Materials Literature
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Lanthanide coordination polymers of the general formula [Ln 2 (L) 5 (NO 3 )(H 2 O) 4 ] n (Ln = Eu ( 1 ), Tb ( 2 ), Gd ( 3 )) supported by a novel aromatic carboxylate ligand 4-((1H-benzo[d]imidazol-1-yl)methyl)benzoic acid (HL) have been synthesized, characterized, and their photoluminescence behavior is examined. The…
A new controlled release polymer micelle was designed and synthesized based on the concept of the "AND" logic with two orthogonal molecular triggers, namely pH and reduction, for intracellular drug delivery. Specifically, a hydrazine functionalized PEO-b-PMAA block copolymer was used to attach adriamycin (ADR) through…
In analogy to proteins, the function of RNA depends on its structure and dynamics, which are encoded in the linear sequence. While there are numerous methods for computational prediction of protein 3D structure from sequence, there have been very few such methods for RNA. This review discusses template-based and templ…
Chiral recognition of monosaccharide enantiomers is translated into large-extent wettability switching and other macroscopic surface properties, e.g., volume, on a smart copolymer film containing dipeptide units by a cooperative hydrogen-bonding interaction. This work points to a promising direction for developing nov…
Decalins bearing two axial -NHCONHAr substituents and an ester-linked alkyl side chain have been synthesized and studied as anion receptors and transporters. The design relates to steroid-based "cholapods" but is more compact and less intrinsically lipophilic. Transport rates depend on both NHAr and the alkyl side cha…
2-Methyl-5-nitraminotetrazole (1) was formed by nitration of 2-methyl-5-aminotetrazole. 2-Methyl-5-aminotetrazole was obtained by an improved synthesis starting from sodium 5-aminotetrazolate, which is methylated with dimethyl sulfate in dimethyl formamide giving 2-methyl-5-aminotetrazole in 29% yield. Nitrogen-rich s…
Sensitized mesoscopic solar cells can exhibit high performance and processability by the use of a thin semiconductor layer in combination with a sensitizer of superior light-harvesting ability. This combination is an important key toward the realization of high-efficiency flexible solar cells using solution-based, rap…
Two birds with one stone: Cooperative assembly of four-connected indium nodes with two symmetry-complementary ligands leads to both three-ring-based zeolite-type metal–organic frameworks (NPO-type) and the Johnson-type metal–organic polyhedra shown in the picture (gray C, green In, blue N, red O). The NPO-zeolite comp…
Fold and label: A critical challenge in nanoparticle (NP) surface functionalization is to label the NP surface with a single copy of a functional group or to display multiple, unique molecules on the NP surface with control of the orientation and intermolecular distance. This challenge was addressed with the construct…
A new low bandgap polymer POD2T-DTBT has been synthesized and found to give excellent performances in organic thin-film transistor (OTFT) and organic photovoltaic (OPV) applications. OTFTs based on POD2T-DTBT have achieved good hole carrier mobilities of 0.2 cm2V−1s−1 and OPVs based on blends of POD2T-DTBT and PC71BM…
Photo-induced reversibility as a tool for self-healing: a reversible photo-induced dendritic macromonomer was synthesized and proven to form networks with different features depending on the crosslinking conditions. While networks formed from aqueous systems exhibited a reversible change in their crosslinking degree,…
Abstract The dynamics of the polymer matrix in filled rubbers is modified by the presence of solid particles. We used low-field proton NMR to investigate model filled samples consisting of a dispersion of grafted silica particles into an elastomeric matrix. Exploiting magic-sandwich echo experiments, we were able to d…
Although the experimental study of spherical colloids has been extensive, similar studies on rodlike particles are rare because suitable model systems are scarcely available. To fulfill this need, we present the synthesis of monodisperse rodlike silica colloids with tunable dimensions. Rods were produced with diameter…
Single crystals of warwickite, trimagnesium titanium(IV) dioxide bis-(borate), Mg(3)TiO(2)(BO(3))(2), were prepared by slow cooling of the melt. The title compound is isotypic with Co(3)TiO(2)(BO(3))(2). In contrast to the previous refinement of warwickite [Moore & Araki (1974 ▶). Am. Mineral.59, 985-1004], that repor…
In this paper, wettability behavior of a rough but intrinsically hydrophilic oxide ceramic, formed via simple thermal oxidation of a commercial metallic alloy in laboratory air, has been analyzed. Drop shape analysis (DSA) revealed static water contact angles for the rough ceramic surfaces up to 128° (greater than for…
Manganese doped cadmium ferrites (Cd1-xMnxFe2O4, x=0, 0.25, 0.5, 0.75, 1) were studied by using ab initio calculation based on generalized gradient approximation (GGA). The dependence of electronic structure and magnetic properties on the additional on-site Coulomb repulsion (U) was investigated. In the calculation, n…
The field lines of energy flow of the radiation emitted by a linear dipole in free space are straight lines, running radially outward from the source. When the dipole is embedded in a medium, the field lines are curves when the imaginary part of the relative permittivity is finite. It is shown that due to the damping…
High-performance millimeter-wave absorber composed of ε-AlxFe2-xO3nanomagnets is prepared by sol-gel techniques. Free space quasi-optical spectrometer equipped with a set of tunable backward-wave oscillators as power sources is used in this work to study the absorption property of this series of materials. Special alu…
The surface potential variations on ZnO nanocrystal surfaces were investigated by using Kelvin probe force microscopy. It was found that the nanocrystal surface contains randomly distributed circular pits with a diameter of ∼100 nm and a depth of ∼30 nm and that the surface potential within the pits is lower than that…
Abstract The preparation of high‐Tg transparent polymers from poly(ether sulfone)s with bulky phosphinate pendants is described. Poly(ether sulfone)s P1–P3 based on biphenylene phosphinate‐substituted bisphenols were prepared. The thermal properties of P1 and P2 were studied and compared with a bisphenol‐A‐based poly(…