Oklahoma State University

Departmental Publications have resulted in the following "Cover Art" in scientific journals.



Thermal analysis and FT-IR studies of adsorbed poly(ethylene-stat-vinyl acetate) on silica

Madhubhashini Maddumaarachchi and Frank D. Blum


Journal of Polymer Science Part B: Polymer Physics, 52, Issue 10, 727–736, 15 May 2014  DOI: 10.1002/polb.23476

Vinyl acetate groups arrange themselves to preferentially adsorb on a fumed silica surface over ethylene groups in poly(ethylene-stat-vinyl acetate) copolymers. Temperature-modulated differential scanning calorimetry and FTIR are used by Madhubhashini Maddumaarachchi and Frank D. Blum to show how glass transitions, melting, and hydrogen bonding vary with the composition and the adsorbed amount of the copolymer. The cover shows the preference of the vinyl acetate carbonyls (red) hydrogen bonded to the surface. When compared as a function of vinyl acetate groups alone, all copolymers and the homo-poly(vinyl acetate) behave similarly, except at low vinyl acetate contents, which can be considered carbonyl-starved



Direct conversion of a nanometric suspension of molybdenum trioxide into manometric lead molybdate


Cory K. Perkins, Kevin N. Barber and Allen W. Apblett

CrystEngComm, 2014, 16, 2869-2873 (issue 14)  DOI: 10.1039/C3CE42221F


Nanometric lead molybdate was prepared using lead nitrate and an aqueous suspension of nanoparticulate (190 nm) molybdenum trioxide and by varying the concentration of the reactants. At intermediate concentrations, less precipitate was formed in favor of formation of a stable suspension of nanoparticles (48 nm) that displayed a very strong Tyndall effect. At high dilution, particles that resembled German crosses were produced.



C60 Oxide as a Key Component of Aqueous C60 Colloidal Suspensions

Environ. Sci. Technol., 2012, 46 (14), pp 7446–7453  DOI: 10.1021/es2036652


Stable aqueous fullerene colloidal suspensions (nC60) are demonstrated to rely on the [6,6]-closed epoxide derivative of the fullerene (C60O) for stability. This derivative is present, though often unrecognized, in small quantities in nearly all C60 ...



Enantioselective Alkynylbenzaldehyde Cyclizations Catalyzed by Chiral Gold(I) Acyclic Diaminocarbene Complexes Containing Weak Au–Arene Interactions


Angewandte Chemie International Edition, 51, Issue 12, 2912–2915, 2012, March 19, 2012. DOI:10.1002/anie.201107789


Sachin Handa and LeGrande M. Slaughter


Creating an asymmetric environment at AuI is a challenge because of the linear coordination geometry of the ion.  S. Handa and L. M. Slaughter report the highly enantioselective catalysis of a tandem addition/cycloisomerization reaction of alkynylbenzaldehydes by chiral gold carbene complexes containing weak metal–π interactions. These secondary interactions help to create an asymmetric pocket around the gold atom that is analogous to a baseball glove gripping a ball. (Picture by L. M. Slaughter and S. Ball.)



Inhibition of Bacterial Dihydrofolate Reductase by 6-Alkyl-2,4-diaminopyrimidines

Baskar Nammalwar, Christina R. Bourne, Richard A. Bunce, Nancy Wakeham, Philip C. Bourne, Kal Ramnarayan, Shankari Mylvaganam, K. Darrell Berlin, Esther W. Barrow and William W. Barrow


ChemMedChem, 7, Issue 11, 1974–1982, November 2012 DOI:10.1002/cmdc.201200291


The inside cover picture shows a 6-alkyl-2,4-diaminopyrimidine inhibitor (magenta) with a propyl at the C6 position of the 2,4-diaminopyrimidine ring (asterisk) bound to S. aureus dihydrofolate reductase (blue model with surface shown, PDB: 4FGG). Binding triggers movement of a leucine side chain (yellow sticks), resulting in the opening of an adjacent hydrated pocket (filled with red spheres) contiguous with the binding pocket.



Fine-Tuning the Degree of Stem Cell Polarization and Alignment on Ordered Arrays of High-Aspect-Ratio Nanopillars

ACS Nano, 2012, 6 (7), pp 6222–6230. DOI:10.1021/nn301654e
Nanobiomaterials are introducing new capabilities to coordinate cell selection, growth, morphology, and differentiation. Herein, we report that tuning the geometry of ordered arrays of nanopillars (NP) elicits specialized morphologies in adherent cells. ...