Materials Literature
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We report the syntheses, structures and magnetic properties of two decametallic Ni(II) clusters with unprecedented supertetrahedral cores, stabilised by the (hitherto unobserved) micro(6)-coordination modes of the tris-alkoxides [MeC(CH(2)O)(3)](3-) and [C(6)H(9)O(3)](3-).
Epoxy polymers are frequently used for electronic purposes, in particular for built up layers and micro-vias in advanced printed circuit boards. The adhesion of the plated metal layers to this polymer surface is of prime importance for the reliability of the interconnection. Chemical treatment of the polymer surface c…
The structure of YaaE from Bacillus subtilis was determined at 2.5-A resolution. YaaE is a member of the triad glutamine aminotransferase family and functions in a recently identified alternate pathway for the biosynthesis of vitamin B(6). Proposed active residues include conserved Cys-79, His-170, and Glu-172. YaaE s…
The magnetic properties of polymers prepared by polymerization of the magnetic cluster Mn12O12(acrylate)16 with various portions of ethyl acrylate as co-monomer are reported. According to SAXS studies, the clusters are homogeneously distributed in the polymer. Ac susceptibility measurements show superparamagnet-like b…
Mesoporous oxide thin films with a mixed silica/zirconia framework were reproducibly synthesised for the first time by a two-step dip-coating method. Different synthesis strategies were developed for the Si-rich and Zr-rich regions. These optical quality films are highly organised and oriented, stable, and exhibit amo…
We describe a newly developed scanned electrospinning technique that can be used to form a variety of one-dimensional polymeric nanostructures. It is a straightforward technique that enables the rapid fabrication of oriented polymeric nanowires as well as their integration with lithographically defined surfaces. It pr…
Thia-bridged tetra- and octa-poly(oxyethylene)-substituted metal free- and Ni(II) phthalocyanines have been synthesized from the corresponding phthalonitrile derivatives in the presence of the anhydrous metal salt (NiCl2) or a strong organic base. The new compounds have been characterized by elemental analyses, UV/vis…
A novel dodecanuclear manganese metalladiazamacrocycle was synthesized employing a new pentadentate ligand N-2-pentenoylsalicylhydrazide (H(3)tpeshz) by supramolecular self-assembly. The backbone of this metal-organic assembly is a repeating unit of an M-N-N-M linkage that extends to complete a 36-membered cyclic stru…
We report electrical measurements of the radio frequency response of carbon nanotube field-effect transistors (CNFETs). The very low current drive of CNFETs makes conventional high-frequency measurements difficult. To overcome this problem, we have used a novel approach to easily measure the response up to 250 MHz in…
Achieving a purified fraction of diatom frustules from soft sediment samples is an essential requirement for using their biogenic silica as a carrier of paleolimnological and paleoenvironmental information. Because diatom frustules behave hydrodynamically unlike most mineral grains, these types of particles can theore…
Mild fabrication of anisotropic metal-lipid nanotube (LNT) nanocomposites, in which Au nanoparticles of 3-10 nm wide are organized in a glycolipid nanotube hollow cylinder, has been achieved by filling the internal channel of the LNT with HAuCl(4) aqueous solution by capillary force and subsequent photochemical reduct…
The ruthenium-supported isopolyanion [HW(9)O(33)Ru(II)(2)(dmso)(6)](7-) (1) is composed of a nonatungstate wheel stabilized by two Ru(dmso)(3) groups, representing the first structurally characterized Ru-coordinated polyoxotungstate and a novel class of isopolyanions supporting photochromic moieties.
ABSTRACT: Dielectric spectroscopy measurements over a broad range of temperature and pressure were carried out on poly(oxybutylene) (POB), a type A polymer (dielectrically active normal mode). There are three dynamic processes appearing at lower frequency: the normal and segmental relaxation modes and a conductivity a…
Purified single-walled carbon nanotubes (SWNTs) and cyclodextrins (CDs) mixed by a mechanochemical ‘high-speed vibration milling technique’ (HSVM) are soluble in an aqueous solution because of the formation of SWNT·CDs complexes and the debundling of SWNTs.
Abstract 1‐Ethyl‐2‐( p ‐tolylazo)imidazole [ p ‐Me−C 6 H 4 −N=N−C 3 H 2 N 2 − Et‐1; TaiEt], an unsymmetrical N,N′‐blocker, and azide (N 3 − ), a versatile intermediary, coordinate to manganese( II ) forming an alternating chain with the formula [Mn(TaiEt)(N 3 ) 2 ] n ( 1 ). The compound crystallizes in the triclinic P…
Abstract The hybridization of lipid membranes with inorganic silica‐based framework results in mechanically stable biomembrane mimics. This account describes three types of silica‐based biomimetic membranes. As the first example, a Langmuir monolayer of dialkylalkoxysilane was polymerized and immobilized onto a porous…
Abstract The synthetic chemistry of tetrathiafulvalene (TTF)-type electron donors has been markedly promoted by introducing two key reactions, the one-pot preparation of 1,3-dichalcogenole-2-chalcogenones from terminal alkynes and the formation of heterocyclic rings via transalkylation on a chalcogen atom. In combinat…
Polymethyl methacrylate (PMMA) microspheres with clear surface and diameter close to 1μm were synthesized by newly soap-free emulsion polymerization. The results showed that the presence of ethanol and NaCl made the increase of diameter and distribution, while the presence of toluene could avoid the problem of the inc…
ЕНЕРҐIЯ ОДНОГО ТА ДВОХ ЕЛЕКТРОНIВ У ДВОХ СФЕРИЧНИХНАНОКРИСТАЛАХ СИСТЕМИ β-HgS/CdS В
Sol-gel method and successive thermal treatments in vacuum and nitrogen atmosphere were employed to synthesize magnetite nanoparticles isolate them with the aid of amorphous silica. Thermogravimetric and differential thermal analyses coupled with mass spectrometry, X-ray diffraction, transmission electron microscopy,…