Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
New polymer/inorganic hybrid materials have been prepared by a two-step soft chemistry route including the intercalation of aniline sulfonic acid between the sheets of a layered double hydroxide (LDH), Cu 2 Cr(OH) 6 Cl·nH 2 O, and its in situ polymerization at temperatures below 473 K in air atmosphere. A combination…
It is usually assumed that the Flory−Huggins interaction parameter χ in polymer blends can be represented by a structureless, pointlike interaction. On a local scale, however, the Flory−Huggins parameter must show a spatial dependence as it basically reflects the segment−segment interaction potential. We show that SAN…
Electronic absorption and magnetic circular dichroism (MCD) spectra of 2,3,6,7,11,12,17,18-octaethylcorrphycene, a constitutional isomer of porphyrin, were recorded for the neutral, doubly protonated, and doubly deprotonated forms. The spectra closely resemble those of the parent porphyrin and are quite different from…
The heteropoly compound [(V(V)O(4))Mo(VI)(12)O(36)(V(IV)O)(6)][(OH)(9)].11H(2)O (1), synthesized by hydrothermal method under weak basic conditions, represents the first mixed Mo/V six-capped Keggin structural derivative with a spherical skeleton, and the first transition metal polyoxocation. The successful synthesis…
Equilibrium contact angles are reported for silicone oils (poly(dimethylsiloxane)s) on polymer-coated and uncoated solid-silicon substrates immersed in aqueous electrolyte solutions. Solid-substrate wettability to water ranges from highly hydrophilic to highly hydrophobic based on water/air contact angles. Although si…
We have investigated the electronic structure of the commensurate charge-density-wave (CDW) phase for $1T\ensuremath{-}{\mathrm{TaSe}}_{2}$ by Ta $4f$ core-level and the angle-resolved photoemission. From the energy shifts of Ta $4f$ core levels due to a CDW formation, it is found that the CDW amplitude in the $1T\ens…
Herein we describe the preparation of intrinsically conducting poly(thiophene) via two different routes: solution- and solid-state cross-linking of terthiophene moieties. The solution-state cross-linking of terthiophene moieties was performed using conventional electrochemical polymerization in which insoluble cross-l…
The solvent viscosity effect on photochromic reaction processes such as cyclization and cycloreversion of a diarylethene derivative, 2-bis(2,4,5-trimethyl-3-thienyl)maleic anhydride (TMTMA), was investigated by means of steady-state spectroscopy, picosecond transient absorption, and fluorescence measurements. The cycl…
Starting from mesoporous V 2 O 5 containing a small amount of Mg, V 2 O 5 /PANI (polyaniline) nanocomposites with lamellar and wormlike structures and fibrous morphologies were synthesized. Mesoporous V 2 O 5 /Mg was first prepared at room temperature using a binary mixture of surfactants (cetyltrimethylammonium bromi…
The α -relaxation, involving local segmental motion, of poly(methyltolylsiloxane) (PMTS) was measured using dielectric spectroscopy, over a temperature range in excess of 100 deg at pressures up to 250 MPa. The data conformed to time−temperature−pressure superpositioning, although the T g -normalized temperature depen…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTAnisotropic Self-Aggregation of an Anthracene Derivative: Formation of Liquid-Crystalline Physical Gels in Oriented StatesTakashi Kato, Takaaki Kutsuna, Kazuhiro Yabuuchi, and Norihiro MizoshitaView Author Information Department of Chemistry and Biotechnology, School of Enginee…
The doping and temperature dependence of the complex conductivity is determined for the ferromagnetic semiconductor Ga(1-x)Mn(x)As. A broad resonance develops with Mn doping at an energy scale of approximately 200 meV, well within the GaAs band gap. Possible origins of this feature are explored in the context of a Mn…
The hydrothermal reaction of 3-aminopropyltriethoxysilane (APTES) and nickel acetate tetrahydrate at 170 °C results in a layered nickel silicate, Ni 3 Si(C 3 H 6 NH 3 )F 0.65 O 1.9 (OH) 4.45 (CH 3 COO) 1.1 · x H 2 O, x = 0.38, with an interlayer spacing of 21 Å. The molecular structure is deduced from powder X-ray dif…
Adherent and uniform films of zinc sulfide have been deposited reproducibly by chemical bath deposition (CBD), onto low iron content microscope slides, under acidic conditions from solutions containing zinc(II) chloride, urea and thioacetamide. In situ measurements using a quartz crystal microbalance suggest that film…
High loading, three-dimensionally ordered macroporous (3DOM) hybrid silica materials based on monovacant Keggin-type polyoxometalates (POMs) [Xn+W11O39](12 − n)− (XW11; Xn+ = P5+, Si4+, Ge4+, B3+) were prepared via sol–gel as well as templating techniques. XW11 clusters were incorporated into the wall structures of ma…
Well-aligned ZnO nanorods have been grown on Si (100) substrates using a simple, catalyst-free CVD method at low temperatures. Structural analyses show that the nanorods grown on Si (100) are preferentially oriented in the c-axis direction. An amorphous SiOx layer in the interface of ZnO nanorods and Si (100) is obser…
A facile and selective route based on a precipitate slow-release controlled process was developed to produce both high-quality MnSe 2 and α-MnSe uniform microcrystals in aqueous solution at low temperatures (100−180 °C). The magnetic properties of the two samples were investigated in detail. This synthetic method will…
The nature of magnetic orbitals is analyzed on a series of five Cu(d 9 )···Cu(d 9 ) complexes, comparing various theoretical approaches. The magnetic orbitals are usually defined from ab initio mean-field calculations. It is shown that they are practically identical for the lower and upper multiplets. Diagonalization…
Herein we report the synthesis and electrochemical characterization of poly(thieno[3,4- b ]thiophene), a new low band gap conducting polymer with a high redox switching stability that exhibits high optical transparency in the semiconductive state. The monomer, thieno[3,4- b ]thiophene (T34bT), has a low oxidation pote…
We propose that the shape of the equilibrium $T\ensuremath{-}P$ phase diagram of a liquid is strongly correlated with the thermodynamic anomalies and the ease of vitrification. The $T\ensuremath{-}P$ phase diagram of water is characterized by its V shape. By using this specific shape of the phase diagram as a fingerpr…