Materials Literature
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A new type of atomization interference, caused by traces of oxygen in gases supplied to the atomizer, has been identified in three different types of miniature flame hydride atomizer for atomic fluorescence spectrometry, namely argon–hydrogen diffusion flame (MDF), flame-in-gas shield (FIGS) and double flame (DF), whi…
Phasenänderungen erhellt: Die Absorption von Röntgenphotonen löst in dem gemischtvalenten Mn/Fe-Cyanid Rb0.7MnII1.15[FeIII(CN)6]⋅2 H2O über einen großen Temperaturbereich interne Charge-Transfer-Prozesse aus. Dabei treten kontinuierliche wie abrupte Phasenänderungen auf (siehe Schema; HS=high spin, LS=low spin). Da di…
Eine hellere Zukunft für Silole: Lumineszierende Silolchromophore mit den höchsten Quanteneffizienzen für vollständig substituierte monomere Silole entstehen durch Variation der sterischen Eigenschaften der Substituenten. Behandelt man die 1,1-Dimethylsilole bei Raumtemperatur mit Bu4NF (TBAF) in THF, werden sie schne…
Recently, the Istituto di Metrologia 'G Colonnetti' (IMGC) and the National Metrology Institute of Japan (NMIJ) reported joint measurements of the (220) lattice plane spacing of Si. These measurements were carried out at both the IMGC and the NMIJ to resolve a discrepancy between previous determinations. It has been f…
Single crystals of anhydrous dimercury(I) monofluorophosphate(V), Hg(2)PO(3)F (1), were obtained by cooling diluted aqueous Hg(2)(NO(3))(2) and (NH(4))(2)PO(3)F solutions from 85 degrees C to room temperature. Compound 1 crystallizes with eight formula units in the orthorhombic space group Ibam (No. 72) and lattice pa…
Abstract The structural changes of nitrile rubber in both the presence and the absence of polyfunctional monomers, such as trimethylolpropane triacrylate (TMPTA), tripropyleneglycol diacrylate (TPGDA), and trimethylolmethane tetraacrylate (TMMT), at different doses of electron beam irradiations, were investigated with…
Abstract With anionic waterborne polyurethane (WPU) as a plasticizer and ethylene glycol diglycidyl ether (EGDE) as a crosslinker, we successfully prepared crosslinked soy protein isolate (SPI) plastics. Anionic WPU was mixed with SPI and EGDE in an aqueous dispersion at room temperature. The mixed aqueous dispersion…
The anisotropy splitting in the ground state of the single-molecule magnet ${\mathrm{Mn}}_{4}{\mathrm{O}}_{3}\mathrm{Br}{(\mathrm{O}\mathrm{Ac})}_{3}{(\mathrm{dbm})}_{3}$ is studied by inelastic neutron scattering as a function of hydrostatic pressure. This allows a tuning of the anisotropy and thus the energy barrier…
Variable-temperature spectroscopic and crystallographic studies on the chromium(II) Tutton's salts, (MI)2Cr(X2O)6(SO4)2, where MI = ND4+, Rb+, or Cs+, and X = H or D, are reported. Inelastic neutron scattering (INS) and multifrequency EPR experiments facilitate a rigorous definition of the ground-state electronic stru…
We investigate a disordered single-walled carbon nanotube (SWCNT) in an effective-medium supercell approximation (EMSCA). The first type of disorder that we consider is the presence of vacancies. Our results show that the vacancies induce some bound states on their neighbor host sites, leading to the creation of a ban…
Inherent structures give insight into the structural changes that accompany the glass transition. Here, we present data on the energetics and configurations of inherent structures for various compositions in the NaCl−CsCl system, which are dominated by long-range ionic interactions. By choosing these compositions so a…
In general, matter is broadly divided info three groups, %lids, Liquids and Gases. When solid is heated it First melts into liquid and on further heating moves to gaseous state. Some materials exhibit interesting intermediate between solid and fiquid called liquid crystals. Liquid crystals (ICs) ore defined as •conden…
Modifizierung von Tetrathiafulvalen mit einem Imidazolylrest als H-Brücken-Donor ermöglicht die Bildung eines H-Brücken-gebundenen 2:1-Charge-Transfer-Komplexes mit Chloranil. Die Komponenten stapeln sich zu einem dreidimensionalen Netzwerk mit zahlreichen S⋅⋅⋅S-Wechselwirkungen (siehe Bild). Erstmals wurde hier metal…
Delta crystallin, a taxon-specific crystallin present in avian eye lenses, is homologous to the urea cycle enzyme ASL (argininosuccinate lyase). Although there are two delta crystallin isoforms in duck lenses, ddeltac1 (duck delta1 crystallin) and ddeltac2 (duck delta2 crystallin), only ddeltac2 is catalytically activ…
Tosylation of chitin under homogeneous conditions was achieved by the reaction of tosyl chloride with chitin in a DMAc/LiCl solvent system. The resultant tosyl-chitin was fully N-acetylated with acetic anhydride in methanol. The fully acetylated tosyl-chitin was subsequently reacted with the sodium salts of ethyl p-hy…
The electrochemical response of open/closed forms of 6-nitro-1‘,3‘,3‘-trimethylspiro[2 H -1-benzopyran-2,2‘-indoline] ( SP ) associated with zeolite Y ( SP@Y ) and MCM-41 silicates with or without framework Al ( SP@AlMCM and SP@MCM, respectively) is described upon immersion of zeolite-modified polymer film electrodes…
Abstract The solubility of nine aroma compounds (acetone, 2‐butanone, 2‐hexanone, 2‐octanone, ethyl acetate, ethyl butanoate, ethyl hexanoate, n ‐hexanal, and n ‐hexanol) in both water and various aqueous solutions was measured at 25 °C using the mutual solubility method. The aqueous solutions consisted of sucrose, gl…
Abstract In the framework of electricity production from molten carbonate fuel cells (MCFC), this work presents the results obtained from steady state process simulation, coupled with a detailed dynamic model for the cell. The derivation of the model is briefly outlined, and detailed results of the simulation are repo…
Abstract The viscosity of freshly prepared poly(vinyl chloride) (PVC) plastisol increases with time, and this phenomenon is called viscosity aging . The increase is rapid in the beginning and slows down to a quasistable value, but a very slow increase continues. The phenomenon may be a result of either the deagglomera…
Water-soluble ferrous porphyrin (Fe(II)TPPS) was prepared by complexation reaction of free base porphyrin (H2TPPS) with iron(II) ions in the presence of iron(III)-trapping acetate buffer; the catalytic and photoinduced properties of this air-stable complex proved unambiguously its sitting-atop structure.