Materials Literature
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The Protein Data Bank and Cambridge Structural Database were analyzed with the aim of verifying whether the restraints that are most commonly used for protein structure refinement are still appropriate 15 years after their introduction. From an analysis of selected main-chain parameters in well ordered fragments of te…
Self-assembled nanofibers of peptide-amphiphile molecules have been of great interest because of their bioactivity both in vitro and in vivo. In this work, we demonstrate the simultaneous self-assembly, alignment, and patterning of these nanofibers over large areas by a novel technique termed sonication-assisted solut…
The design, synthesis, and characterization of a novel dinuclear Eu(III) bismacrocyclic conjugate 1.Eu2 as a delayed luminescent lanthanide sensor for dicarboxylates is discussed. The sensor was shown to bind small dicarboxylic acids such as aspartic, malonic, succinic, or glutaric acid in pH 6.5 solutions. However, o…
This study focuses on the geometric (molecular) structures, spectroscopic properties, and electronic structures of copper(II)-nitrito complexes as a function of second coordination sphere effects using a set of closely related coligands. With anionic hydrotris(pyrazolyl)borate ligands, one nitrite is bound to copper(I…
The direct alkylation of 1,3-dicarbonyl compounds with benzylic alcohols is shown to be efficiently catalyzed by simple Brønsted acids such as triflic acid (TfOH) and p-toluenesulfonic acid (PTS) to give rise to monoalkylated dicarbonyl derivatives in high yields. In the absence of the nucleophile, substituted alkenes…
The temperature dependence of the optical conductivity spectrum of an itinerant ferromagnetic material, ZrZn$_2$, was obtained and the dynamical effective mass and the scattering rate were derived. A renormalized Drude peak with a heavy effective mass developed at low temperatures. The effective mass rapidly increased…
In the application of heterogeneous catalysts in liquid phase reactions, the rate of reaction as well as selectivity is often negatively influenced by mass transfer limitations in the stagnant liquid in the pores of the catalyst support. Internal mass transfer limitations can be reduced by maximizing the porosity and…
A strategy of rationally engineering protein surfaces with the aim of obtaining mutants that are distinctly more susceptible to crystallization than the wild-type protein has previously been suggested. The strategy relies on replacing small clusters of two to three surface residues characterized by high conformational…
We studied the influence of nanosteps on signal intensity in gap-mode tip-enhanced Raman spectroscopy (TERS). A benzenethiol monolayer adsorbed on an Au substrate was investigated. The correlation between the TERS signal and the local topography on the substrate shows that a 2 nm high sharp step on the Au surface can…
A universal metal−molecule−metal sandwich architecture by the self-assembly of Ag nanoparticles (NPs) and Au NPs of various shapes interconnected with 4-aminothiophenol (4-ATP) molecules was presented. These Ag NPs/4-ATP/Au NPs sandwich structures were characterized by surface enhanced Raman scattering (SERS) using an…
Binding of gold and silver clusters with amino acids (glycine and cysteine) was studied using density functional theory (DFT). Geometries of neutral, anionic, and cationic amino acids with Au3 and Ag3 clusters were optimized using the DFT-B3LYP approach. The mixed basis set used here was denoted by 6-31+G** (union or…
Covalent attachment of sulfonic acid-containing aryl radicals on the surface of ordered mesoporous carbon (CMK-5), leads to a solid acid catalyst with a high acid density. The material exhibits high surface area, uniform pore size distribution, high activity and good stability for acid-catalyzed reactions, such as est…
Polymer nanocomposites (PNCs), i.e. nanoparticles (spheres, rods, and plates) dispersed in a polymer matrix, have garnered substantial academic and industrial interest since their inception, ca. 1990. With respect to the neat matrix, nanoparticle dispersion has been shown to enhance physical (e.g., barrier, erosion re…
Epitaxial assembly involved in the formation of aggregates of single-crystalline barium titanate (BaTiO 3 ) nanoparticles under hydrothermal condition is reported. The aggregates of BaTiO 3 nanocrystals were synthesized by heating a mixture of barium hydroxide, Ba(OH) 2 , and titanium tetra-iso-propoxide, Ti(O i C 3 H…
A state-of-the-art study and a physical and numerical 3D finite element study of anisotropic conduction through composites filled with isometric inclusions of different conductivity were performed by modeling the longitudinal conduction across a tetragonal lattice of spheres in imperfect contact with the surrounding m…
Titanatrane, Mononuclear, Ring opening polymerization, Polylactide, PolycaprolactoneThe chemistry of atrane coordinated by the central nitro-gen atom as well as all three arms of deprotonated triethanol-amine ligand, imino-2,2',2''-triethanolate, has been inten-sively studied over the past few decades and its examples…
Abstract The enantioselective adsorption of racemic 1‐phenyl‐1,2‐ethanediol (PED) by carboxymethyl‐β‐cyclodextrin‐intercalated Zn–Al‐ layered double hydroxides (CMCD‐LDHs) has been studied. The adsorption isotherms of enantioselective as well as nonenantioselective adsorption of PED by CMCD‐LDHs have been investigated…
Control over the thickness of a silica coating on single-walled carbon nanotubes (SWNTs) is highly desirable for applications in optics and in biomedicine. Moreover, a silica coating on SWNTs would also aid in avoiding tube−tube contact and bundle formation as well as tube oxidation, a scenario conducive to the use of…
X-ray and NMR experiments were performed with simple chitosan models based on glucosamine monosaccharides and disaccharides to understand the binding properties and structures of the complexes formed between this polysaccharide and platinum(II) metals. Subjection of the glucosamine derivatives with [PdCl2(PhCN)2] prov…
Poly(L-lactic acid) (PLLA) is widely used in tissue-engineering applications because of its degradation characteristics and mechanical properties, but it possesses an inert nature, affecting cell-matrix interactions. It is desirable to modify the surface of PLLA to create biomimetic scaffolds that will enhance tissue…