Materials Literature
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From the reaction of the elemental lanthanides and actinides in molten alkali metal/polychalcogenide salts, several new ternary compounds have been discovered. Specifically, these phases are K 4 USe 8 (I) and ALnQ 4 (II), where A = K, Ln = Ce or Tb, and Q = Se or A = Rb, Ln = Ce, Q = Te; and NaLnS 3 (III), where Ln =…
A new type of phthalocyanine-based chromophore system having two metallophthalocyanine rings bound together through ethynyl linkages has been synthesized.
In order to investigate the effect of film thickness of thin graphite crystals on the electrical properties, we prepared thin graphite films by cleaving a kish graphite (KG) crystal with the rrr value of 32.3. The values of the thickness of the graphite films were ranging from around 300 to 1000Å. Keeping these graphi…
Amorphous magnetic glass-covered wires are of interest for basic research and potential applications. Their specific magnetic behavior originates in their very small diameters and in the high internal stresses induced during preparation. Removal of the glass cover leads to significant changes in their magnetic propert…
The compressive creep properties of hot‐pressed Si 3 N 4 8Y 2 O 3 —3Al 2 O 3 (wt%) have been investigated in the temperature range of 1543–1603 K in air. The stress exponent, n , of the power creep law was determined to be 1.5, and the activation energy was determined to be 650 kJ/mol. Transmission electron microscopy…
The distribution of residual deformation effects in textured metal sheets was studied by X‐ray diffractometric methods using a position‐sensitive detector (PSD). The elaborated procedure is based on the geometric principles of texture measurement, while the PSD technique allows to observe the profile of the X‐ray line…
The title radical ion salts of 4-iodotetrathiafulvalene1 have been prepared and their X-ray crystal structures determined at 150 K. The 2:1 salt [ITTF .+ ] 2 {Pd[S 2 C 2 (CN) 2 ] 2 } 2- 3forms a mixed stack structure in which the Pd(mnt) 2 anions intermingle with pairs of iodo-TTF radical cations, i.e. a DDADDA stacki…
Poly (D, L-lactide) (PLA) and poly (D, L-lactide-co-glycolide) (PLGA) microparticles were evaluated for their in vitro degradation behavior in 0.1 M phosphate buffer pH 7.4 at 37°C. The influence of polymer characteristics, particle size, and preparation technique was investigated. Differential scanning calorimetry (D…
FTIR spectra are reported showing the effects of thiophene on CO adsorption on Co 3 O 4 /SiO 2 and Co/SiO 2 catalysts and of SO 2 on CO adsorption on Co/SiO 2 . Six types of cobalt adsorption site were present on reduced Co/SiO 2 and all could be poisoned by thiophene or SO 2 at 295 K. SO 2 was a stronger poison than…
Dipotassium benzene-1,2-diselenolate, C 6 H 4 (SeK) 2 -1,2 obtained from the reaction of potassium tert-butoxide with a (benzene-1,2-diselenolato)zirconocene, was treated with C 6 H 4 [SeCH 2 (CH 2 OCH 2 ) n CH 2 X] 2 -1,2 (X = Cl, n = 1 1, n = 2 2, n = 3 3 or X = Br n = 3 4) leading to tetraselenacrown ethers C 6 H 4…
Ring-opening polymerization of δ-valerolactone (δ-VL) initiated with (5,10,15,20-tetraphenylporphinato)aluminum methoxide ((TPP)AlOMe, 1; X = OMe) was dramatically accelerated upon addition of methylaluminum bis(2,6-di- tert -butyl-4-methylphenolate) ( 2a ) and bis(2,4,6-tri- tert -butylphenolate) ( 2b ) via coordinat…
The chiral metallocene rac-ethylenebis(1-indenyl)zirconium dichloride, when immobilised on the surface of methylalumoxane-modified mesoporous silica MCM-41, is an effective catalyst for the production of highly isotactic polypropene with a unique spherulite morphology; Zr K-edge EXAFS studies of the organometallic–ino…
The application of glow discharge plasma to the surface of wool fabric is known to increase fiber hydrophilicity and confer a partial shrink resist effect during washing. In this work, four different polymer systems, Basolan SW, Basolan MW, Polymer G, and Polymer PL, are applied onto plasma treated wool fabric to enha…
The magnetic behaviour of then=2 Ruddlesden–Popper phases Sr 2 LnMn 2 O 7 is very sensitive to the Ln 3+ lanthanide cation. In samples with larger, more basic lanthanide cations (Ln=Nd, Pr) antiferromagnetic phases with ordering temperatures in the region of 130 K co-exist with phases showing a magnetic response sugge…
A dinuclear manganese(II) complex [Mn 2 L 4,4 (O 2 CMe) 2 ] has been prepared and its structure, properties and catalase-like function studied in comparison with the analogous [Mn 2 L m , n (O 2 CMe) 2 ] [m,n = 2,3; 2,4; or 3,3; (L m , n ) 2- denotes macrocycles containing two 2,6-bis(iminomethyl)-4-methylphenolate en…
The syntheses, by fixation of atmospheric CO 2 , and the crystal structures of the new tetranuclear µ 4 -CO 3 2- compounds [(µ 4 -CO 3 )(µ-Br) 2 {Cu 4 (bapa) 4 }]Br 4 1 and [(µ 4 -CO 3 )(µ-Cl) 2 {Cu 4 (bapma) 4 }]Cl 4 ·12H 2 O 2, [bapa and bapma are bis(3-aminopropyl)amine and bis(3-aminopropyl)methylamine respectivel…
Surface modification with thiols and redispersion into non-micellar solvents of CdS ultrafine particles prepared in situ in reverse micellar systems have been investigated. An excellent redispersion in pyridine is observed when the CdS ultrafine particles are prepared with 0.4 < y (=[S2–]/[Cd2+]) < 0.9 owing to the bi…
Abstract Lösliches μ‐Carbidodi(pyridinphthalocyaninato(2−)eisen(IV) und ‐ruthenium(IV) wird durch die Umsetzung von μ‐Carbidodi(phthalocyaninato(2−)eisen(IV) und ‐ruthenium(IV) mit Pyridin als Pyridin‐Solvat, [{M(py)pc 2− } 2 (μ‐C)] · py (M Fe, Ru) isoliert. Die isotypen isotypen Komplexe kristallisieren orthorombis…
Hydrothermal synthesis of V2O5+TMA+LiOH in a 1:2:1 molar ratio after adjusting the pH with acetic acid to pH 3.3 resulted in the formation of a new vanadium oxide, TMAV8O20 . The new vanadium oxide has a monoclinic structure with space group C2/m and lattice parameters: a=23.655(2), b=3.5931(3), c=6.3175(5) Å and β=10…
The crystal structure of [CuL 2 ]·2.5H 2 O·0.5thf [L = 3-(4-pyridyl)pentane-2,4-dionate; thf = tetrahydrofuran] has been solved; a small intermolecular antiferromagnetic interaction between Cu sites implies that L would be useful in synthesising heterobimetallic and polymeric species with interesting magnetic properti…