Materials Literature
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Single crystals of manganese(II) octa-uranium(IV) hepta-deca-sulfide, MnU(8)S(17), were grown from the reaction of the elements in a RbCl flux. MnU(8)S(17) crystallizes in the space group C2/m in the CrU(8)S(17) structure type. The asymmetric unit is composed of the following atoms with site symmetries shown: U1 (1),…
Abstract A series of poly(N‐vinyl carbazole) (PNVCz)/sodium montmorillonite (Na+MMT) and PNVCz/organo‐MMT composite materials have been successfully prepared by in situ free radical polymerization with cerium ammonium nitrate (CAN) as initiator in the presence of inorganic nanolayers of hydrophilic Na+MMT or organophi…
HIV-1 protease (PR) was cocrystallized in competitive mixtures of saquinavir (SQV) and ritonavir (RTV) in an attempt to compare the relative potencies of inhibitors using a crystallographic approach. The mixture ratio of the RTV/SQV was in the range of 1:1 to 50:1. The crystal form obtained with 1:1 and 5:1 ratios of…
We have fabricated MgB 2 superconducting tapes with a powder-in-tube (PIT) technique using Mg(BH 4 ) 2 precursor. Heat treatment decomposes Mg(BH 4 ) 2 and subsequently forms MgB 2 as nearly single phase. Although the tapes carry supercurrent at 4.2 K and 0 T, the transport critical current ( I c ) values of the tapes…
The asymmetric unit of the title compound, {[Cd(2)(NCS)(2)(SO(4))(C(6)H(17)N(3))(2)]·0.5CH(3)OH}(n), consists of two Cd(2+) cations, two thio-cyanate and one sulfate anion, two bis-(3-amino-prop-yl)amine co-ligands and one methanol molecule with half-occupancy. Each Cd(2+) cation is coordinated by four N atoms of one…
There are two independent La(III) cations in the polymeric title compound, {[La(2)(C(7)H(3)NO(4))(3)(H(2)O)(4)]·2H(2)O}(n). One is nine-coordinated in an LaN(2)O(7) tricapped trigonal-prismatic geometry formed by three pyridine-2,6-dicarboxyl-ate anions and two water mol-ecules, while the other is ten-coordinated in a…
In the title compound, [Ni(C(11)H(13)N(2)O(4))(2)]·C(3)H(7)NO, the Ni(II) ion is octa-hedrally coordinated in an N(2)O(4) environment by two identical Schiff base ligands. The Ni-O bond lengths range from 2.004 (2) to 2.106 (2) Å, while the Ni-N bond lengths are 2.038 (2) and 2.0465 (19) Å. The cis bond angles range f…
In this work, we present the variation of exchange constant (J exc ) and magnetocaloric effect (MCE) in LaFe 13-x Si x (x = 1.6, 1.9 and 2.2) compounds. NaZn 13-type LaFe 13-x Si x intermetallic compounds were prepared by arc melting in an atmosphere of highly pure argon gas. X-ray results indicated a slight decrease…
The crystal structure of despujolsite [tricalcium manganese bis-(sulfate) hexahydroxide tri-hydrate], the Ca/Mn member of the fleischerite group, ideally Ca(3)Mn(4+)(SO(4))(2)(OH)(6)·3H(2)O, was previously determined based on X-ray diffraction intensity data from photographs, without H-atom positions located [Gaudefro…
The in situ molecular scale response of end-grafted polystyrene to shear against a deuterated polystyrene melt was investigated with neutron reflectometry. The derived grafted polystyrene density profiles showed that the grafted polystyrene was retained on the quartz wafer during the measurements. The profiles suggest…
This work reports on copper tetra(3-nitro-5- tert -butyl)phthalocyanine (CuPc*) exhibiting complex but well-controlled phase behavior. A key structural feature of this dye is the thermodynamically stable χ-type phase whose optical absorbance is red-shifted with respect to the CuPc* molecule. Small-angle X-ray scatteri…
In the title complex, [Ni(C(5)H(9)NO(2))(2)(H(2)O)(2)], the Ni(II) atom, located on a centre of inversion, is trans-coordinated by two O atoms and two N atoms from d-bidentate valine and l-bidentate valine ligands and two water O atoms in an octa-hedral geometry. In the crystal, the discrete mononuclear units are link…
Abstract The ternary nitridochromate Ce2[CrN3] (orthorhombic Immm, a = 378.56(1) pm, b = 340.88(2) pm, c = 1251.27(4) pm) was synthesized in single phase form from the binary nitrides utilizing the decomposition of CrN to Cr2N. Magnetic susceptibility measurements as well as X‐ray absorption spectroscopy indicate a Ce…
Phonon-drag effect usually occurs in single crystals at very low temperatures (10–200 K). Strong phonon-drag effect is observed in ultra-thin β- FeSi 2 films at around room temperature. The Seebeck coefficient of a 23 nm-thick β- FeSi 2 film can reach -1.375 mV/K at 343 K. However, the thermoelectric power factor of t…
We present ab initio studies based on density functional theory within the local spin density approximation for different Ni nanocontacts and show changes in the conductance of such constrictions due to atomic rearrangements in the contact. In particular we consider an Ni particle and show that the magnetoresistance c…
Following the idea of realizing an extremely anisotropic scatterer by combining positive and negative permittivity materials in a composite sphere, we discuss here some of the features and potential applications of extreme boundary conditions in optics. We analyze the scattering features and surface boundaries of an i…
Silicon nanowires were synthesized by using a vapor-liquid-solid method and atmospheric pressure chemical vapor deposition with silicon tetrachloride as the Si source. A thin Au film (1-nm thick) deposited on a Si substrate was used as a catalyst, and Au nanodots were formed subsequently by using a high-temperature ch…
We present a method for efficient calculation of exchange correlation in a density-functional theory calculation with Gaussian basis functions. It seamlessly combines the treatments of smooth (low-energy cutoff) and nonsmooth parts of the electron density such that computational performance can be maximized without ap…
Green body formation with nanoscale powders poses unique challenges. This report discusses two specific green‐forming procedures: pressure filtration and dry‐powder compaction. Green compacts were formed from suspensions of hydrothermally derived YTZP prepared in the presence of bicine, which acts as a protective coll…
Two models of temporarily anionic sulphatoethylsulphone reactive disperse dyes were applied to wool, polyester and wool/polyester blend fabrics at different dyeing pH. Maximum exhaustion values and colour yield were observed at pH 7. The results showed that reactive disperse dyes containing bis‐sulphatoethylsulphone r…