Materials Literature
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Abstract Two-dimensionally (2-D) networked gold nanowires have been prepared by a simple chemical reduction method using glycerol as capping agents. It was found that 2-D gold nanowires were more active than spherical gold nanoparticles on hydrogen generation from sodium borohydride solution.
The yeast transcriptional activator Zap1 contains two uncommon structural motifs designated zinc finger pair domains. The hallmark of this domain is the packing of two zinc finger motifs in one globular unit. One finger pair domain in Zap1 contains the AD2 transactivation domain. Zn(II) binding to this domain (ZF1/2)…
This study presents new investigations on chemical syntheses and characterization of new asymmetric AB(n)-shaped amphiphilic diblock methoxy poly(ethylene glycol)-b-[poly(l-lactide)](n), MPEG-b-(PLLA)(n) (n = 2, 4, and 8), bridged with dendritic ester linkages. First, a new series of A(OH)(n)-shaped hydroxy end-capped…
We report the preparation, characterization and mechanical properties of DNA/phosphorus dendrimer multilayer microcapsules. The shells of these microcapsules are composed by alternating DNA and positively charged dendrimer G n (NH + Et 2 Cl - ) m ( n = 1, 2, 3, 4; m = 12, 24, 48, 96). The same multilayers were constru…
Enzymatic ring-opening copolymerization of 5-benzyloxy-trimethylene carbonate (BTMC) and 1,4-dioxan-2-one (DON) was investigated for the first time. Immobilized porcine pancreas lipase (IPPL) on silica particles was selected to perform the copolymerization. A series of novel biodegradable copolymers with different com…
Psu, a coat protein from bacteriophage P4, has been shown to inhibit Rho-dependent transcription termination in vivo. Co-overexpression of Psu and Rho led to the loss of viability of the cells, which is the consequence of the anti-Rho activity of the protein. The antitermination property of Psu is abolished either by…
For newly prepared sodium tetrakis(3-heptafluorobutylryl-(+)-camphorato) Ln(III) complexes, the X-ray crystal analysis revealed an unprecedented pseudo-achiral dodecahedron (DD-8 (D(2d))), whereas in CHCl3 solution, the exciton CD and 19F NMR spectra showed a novel chiral Delta-SAPR-8 (C4) configuration which is stere…
We synthesized two polyimides (PIs), poly(4,4‘-(9,9-fluorenyl)diphenylene cyclobutanyltetracarboximide) (CBDA-FDA) and poly(4,4‘-(9,9-fluorenyl)diphenylene pyromellitimide) (PMDA-FDA), and investigated in detail the surface morphology, molecular orientation, and nematic liquid crystal (LC) alignments of rubbed CBDA-FD…
TiO 2 hierarchical nanoporous ring arrays are constructed on a solid surface by an annealed template-induced sol-soaking strategy. The ring size can be controlled by changing the sol concentration and varying the annealing time of the polystyrene sphere colloidal monolayer. The sol−gel process generates porous nanocry…
Small size, monodispersed hexagonal particles of Mg,Al-CO 3 hydrotalcite-like compounds have been synthesized in short periods of time by the microwave−hydrothermal method. An in-depth study of the influence of the irradiation time and the process temperature has been carried out. Well-crystalized materials with relat…
We report a unique hierarchical amplification of chiral information from a nonracemic guest to macromolecular helicity, followed by a mesoscopic, supramolecular cholesteric twist in water. This remarkable chiral amplification involves two-step chirality transfer processes, which enable the detection and sensing of an…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTComparison of Interdiffusion Behavior between Cyclic and Linear Polystyrenes with High Molecular WeightsDaisuke Kawaguchi, Keisuke Masuoka, Atsushi Takano, Keiji Tanaka, Toshihiko Nagamura, Naoya Torikai, Robert M. Dalgliesh, Sean L…
Gold nanoparticles functionalized with amphiphilic polybutadiene-poly(ethylene glycol) (PB-PEG) V-shaped arms formed stable Langmuir monolayers at the air-water and the air-solid interfaces. At these interfaces, the binary arms vertically segregated into a dense polymer corona, which surrounded the gold nanoparticles,…
A series of five Fe(III) phosphonate clusters with four different topologies is reported. The choice of coligand carboxylate plays an important role in directing the structure of the molecule. [Fe9(O)4(O2CCMe3)13(C10P)3] (1) and [Fe9(O)2(OH)(CO2Ph)10(C10P)6(H2O)2](CH3CN)7 (2; camphyl phosphonic acid, C10H17PO3H2 = C10…
We report a further advance in the bulk purification of nitric acid-treated single-walled carbon nanotubes (SWNTs) by use of high-speed centrifugation. We have already shown that low-speed centrifugation is effective in removing amorphous carbon (AC). In these earlier experiments, the AC preferentially suspends in aqu…
Large-scale hierarchical CdS dendrites were synthesized by hydrothermal treatment of CdCl 2 and thiourea, using poly(ethylene glycol) (PEG) as a capping agent. The products were characterized by X-ray diffraction, energy-dispersive X-ray spectrometry, transmission electron microscopy, field emission scanning electron…
Complex experimental and theoretical study of the magnetic, magnetoelectric, and magnetoelastic properties of neodymium iron borate NdFe3(BO3)4 along various crystallographic directions have been carried out in strong pulsed magnetic fields up to 230 kOe in a temperature range of 4.2-50 K. It has been found that neody…
A series of homodinuclear lanthanide(III) complexes with the 4-cba ligand, [La2(4-cba)6(phen)2(H2O)6] (1) and [Ln2(4-cba)6(phen)2(H2O)2] (Ln = Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), and Dy (7); 4-Hcba = 4-cyanobenzoic acid; phen = 1,10-phenanthroline), have been synthesized and structurally characterized by single-cr…
This work reports the evaluation of several theoretical approaches to the zero-field splitting (ZFS) in transition metal complexes. The experimentally well-known complex [Mn(acac)3] is taken as an example. The direct spin-spin contributions to the ZFS have been calculated on the basis of density functional theory (DFT…
The stress corrosion cracking (SCC) of a commercial austenitic stainless steel type 316 was investigated as functions of applied stress, sensitizing temperature and sensitizing time in 0.82 kmol/m3 sulphuric acid solution by using a constant load method. The applied stress dependence of the three parameters (lss, stea…