Materials Literature
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The new complexes 1,1‘-bis(5-(2,2‘-bithienyl))ferrocene ( 2 ) and 1,1‘-bis(5-(2,2‘:5‘,2‘ ‘-terthienyl))ferrocene ( 3 ) have been synthesized by coupling 1,1‘-bis(2-thienyl)ferrocene ( 1 ) with 2-bromothiophene and 5-bromo-2,2‘-bithiophene, respectively. The cyclic voltammograms of 1 − 3 contain a reversible Fe II/III…
We have examined the abilities of five structurally simple molecules to form thermoreversible gels with a variety of organic liquids. Each gelator is an acyclic alkane with one heteroatom. Of these, dioctadecylamine ( 2N ) is the most efficient gelator. At ≅3 wt % concentrations, it forms gels with alkanes, aromatic l…
Fourier transform infrared reflection absorption spectroscopy with the attenuated total reflection technique (ATR-FTIR), coupled with cyclic voltammetry (CV) measurement, is used to observe the oxidation process of adsorbed CO at Pt film sputtered on a silicon prism. The interesting bipolar shape of the linearly bonde…
The yield conditions for the gravitational displacement of three-dimensional fluid droplets from inclined solid surfaces are studied through a series of numerical computations. The study considers both sessile and pendant droplets and includes interfacial forces with constant surface tension. An extensive study is con…
Novel molecular electron donor−acceptor (DA) dyads, composed of a phytochlorin donor and a [60]fullerene acceptor, have been photochemically characterized. In these dyads, a pyrrolidine spacer group links the chlorin and the C 60 moieties covalently, forming a rigid dyad with a short and almost constant D−A distance.…
The synthesis of high-performance polymers requires a high level of control over the product9s morphology and hence its macroscopic properties. Kageyama et al . (page 2113) introduce a method that may make it easier to achieve such control over polymers made from simple starting materials. Nanoreactors within a mesopo…
In this paper, an organic−inorganic composite film of heteropolyanion was formed by attaching a Keggin-type heteropolyanion, SiW 12 O 40 4 -, on carbon electrode surface derivatized by 4-aminophenyl monolayer. The composite film thus grafted on carbon electrode surface has good stability because of the ionic bonding c…
The attachment of mesogens as end groups to hyperbranched polyglycerol (degree of polymerization 22-45; see schematic representation, the rigid mesogens are shown as rods and the flexible alkyl chains as lines) leads to liquid crystalline polymers with narrow polydispersity, whose liquid crystalline behavior is induce…
Nonlocal density functional theory (DFT) calculations were performed to analyze the di-σ, π, and atop chemisorption modes of maleic anhydride on the close-packed Pd(111), Re(0001), and pseudomorphic monolayers of Pd on Re(0001) [Pd ML /Re(0001)] and Pd on Mo(110) [Pd ML /Mo(110)] surfaces. The DFT-computed binding ene…
We present polarized two-photon excitation (TPE) spectra, including Zeeman data, for europium(III) in the elpasolites Cs 2 NaEuCl 6 and Cs 2 NaYF 6 :Eu 3+ . Approximately 80 and 60 levels of unambiguous symmetry have been assigned respectively in each compound up to 32 000 cm -1 with the aid of a one-electron crystal…
The effect of bulk viscosity on the evolution of the spatially flat Friedmann–Lemaitre–Robertson–Walker (FLRW) models in the context of open thermodynamical systems, which allow for particle creation, is analysed within the framework of Brans–Dicke (BD) theory. The BD field equations are modified with the incorporatio…
Malignant tumours often induce a fibroproliferative response in the adjacent stroma, characterized by increased expression of type I and type III procollagens. In normal tissues, fibrillar collagens normally undergo extensive intermolecular cross-linking that provides tensile strength to the tissue. Here we set out to…
The oxidative electron-transfer properties of several superphane complexes consisting of cyclopentadienylcobalt cyclobutadiene moieties linked by either three (compounds 1 and 4 ) or five (compounds 2 and 5 ) bridging methylene groups have been studied by experimental and theoretical methods. In both cases two separat…
While numerous fundamental studies have sought to elucidate the effect of a parent homopolymer on the morphological characteristics and mechanical properties of microphase-ordered block copolymer blends, few comparable efforts have extended such studies to concentrated copolymer solutions in the presence of a low-mola…
A single, amide-functionalized EDT-TTF core is expressed into markedly different and unprecedented stoichiometries and structures with contrasted collective electronic properties (uniform chain of spins versus two-dimensional metallic character) when associated with isosteric monoanions of different symmetries (Oh vs.…
Symmetry, dimensionality, and disorder play a pivotal role in critical phenomena. The atomic imaging capabilities of the scanning tunneling microscope were used to directly visualize the interaction between charge density oscillations and lattice defects in a two-dimensional charge density wave (CDW) system. Point def…
The Pt/TiO 2, Pt/ZrO 2, and Pt/Al 2 O 3 catalysts submitted to low-temperature reduction (LTR, 200 °C) and high-temperature reduction (HTR, 500 °C) and exposed to hydrogen and carbon monoxide at room temperature were studied by infrared spectroscopy. There is a strong loss of transmission in the entire infrared spectr…
The double-perovskite oxides Ca 2 FeMoO 6 , Sr 2 FeMoO 6 and Ba 2 FeMoO 6 show evidence of ferromagnetic metallic behaviour, with Curie temperatures of 345-426 K and saturation magnetization of 3.5-3.9 µ B /formula unit. Ceramics show little anisotropic magnetoresistance, but the low-field isotropic negative magnetore…
We present a brief analysis of the crossover phase diagram for the decay of a metastable phase in a simple dynamic lattice-gas model of a two-phase system. We illustrate the nucleation-theoretical analysis with dynamic Monte Carlo simulations of a kinetic Ising lattice gas on square and cubic lattices. We predict seve…
The dynamical mean-field theory together with the non-crossing approximation is used to set up a novel scheme to study the electronic structure of strongly correlated electron systems. The non-interacting band structure is obtained from a density functional calculation within the local density approximation. With this…