Deuterium NMR Studies

Badia, A., Demers, L., Guccia, L., Morin, E. and Lennox, R.B. (1997) Structure and Dynamics in Alkanethiolate Monolayers Self-Assembled on Gold Nanoparticles A DSC, ET-IR, and Deuterium NMR Study. Journal of the American Chemical Society, 119, 2682-2692. 

Hills, B.P. and Pardoe, K. 1995. Proton and deuterium NMR studies of the glass transition in a 10% water-maltose solution. J. Mol. Liquids 62, 229-237. 

It has been postulated on the basis of the crystal structure of [Mn (tpp)(02 )], that the peroxide ligand in Fe(III)-peroxo porphyrin species is coordinated in a side-on bidentate manner (Scheme 2) (8). Interestingly, based on the deuterium NMR studies the [Mn tppXOa )] complex was characterized as the Mn(II)-superoxo species (55). This discrepancy has been explained by an alteration of the normal d orbital ordering, where the highest energy d orbital is a d 2- -02 hybrid not the (8). These examples show that... 

Deuterium NMR studies of chain and headgroup deuterated phospholipid bilayers and phospholipid—cholesterol mixtures... 

R.P. Mason, J.K.M. Sanders, In wVo enzymology A deuterium NMR study of formaldehyde dismutase in Pseudomonas putida F61a and Staphylococcus aureus. Biochemistry 28 (1989) 2160-2168. 

A. G. Ludwick, L. W. Jelinski, D. Live, A. Kintanar and J. J. Dumais, Association of peptide chains during merrifield solid-phase peptide synthesis, a deuterium NMR study, J. Am. Chem. Soc., 1986, 108, 6493-6496. 

Abraham, W. (1995). Deuterium NMR study of structures formed by stratum comeum lipids in vitro. Proc. Intern. Symp. Control. Release Bioac. Mater. /9 135. 

Abraham, W. and Downing, D. T. (1992). Lamellar stmctures formed by stratum corneum lipids in vitro A deuterium NMR study. Pharm. Res. 9 1415. 

The specific questions to be addressed by solid state deuterium NMR studies of this polymer are the following (1) Are the motions of the CD2 groups in the segmented copolymer identical to the motions observed in the poly (butylene terephthalate) homopolymer (2) What effect do variations in the hard soft content ratio have on the motions of the CD2 groups And (3), is there evidence for hard segments which reside in the soft segment matrix If so, what per cent of them are in non-poly (butylene terephthalate)-like environments ... 

Whenever La-Hu transitions are observed thermotropically, the La phase is always the lower temperature phase. The fact that the Hu phase, which has two-dimensional symmetry, occurs at higher temperatures than the one-dimensional La phase indicates that the lattice entropy is not the dominant entropy contribution within the system. Instead, the dominant entropy sources are the large number of configurations available to the lipid hydrocarbon chains and (probably to a lesser extent) to the water. The shape of the mean molecular volume available to the lipid hydrocarbon chains changes dramatically at the transition, which suggests that the hydrocarbon entropy increases at the transition. This hypothesis is supported by recent deuterium NMR studies of the chain order parameter profile that indicate that the Hu chains are more disordered than the La chains (19, 20). 

Kintanar A Jelinski LW, Gancarz L Koberstein JT (1986) Complex molecular motion in bulk hard segment polsrurethanes A deuterium NMR study. Macromolecules, 19 1876... 

Che, T. M., Carney, R. V., Khanarian, G., Keosiuan, R. A., and Borzo, M., Electro-optical dc Kerr effects and solid-state deuterium NMR studies of stable gel-derived glass organic polymer composites, J. Non-Cryst. Solids, 102, 280-287 (1988). 

Le Lann, H. Odin, C. Toudic, B. Ameline, J.C. Gallier, J. Single-crystal deuterium NMR study of the symmetry breaking in an incommensurate organic inclusion compound. Phys. Rev. 2000, B62, 5442. 

Macintosh. M.R. Fraser, B. Gruwel, M.L.H. Wasylishen, R.E. Cameron, T.S. Deuterium NMR study of the adamantane-thiourea and bicyclo[2.2.2]octane-thiourea inclusion compounds. J. Phys. Chem. 899%.9d. 8572. 

Paik Y, Grey CP, Johnson CS, Kim J-S, Thackeray MM (2002) Lithium and deuterium NMR studies of acid-leached layered lithium manganese oxides. Chem Mater 14 5109-5115... 

Deuterium NMR Studies on Thermopiastic Eiastomers. For the investigation of the molecular dynamics in polymers, deuteron solid-state nuclear magnetic resonance ( D-NMR) spectroscopy has been shown to be a powerful method (2). In the field of viscoelastic polymers, segmental dynamics of poly(urethanes) has been studied intensively by D-NMR (131,132). In addition to ID NMR Spectoscopy, 2D NMR exchange spectroscopy was used to extend the time scale of molecular dynamics up to the order of milliseconds or even seconds. In combination with line-shape simulation, this technique allows one to obtain correlation times and correlation-time distributions of the molecular mobility as well as detailed information about the geometry of the motional process (2). 

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