Materials Literature
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A none-washing technique for layer-by-layer deposition of polyelectrolyte on colloids based on careful monitoring of colloid recharging is elaborated. It allows applying the technique for colloid systems in larger scale than laboratory, and avoiding the expensive washing procedure with centrifugation or filtration. Th…
We investigate the structural and optical properties of carbon nitride (C3N4) nanotubes (CNNts) built from condensed heptazine cores (C6N7) with different chirality and connection patterns. In particular, heterocycles in a hexagonal ordering exhibit the lowest energy configuration for the CNNts studied. Overall, hepta…
Well-defined and uniform double-walled Cu(7)S(4) nanoboxes with an average edge length of about 400 nm have been successfully synthesized by using Cu(2)O nanocubes as sacrificial template based on an inward replacement/etching method. The key step of the process involves repeated formation of Cu(7)S(4) layer in Na(2)S…
Dodecatungsto-silicic H(4)SiW(12)O(40) and -phosphoric acids H(3)PW(12)O(40) were deposited on silica by a classical impregnation technique. The resulting materials were studied by in situ Raman and infrared spectroscopy, XPS and by solid-state (1)H MAS NMR as a function of their dehydroxylation temperature. The data…
We report the synthesis of luminescent Ag clusters through the interfacial etching of mercaptosuccinic acid (MSA) protected silver nanoparticles, Ag@MSA, with guanine at the water-toluene interface. The clusters exhibiting well-defined absorption emit in the near-infrared (NIR) region. Crude clusters were separated us…
The nanostructured CePO4 with hexagonal and monoclinic phases were controllably synthesized through a hydrothermal route at a low temperature of 100 °C by simply varying the reactant PO4/Ce molar ratio. By analyzing the synthesis procedure and product structures, the formation mechanism of the CePO4nanostructures was…
A stable aqueous dispersion of hybrid silica nanocapsules encapsulating fluorescent conjugated polymers have been successfully synthesized via a facile and highly benign approach of templated condensation of silica precursors at the core-corona interface of PEO-based block copolymer micelles.
Two topologically equivalent triangular POM aggregates based upon the Keggin () and Dawson () cluster species, with distinctive double {W-O-M} intra-molecular linkages involving Mn(III) and Co(III) ions are presented; both these compounds demonstrate electrocatalytic activity.
We previously reported that poly(2-methoxyethyl acrylate) (PMEA), which has excellent blood compatibility, contains a large amount of freezing bound water. In order to confirm the role of freezing bound water in determining blood compatibility, poly(tetrahydrofurfuryl acrylate) (PTHFA) was newly synthesized and the th…
A stable monoprotonated porphyrin (porphyrin monoacid) was obtained by reaction of saddle-distorted dodecaphenylporphyrin with anthracene sulfonic acids and the crystal structures of the supramolecular assemblies were determined.
Silkworm-derived fibroin, which constitutes the core of the silk filament, is an attractive protein-polymer for biomedical applications. Fibroin can also be processed into a variety of 2-D and 3-D formats to match morphological and structural features to specific applications. The focus of the present research was to…
Pd membranes of excellent stability and flux were prepared with multi-legged anchors by electroless plating of Pd on a porous support modified by a zeolite barrier layer containing Pd seeds; these membranes provide stable phenol production by direct hydroxylation of benzene.
Surface properties of thermally stable phosphonium-modified montmorillonite were investigated at both room temperature and 220°C. These properties were compared with those of pristine and ammonium-modified montmorillonite. Surface properties at room temperature were calculated from contact angles measured using sessil…
Abstract—This paper presents a class of ultra-thin metamaterial absorbers, which consists of periodic microstrip lines on top of a planar lossy substrate backed by a conducting metallic plate. A highly efficient full-wave analysis method was developed to solve the electromagnetic response of the absorbers. The influen…
Highly ordered body cubic (Im-3m) mesoporous phenol-formaldehyde resins (OMR) monoliths were successfully synthesized at high temperatures (200–260 °C) by the assembly of copolymer surfactant (F127) with preformed resol. The preformed resol was obtained from heating a mixture of phenol and formaldehyde at 70 °C. These…
Structure isomers of the Au(10)(-) cluster and their chemical reactivity with O(2) are studied using photoelectron spectroscopy under different experimental conditions. In addition to the global minimum triangular D(3h) structure, at least three low-lying isomers (X', X'', and X''') are observed distinctly using argon…
Reactions of Ln(III) acetate (Ln = Pr and Nd) and a polydentate Schiff-base in a mixture of methanol and acetonitrile resulted in the unprecedented assembly of novel Ln(10) aggregates containing two Ln(5) pentagons templated by mu(5)-CO(3)(2-), introduced via spontaneous fixation of atmospheric carbon dioxide. Magneti…
Lavender oil is extracted from lavender herb, collected in the east region of Morocco (Tafoughalt) and tested as corrosion inhibitor for mild steel in 1 M HCl. The inhibiting effect was studied by weight loss measurements, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. Polarisat…
With the Zn–Schiff-base [ZnL11(Py)] or [ZnL22(Py)] from the simple Salen-type Schiff-base ligand H22L11 or H22L22 (H22L11: N,N′-bis(salicylidene)ethylene-1,2-diamine; H22L22: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O2O2 portion as the precursor, two series of eight trinuclear Zn2Ln arrayed compl…
The ionic liquid compositions (ILC) composed of the Keggin-type phosphotungstate-functionalized ionic liquid of [Dopy]3[PW12O40] (1) and the amphipathic IL mixture of [Bpy]BF4 and [Dopy]BF4, were constructed as an effective catalytic system and ideal reaction medium for alkene epoxidation by aqueous H2O2, in which the…