Todd M. Alam

Sandia National Laboratories

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Timothy J. Boyle

Sandia National Laboratories

126

T.J. Boyle

M.A. Rodriguez

Universidad de la República

Mark A. Rodriguez

Sandia National Laboratories

Sarah McIntyre

Linköping University

T.J. Boyle

Sandia National Laboratories

L.A.M. Ottley

Sandia National Laboratories

May Nyman

Oregon State University

Jeremiah M. Sears

Sandia National Laboratories

M.A. Rodriguez

Sandia National Laboratories

Cooperative Institutions

Sandia National Laboratories

311

Sandia National Laboratories California

259

University of New Mexico

109

National Technical Information Service

Office of Scientific and Technical Information

Los Alamos National Laboratory

Center for Integrated Nanotechnologies

Radiology Associates of Albuquerque

Argonne National Laboratory

Iowa State University

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Tetrahydrofurfuryloxide derivatives of alkyl aluminum species.

Timothy J. Boyle G.R. Avilucea S.D. Bunge Todd M. Alam Mark A. Rodriguez

Tetrahydrofurfuryl alcohol (H-OTHF) was successfully reacted with a series of aluminum alkyls (AlR{sub 3}) to yield compounds of the general formula [R{sub 2}Al({mu}-OTHF)]{sub 2} where R = CH{sub 3} (1), CH{sub 2}CH{sub 3} (2), and CH{sub 2}CH(CH{sub 3}){sub 2} (3). Further, reactivity studies showed that the alkyls for 1 were easily exchanged, forming compounds of the general formula [Me(OR)Al({mu}-OTHF)]{sub 2} where OR = OC{sub 6}H{sub 3}(Me){sub 2}-2,6 (4), OC{sub 6}H{sub 3}(CMe{sub 3}){sub 2}-2,6 (5a), and OSi(C{sub 6}H5){sub 3} (6). For 5a, reflux temperatures were required to get the full exchange; otherwise the asymmetric derivative [Me(OR)Al({mu}-OTHF){sub 2}AlMe{sub 2}] (5b) was isolated. The bulk powders of 1-6 were found to be in agreement with the crystal structures on the basis of elemental analyses and multinuclear solid state NMR studies. Multinuclear solution state NMR studies indicate that the alkyl OTHF derivatives have cis/trans isomers due to the chiral proton on the OTHF ligand.

Reactivity

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Characterizing PDMS degradation films produced on metal surfaces

Todd M. Alam

Degradation

10.1021/scimeetings.0c02479

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1H NMR Detection of superparamagnetic nanoparticles at 1T using a microcoil and novel tuning circuit

Journal of Magnetic Resonance (2006)

Laurel O. Sillerud Andrew F. McDowell Natalie L. Adolphi Rita E. Serda David P. Adams

Microcoil

Superparamagnetism

Proton NMR

10.1016/j.jmr.2006.04.005

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Citations (65)

Investigation of Sodium Distribution in Phosphate Glasses Using Spin−Echo ²³Na NMR

The Journal of Physical Chemistry B (2000)

Todd M. Alam Jay P. McLaughlin Carol C. Click Sam Conzone Richard K. Brow

The spatial arrangements of sodium cations for a series of sodium phosphate glasses, xNa2O·(100-x)P2O5 (x ≤ 55), were investigated using 23Na spin−echo NMR spectroscopy. The spin−echo decay rate is a function of the Na−Na homonuclear dipolar coupling, and is related to the spatial proximity of neighboring Na nuclei. The spin−echo decay rate in these sodium phosphate glasses increases nonlinearly with higher sodium number density, and thus provides a measure of the Na−Na extended range order. The results of these 23Na NMR experiments are discussed within the context of several structural models, including a decimated crystal lattice model, cubic dilation lattice model, a hard sphere (HS) random distribution model, and a pairwise cluster hard sphere model. While the experimental 23Na spin−echo M2 are described adequately by both the decimated lattice and the random HS models, it is demonstrated that the slight nonlinear behavior of M2 as a function of sodium number density is more correctly described by the random distribution in the HS model. At low sodium number densities the experimental M2 is inconsistent with models incorporating Na−Na clustering. The ability to distinguish between Na−Na clusters and nonclustered distributions becomes more difficult at higher sodium concentrations.

Homonuclear molecule

Isotopes of sodium

10.1021/jp9931509

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CCDC 153310: Experimental Crystal Structure Determination

The Cambridge Structural Database (2001)

T.J. Boyle Dawn Pedrotty Todd M. Alam S.C. Vick M.A. Rodriguez

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cc54jh9

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CCDC 153314: Experimental Crystal Structure Determination

The Cambridge Structural Database (2001)

T.J. Boyle Dawn Pedrotty Todd M. Alam S.C. Vick M.A. Rodriguez

10.5517/cc54jmf

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CCDC 153318: Experimental Crystal Structure Determination

The Cambridge Structural Database (2001)

T.J. Boyle Dawn Pedrotty Todd M. Alam S.C. Vick M.A. Rodriguez

10.5517/cc54jrk

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ChemInform Abstract: Ion‐Exchange Behavior of One‐Dimensional Linked Dodecaniobate Keggin Ion Materials.

ChemInform (2008)

May Nyman Craig R. Powers Franc̊ois Bonhomme Todd M. Alam Edward J. Maginn

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

10.1002/chin.200828213

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Investigation of cation environment and framework changes in silicotitanate exchange materials using solid-state 23Na, 29Si, and 133Cs MAS NMR

Journal of Solid State Chemistry (2004)

Brian R. Cherry May Nyman Todd M. Alam

Magic angle spinning

Caesium

10.1016/j.jssc.2004.02.020

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Citations (45)

Unexpected effects of inorganic phosphate glass on crystallization and thermo-rheological behavior of polyethylene terephthalate