Materials Literature
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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…
The low-load compression behavior of woven fabrics is very important in terms of handle and comfort. The chief concern of the present work is to describe the pressure–thickness relationship of woven cotton fabrics in low-load regions by a mathematical expression. Although the surface structures of wool and cotton fabr…
The effects of plasma treatment of pyromellitic dianhydride-4,4'-oxydianiline polyimide (PMDA-ODA PI) on the adhesion strength of novolac epoxy resin/PMDA-ODA PI joints were studied. The adhesion strength of novolac epoxy resin/PMDA-ODA PI joints increased by plasma treatment of PMDA-ODA PI. Oxygen and argon plasmas w…
Through in-situ TEM observation on an Fe-30.3 mass%Mn-6.1 mass%Si shape memory alloy under extending at room temperature, it is found that on a lower applied stress level, the ε-martensite plates are preferentially formed at interfaces of pre-existing overlapped stacking faults or ε-martensites with γ-phase especially…
SummaryElectrodeposition of Zn-Mn (0÷50 w/o) onto carbon steel sheet and wire is discussed in the present paper. An original bath is proposed and effects of stabilisers are studied. Baths and deposits are studied from the electrochemical and structural points of view. Electrochemical investigations include galvanostat…
Surface charge distributions of disk type aluminas held between a backside electrode (alumina holder) and a needle electrode to be excited by an impulse voltage (rise time 64 /spl mu/s, wave tail 700 /spl mu/s) were measured. The measurement of surface charge distribution on the whole surface area of alumina YSA998 an…
Photoinduced electron transfer reactions have been observed with transient absorption spectroscopy from zeolite framework to a few guest aromatic molecules with strong electron accepting nature represented by 1,2,4,5-tetracyanobenzene (TCNB): photoexcitation of the guest molecules adsorbed in cavities of faujasite zeo…
We consider the ordering of molecular dipoles at a nematic surface and the influence of this ordering on the equilibrium director orientation and the anchoring energy. Both phenomenological and molecular approaches are used. We show that a thin, spontaneously polarized layer will appear even at a structureless nematic…
In a previous study we have explored how the wettability of a spherical solid particle resting in a fluid/fluid interface can be influenced by effects of line tension (τ) acting in the circular three-phase contact line around the particle. Here, we extend that study to consider possible effects of line tension on a sm…
The vapour-phase catalytic oxidation of benzyl alcohol has been carried out over NaZSM-5 supported copper and alkali-metal-added NaZSM-5 supported Cu catalysts. The NaZSM-5 zeolite supported copper catalyst has been prepared by three different methods, impregnation (Cu imp1 /NaZSM-5), modified impregnation (Cu imp2 /N…
The main structure of shark type I collagen is similar to that of land mammals, with a partial difference in amino acid sequence and post-translational modification. By static light scattering, the weight-average molecular weight of shark collagen (7.52 x 10(5)) suggests the presence of some aggregated molecules, olig…