Materials Literature
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Two new terbium complexes with aromatic carboxylic acids, [(Tb)2(L1)6(H2O)4] (1) and [(Tb)2(L2)6(H2O)2(DMF)2] (2) (HL1: nicotinic acid; HL2: 4-hydroxybenzoic acid), with different coordination geometries have been synthesized and their crystal structures determined. The luminescence properties of the two complexes, in…
The effects of malonic acid and the lithium, sodium, potassium, zinc, magnesium, calcium, strontium, and barium salts of malonic acid on the formation of β crystalline form in isotactic polypropylene at the crystallization temperatures 120 and 130°C have been investigated. It was found that malonic acid and the lithiu…
Two new ionic-pair salts containing an organic dye cation, i.e. New Fuchsin or Pararosaniline cation, with Keggin-type POMs, [SiW12O40]4− and [BW12O40]6−, have been isolated under hydrothermal conditions. [(C22H24N3)4][SiW12O40] (1) and [(C19H18N3)6][BW12O40] (2) have been characterized by elemental analyses, FT-IR an…
Paraelectric, pyrochlore thin films of Bi 1.5 Zn 1.0 Nb 1.5 O 7 were fabricated on platinized silicon and Ni‐plated Cu foil by aerosol deposition at room temperature for embedded capacitor applications. The highly dense films thus obtained showed superior dielectric properties without any heat treatment. The dielectri…
Transparent Ni2+-doped new La2O3-Ga2O3-Al2O3-SiO2 (LGAS) glass-ceramics (GC) embedding β-Ga2O3 nanocrystals was prepared. Upon excitation at 970 nm, an emission band at around 1200 nm was observed originating from the 3T2(3F)→3A2(3F) transition of Ni2+ in distorted octahedral sites. Effects of both heat-treated temper…
The correlation between the fast cage dynamics and structural relaxation is investigated in a model polymer system. It is shown that the cage vibration amplitude, as expressed by the Debye–Waller factor, and the relaxation time τα collapse on a single universal curve with a simple analytic form when the temperature, t…
W. Yamsaengsunga & N. Sombatsompopb a Polymer Processing and Flow Group, The Joint Graduate School of Energy and Environment , King Mongkut's University of Technology Thonburi, Thongkru, Bangmod , Bangkok, Thailand b Polymer Processing and Flow Group, School of Energy, Environment, and Materials , King Mongkut's Unive…
Abstract The electrodeposition of polypyrrole–phosphate (PPy–P) and polypyrrole–tungstenate (PPy–W) on mild steel (MS) were achieved in an oxalic acid medium with cyclic voltammetry techniques. Adherent and homogeneous PPy–P and PPy–W films were obtained. The corrosion behavior of mild steel with phosphate (PPy–P) and…
Nanocomposites based on polypropylene (PP) and multiwall carbon nanotubes (MWNT) have been prepared through melt blending. Scanning electron microscopy (SEM) observations indicate that nanotubes were dispersed almost homogeneously throughout the matrix; however, some aggregates were also observed at high nanotubes loa…
Recent experimental results indicate the possible realization of an even frequency $p$-wave triplet superconducting state in proximity affected ${\text{La}}_{0.65}{\text{Ca}}_{0.35}{\text{MnO}}_{3}\ensuremath{-}X(X=\text{Pb},{\text{MgB}}_{2})$ point contacts (PCs). Motivated by this we present a study of the current-v…
In this work, five yttria powders with slightly different states of agglomeration, inherited from various procedures of dewatering the same precursor, were densified by a combination of vacuum sintering followed by hot isostatic pressing (HIP). In order to relate the densification behavior of each powder to its state…
The synthesis, structure, and characterization of a [Yb(Tren-Me-3,2-HOPO)(H 2O) 2] complex are reported. As a result of its Yb (III) emission in the near-infrared region, sensitized by the Me-3,2-HOPO chromophore, this complex can be utilized for the first time to determine the hydration state, q, via the luminescence…
Abstract This study was performed with commercially available phenyl trimethoxysilane (PTMS) and neoalkoxytitanate [i.e., neopentyl(diallyl)oxytri(dioctyl)phosphato titanate (LICA 12)] as coupling agents. PTMS and LICA 12 were used to treat talc and kaolin to compare their effects with untreated fillers upon incorpora…
The reversal process of the chirality of each opposite vortex belonging to a double vortex state in ferromagnetic hysterons, via the application of in-plane magnetic fields, is reported. Simulations reveal that such a process involves the formation of four intermediate states, including original ones. Hysteresis loops…
Abstract A novel fluorescent ( p ‐phenylene ethynylene)‐calix[4]arene‐based polymer ( CALIX‐PPE ) has been successfully synthesized by cross‐coupling polymerization of bis‐calix[4]arene 1 with 1,4‐diethynylbenzene. The polycondensation was carried out in toluene/NEt 3 at 35 °C for 24 h, using PdCl 2 (PPh 3 ) 2 /CuI as…
Large-scale atomistic simulations considering a 5 nm in radius H-passivated Si nanosphere that impacts with relatively low energies onto a H-passivated Si substrate reveal a transition between two fundamental collision modes. At impacting speeds of less than $\ensuremath{\sim}1000\text{ }\text{m}/\text{s}$ particle-re…
Abstract Tellurites may be subdivided according to formula and structure. There are five groups based upon the formulae (a) A(XO 3 ), (b) A(XO 3 )·xH 2 O, (c) A 2 (XO 3 ) 3 · x H 2 O, (d) A 2 (X 2 O 5 ) and (e) A(X 3 O 8 ). Raman spectroscopy has been used to study the tellurite minerals teineite and graemite; both co…
A series of photochromic spirooxazine-containing zinc(II) diimine bis-thiolate complexes were successfully synthesized, and their photophysical and photochromic properties were studied. The X-ray crystal structure of complex 1a has also been determined. Upon excitation by UV light at 330 nm, all the ligands and comple…
Density functional theory calculations were carried out to study the charge transfer properties of bis(phthalocyaninato) yttrium and lanthanum double-decker complexes M(Pc) 2 (M = Y, La) for organic field effect transistors. The results indicate that the intrinsic delocalized hole in M(Pc) 2 (M = Y, La) induces the hi…
Oxomolybdenum(VI) complexes of 3,4-dihydroxybenzoic acid (3,4-H 2dhb) have been incorporated into layered double hydroxides (LDHs) by treatment of the LDH-nitrate (Zn-Al, Mg-Al) or LDH-chloride (Li-Al) precursors with aqueous or water/ethanol solutions of the complex (NMe 4) 2[MoO 2(3,4-dhb) 2].2H 2O at 50 or 100 degr…