reaction of a bridged triterpenoid α-diketone with acetic anhydride

1991 ◽  
Vol 56 (12) ◽  
pp. 2917-2935 ◽  
Author(s):  
Eva Klinotová ◽  
Václav Křeček ◽  
Jiří Klinot ◽  
Miloš Buděšínský ◽  
Jaroslav Podlaha ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Acetic Anhydride ◽  
Spectral Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mild Conditions ◽  
Condensation Products ◽  
Unsaturated Lactones ◽  
C Nmr

3β-Acetoxy-21,22-dioxo-18α,19βH-ursan-28,20β-olide (IIIa) reacts with acetic anhydride in pyridine under very mild conditions affording β-lactone IVa and γ-lactones Va and VIIa as condensation products. On reaction with pyridine, lactones Va and VIIa undergo elimination of acetic acid to give unsaturated lactones VIIIa and IXa, respectively. Similarly, the condensation of 20β,28-epoxy-21,22-dioxo-18α,19βH-ursan-3β-yl acetate (IIIb) with acetic anhydride leads to β-lactone IVb and γ-lactone Vb; the latter on heating with pyridine affords unsaturated lactone VIIIb and 21-methylene-22-ketone Xb. The structure of the obtained compounds was derived using spectral methods, particularly 1H and 13C NMR spectroscopy; structure of lactone IVa was confirmed by X-ray diffraction.

Unusual Rearrangement of Naphthalene in the Synthesis of a Novel B8-B8-Bridged Derivative in the [(1,2-C2B9H11)2-3-Co]- Series. X-Ray Structure and 11B NMR Spectra of [8,8'-μ-(CH2-C9H6)-(1,2-C2B9H10)2-3-Co]- (CH3)4N+

1997 ◽  
Vol 62 (5) ◽  
pp. 746-751 ◽  
Author(s):  
Andreas Franken ◽  
Jaromír Plešek ◽  
Christiane Nachtigal
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Nucleophilic Substitution ◽  
Nmr Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Unusual Rearrangement ◽  
Multinuclear Nmr Spectroscopy ◽  
11B Nmr ◽  
Isolated Compound

On treatment of the [(1,2-C2B9H11)2Co]- ion with naphthalene in presence of AlCl3 a remarkably bridged [8,8'-μ-(CH2-C9H6)-(1,2-C2B9H10)2-3-Co]- ion is obtained as a single isolated compound. The triatomic -CH2-C9H6- bridge is derived from the rearranged naphthalene nucleus. The mechanism of this reaction is obscure but it does resemble the "Electrophile-Induced Nucleophilic Substitution" reported earlier. The structure of the compound was established by multinuclear NMR spectroscopy and by single crystal X-ray diffraction.

Sign in / Sign up

Export Citation Format

Share Document