Materials Literature
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We report molecular structures and temperature-dependent magnetic susceptibility data for several new metal complexes of heterospin triplet ground-state biradical ligands. The ligands are comprised of both nitronyl-nitroxide (NN) and semiquinone (SQ) spin carriers. Five compounds are five-coordinate M(II) complexes (M…
Highly conducting crystals based on single-component gold complexes with extended-TTF dithiolate ligands [Au(dmdt)(2)](0+) (1) and [Au(tmdt)(2)](0+) (2) were prepared (dmdt = dimethyltetrathiafulvalenedithiolate and tmdt = trimethylenetetrathiafulvalenedithiolate). On the basis of the synchrotron radiation powder diff…
Molecular dynamics (MD) simulations have been used to examine the structure and dynamics of a system containing an inorganic nanoparticle embedded in a polymer matrix. This paper represents a preliminary investigation into the feasibility of examining such relatively large systems using atomistic modeling techniques.…
Transverse NMR relaxation in a macroscopic sample is shown to be extremely sensitive to the structure of mesoscopic magnetic susceptibility variations. Such a sensitivity is proposed as a novel kind of contrast in the NMR measurements. For suspensions of arbitrary shaped paramagnetic objects, the transverse relaxation…
Metal colloidal particles are widely used as building blocks for novel materials with photonic applications. In this article, we demonstrate the synthesis of silver particles with a wide range of sizes (up to 1200 nm in radius) by reducing silver nitrate with ascorbic acid in aqueous solutions in the presence of a pol…
Abstract New multifunctional coupling agents with one 2‐oxazoline group, one oxazinone group, and one allyl ether group were prepared. It was shown by means of model reactions that under the conditions of reactive extrusion, the 2‐oxazoline group and the oxazinone group reacted selectively with carboxylic groups and a…
The potential syntheses of pure nitrogen materials may involve photolysis of azide compounds. In this work, compressed solid samples of NaN 3 were photolyzed in gem anvil cells at pressures up to 5.0 GPa. Reaction rates and mechanisms for the photolytic processes were studied using single-shot time-resolved (microseco…
Continuous crack-free microporous silica membranes were fabricated on the ordered mesoporous sublayer and possessed very promising properties of high porosity and narrow pore size distribution. These membranes displayed very high permeances and selectivities well over the Knudsen diffusion limit for gas separation. Th…
The reactivity and equilibrium thermodynamic studies of tetra-p-sulfonatophenyl porphyrin rhodium hydride ([(TSPP)Rh-D]-4) with CO, aldehydes and olefins that produce formyl, alpha-hydroxyalkyl and alkyl complexes have been explored in water and compared with the related reactions in non-aqueous media.
Treatment of FeCl2 with the lithium derivative of [CH2(Ph2PNC6H2Me3-2,4,6)2] in THF and crystallisation from Et2O gave the ‘ate’ complex [{CH(Ph2PNC6H2Me3-2,4,6)2}Fe(μ-Cl)2Li(THF)(OEt2)] in which the iron is four-coordinate and the chlorides bridge to lithium. Treatment of [M{N(SiMe3)}2] (M = Mn, Fe, Co) with [CH2(Ph2…
A novel cadmium phosphate, Cd(2,2′-bipy)(H2PO4)2, has been hydrothermally synthesized in the presence of 2,2′-bipyridine (2,2′-bipy), which acts as a ligand. The structure consists of a network of CdO4N2 octahedra and H2PO4 tetrahedra, forming an infinite one-dimensional chain.
A study on the sequence and composition of copolyamides formed by activated exchange reactions occurring in the melt mixing of Ny6,10 and Ny6,6 is reported. Equimolar mixtures of Ny6,10, Ny6,6, and carboxyl-terminated Ny6,6 (Ny6,6-COOH) samples were melt mixed at different temperatures (290−310 °C) for different times…
We investigate the energy spectra of clean incommensurate double-walled carbon nanotubes, and find that the overall spectral properties are described by the critical statistics similar to that known in the Anderson metal-insulator transition. In the energy spectra, there exist three different regimes characterized by…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPreparation of Oriented Ultrathin Films via Self-Assembly Based on Charge Transfer Interaction between π-Conjugated Poly(dithiafulvene) and Acceptor PolymerXiaqin Wang, Kensuke Naka, Hideaki Itoh, Takashi Uemura, and Yoshiki ChujoVi…
Alumina-based refractory materials are extensively used in high-temperature applications, such as linings in waste incinerators. A significant problem affecting the performance of these materials is the presence of porosity and material inhomogeneity, which promote molten slag corrosion and chemical degradation. Singl…
Abstract The structure, morphology, and crystallization behavior of a random ethylene–propylene copolymer, containing 2 wt % ethylene sequences, are analyzed and compared with those of a plain polypropylene sample by means of optical and scanning microscopy, wide‐angle X‐ray scattering, and calorimetry. For the copoly…
Vapor deposition was used to synthesize surface-grafted polypeptides from a wide range of α-amino acids: γ-benzyl- l -glutamate, γ-methyl- l -glutamate, β-benzyl- l -aspartate, O -benzyl- l -serine, S -benzyl- l -cysteine, O -benzyl- l -tyrosine, l -tryptophan, l -phenylglycine, and l -phenylalanine. l -Alanine and l…
Blends of functionalized polystyrenes (3NPS) having three dimethylamino groups {N(CH 3 ) 2 } at one end, with sulfonic acid end-capped polyisoprenes (HO 3 SPI) were prepared in a ratio of N(CH 3 ) 2 /SO 3 H = 1. The morphology of these blends was studied by small-angle X-ray scattering and transmission electron micros…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTMicrophase Separation and Crystallization in an Asymmetric Diblock Copolymer: Coupling and CompetitionLiangbin Li, Yaelle Séréro, Michel H. J. Koch, and Wim H. de JeuView Author Information FOM-Institute for Atomic and Molecular Phy…
A series of novel mesogens have been prepared by a five-fold Sonogashira reaction of terminal acetylenes with a functionalized pentabromophenol derivative. The corresponding side-chain substituted polymers were prepared by an analogous polymer substitution reaction. The mesogens differ in the nature of the substituent…