Materials Literature
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APRV (Automatic Processing, Refinement and Visualization) is a new program that enables high-throughput batch processing of crystallographic data. The program combines processing of raw diffraction images, initial structure refinement and visual inspection of resulting electron density into a seamless one-step procedu…
The crystal structure of serine acetyltransferase (SAT) from Haemophilus influenzae Rd determined at 2.7 A resolution is presented. SAT is a member of a family of hexapeptide-containing transferases that contain six-residue tandem repeats (LIV)-G-X(4) that have been shown to form left-handed parallel beta-helices. In…
A topic of current interest is engineering surface mutations in order to improve the success rate of protein crystallization. This report explores the possibility of using metal-ion-mediated crystal-packing interactions to facilitate rational design. Escherichia coli apo acyl carrier protein was chosen as a test case…
The metal NMR parameters of the complexes [(NC)(5)Pt-Tl(CN)(n)](n -) (n = 0-3, I-IV) and [(NC)(5)Pt-Tl-Pt(CN)(5)](3-) (V), as well as [{Pt(NO(3))(NH(3))(2)L(2)}Tl(NO(3))(2)(MeOH)] (VI) and [{Pt(NO(3))(NH(3))(2)L(2)}(2)Tl](+) (VII) with L = NHCO(t)Bu, were computationally investigated by relativistic density functional…
Rasvumite, KFe 2 S 3 , belongs to a group of rare iron bearing alkali sulphide minerals together with erdite, bartonite, djerfisherite and others occurring in mafic alkaline rocks on the Kola peninsula (Russia) or Coyote Peak in California (USA) [1]. KFe 2 S 3 has been synthesized hydrothermally in microcrystalline ap…
The shadowing of the primary beam and of reflections from a powder crystal sample enclosed in a diamond-anvil high-pressure cell (DAC) is described for unrestricted data-collection procedures. The corrections account for the shadowing of the data measured with point- or area-detector diffractometers and can be applied…
Abstract PA1010/TPU blends were prepared by melt blending. The melting, crystallization behavior, and isothermal crystallization kinetics were investigated using differential scanning calorimetry (DSC). The results showed that the DSC thermograms of blend samples exhibit double melting peaks. With increasing the TPU c…
Carbon nanotubes were synthesized in an atmospheric chamber by irradiating a metal-catalyst containing graphite target with a 2 kW continuous wave CO2 laser and capturing the soot in flowing distilled water to facilitate continuous, rapid production. The ablation products, swept away by an argon flow and collected in…
J. ZEKONYTE, V. ZAPOROJTCHENKO, S. WILLE, U. SCHUERMANN and F. FAUPEL* Technical Faculty, Chair for Multicomponent Materials, Kiel University, Kaiserstrasse 2, 24143 Kiel, Germany 1. INTRODUCTION The metallization of polymers with noble metals has been of interest in recent years, not only from a fundamental point of…
Abstract The effect of nanomaterials on the solid‐state polycondensation (SSP) of PET was investigated using intrinsic viscosity measurement, wide‐angle X‐ray diffraction, differential scanning calorimetry, and polarizing microscope. The results showed that the montmorillonite nanomaterials could greatly increase the…
The nuclear shielding of (99)Ru in a wide variety of complexes was investigated computationally by DFT methods, including relativistic effects (by means of the Pauli and ZORA approximations), up to spin-orbit coupling and Slater all-electron or frozen-core basis sets. Mononuclear complexes, a trinuclear cluster and a…
Abstract The room‐temperature solid‐state reaction of silver acetate with TabHPF 6 [Tab = 4‐(trimethylammonio)benzenethiolate] followed by recrystallization from MeCN afforded a unique octadecanuclear silver thiolate complex [Ag 9 (Tab) 8 (MeCN) 8 ] 2 (PF 6 ) 18 ·4MeCN ( 1 ). An X‐ray analysis of 1 revealed that the s…
A series of two dimensional close-packed $\mathrm{Co}$, $\mathrm{NiFe}$, and $\mathrm{CoFe}∕\mathrm{Cu}∕\mathrm{NiFe}$ magnetic particle arrays, in which the particles have mean diameters of $34\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, thicknesses of $5--20\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, and periodicity of $56…
Common urethane acrylate oligomers can be synthesized by one of two modes of addition. A polyol can be terminated on each end with diisocyanate and then capped with a hydroxy functional acrylate, direct addition, or a diisocyanate can first be reacted with a hydroxy functional acrylate, and that product can be used to…
Abstract Photoluminescent properties of the terbium tris(acetylacetonate)tetrahydrated [Tb(acac) 3 (H 2 O) 4 ], doped in the epoxy resin, in the solid state are reported. The polymeric Tb 3+ system and the precursor terbium complex were characterized by elemental analysis, thermogravimetry, differential scanning calor…
Electronic and magnetic structures of $A$-site ordered perovskite-type manganites, $\mathit{Ln}\mathrm{Ba}{\mathrm{Mn}}_{2}{\mathrm{O}}_{6}$ ($\mathit{Ln}=\mathrm{Sm}$ and Nd), located close to the multicritical point of the competing phases, have been investigated by measurements of resonant x-ray scattering, optical…
The ideal tensile strengths of the $\mathrm{B}2$-type $(\mathrm{CsCl})$ transition-metal aluminides $\mathrm{FeAl}$, $\mathrm{CoAl}$, and $\mathrm{NiAl}$ have been investigated using an ab initio electronic structure total energy method. The three materials exhibit dissimilar mechanical behaviors under the simulated i…
Abstract Summary: Soluble multi‐walled carbon nanotubes ( s ‐MWNTs), obtained via amidation reaction of octadecylamine with purified multi‐walled carbon nanotubes ( p ‐MWNTs), were solution‐mixed with P(MMA‐ co ‐EMA) at various loadings. Compared to the p ‐MWNTs/P(MMA‐ co ‐EMA) composites, the s ‐MWNTs/P(MMA‐ co ‐EMA)…
New dimeric cholesterol-based viologen derivative 1 has been prepared and can form a very stable supergel in 1-butanol. To characterize the aggregation mode of 1 in the organogel phase, transmission electron microscopy (TEM) images, small-angle X-ray diffraction (SAXRD) patterns, and circular dichroism (CD) spectra we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN,N'-Dicyanoquinone Diimines (DCNQIs): Versatile Acceptors for Organic ConductorsSiegfried Hünig and Edith HerberthView Author Information Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany Cite this: Chem. Rev. 2004, 104, 11, 5535–…