Materials Literature
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The synthesis of periodic mesoporous organosilica incorporating ionic diarylimidazolium species was achieved by hydrolysis–polycondensation of a bis-silylated diarylimidazolium (Si-IMes-) precursor in the presence of non-ionic triblock copolymer as structure directing agents. Although hydrolysis polycondensation of th…
L-Proline derivatives which are able to form supramolecular gels show an amazing basicity increase in the aggregated (gel) state as compared to solution. As a result they behave as enantioselective catalysts for the aldol reaction in solution but produce a base-catalyzed aldol racemisation in the gel state.
Prussian Blue (PB) mesocrystals have been prepared by a facile hydrothermal method directly. PB nanoparticles aggregate together in an oriented way to form a hierarchical structure.
The ability to design nanoparticles size and shape through the addition of simple and commercially available organic molecules is of particular interest in the catalytic domain because huge amounts of very fine powders are needed. The origin of this effect is all the more difficult to elucidate because the involved in…
The surface of mesoporous silica SBA-15 has been functionalized by the post-synthesis method with new amine dendritic precursors. The synthesis and structural characterization of the new precursors based on poly(propyleneimine) dendrimers have been carried out. Some of the peripheral amine groups of the starting dendr…
In this study, hexagonal boron nitride (h-BN) micromeshes with high crystallinity and yield have been prepared by B2O3, Mg and NaN3 in a stainless steel autoclave at 450 °C, which have diameters of up to 100 µm, thickness of ∼210 nm and pore size of 2.8 µm on average. A near-band edge emission at 217 nm of these micro…
Dissipative particle dynamics (DPD) simulations are employed to study the fusion and fission dynamics of polymeric vesicles formed from amphiphilic triblock copolymers. The amphiphilic molecule is built from two hydrophilic blocks and a hydrophobic middle block. Two different pathways for both fusion and fission proce…
Tip-enhanced Raman scattering (TERS) spectra of a short immobilised peptide on a single transparent gold nanoplate are presented.
The current status and future developments of the use of electron magnetic resonance (EMR) for the investigation of magnetic nano-systems is here reviewed. The aim is to stimulate efforts to provide a unified view of the properties of magnetic nanoparticles (MNP) comprising a few hundred magnetic centres, and molecula…
Co-crystallization alters the molecular interactions and composition of pharmaceutical materials, and is considered better alternatives to optimize drug properties. Co-crystals consists of API and a stoichiometric amount of a pharmaceutically acceptable co-crystal former. Pharmaceutical co-crystals are nonionic supram…
a-Al2O3 is widely used and studied as high temperature structural material, electronic packaging, corrosion resistance ceramicsand translucent ceramics. The surface state of a-Al2O3 powders cannot be regarded as a-Al2O3 but a hydrated state, and that thenature of this hydrate cannot be considered universal among diffe…
Rhizosphere is a site with complex interactions between the root and associated microorganisms and high microbial diversity. Plant growth-promoting rhizobacteria (PGPR) are free-living, root colonizing, soil-borne bacteria exert phytostimulatory actions, when applied to seeds or crops by a combination of physiological…
The Sparkle/PM3 model is extended to europium(III), gadolinium(III), and terbium(III) complexes. The validation procedure was carried out using only high quality crystallographic structures, for a total of ninety-six Eu(III) complexes, seventy Gd(III) complexes, and forty-two Tb(III) complexes. The Sparkle/PM3 unsigne…
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The nanocomposites formed by SO3H-hollow-nanospheres and chiral amines are highly efficient catalysts for the direct asymmetric aldol reaction of cyclohexanone and 4-nitrobenzaldehyde. The catalyst showed 91% yield with 96% ee under optimized reaction conditions. SO3H-hollow-nanospheres were synthesized by oxidation o…
Abstract Silicification of higher plants associated with active, alkali-chloride hot springs in Yellowstone National Park, Wyoming, USA, occurs dominantly in areas of geothermally influenced wetlands. Plants grow in an environment with many of the characteristics of an oligosaline marsh and are subjected to brackish s…
Tungsten oxide nanorod-based electrochromic systems have been developed via a colloidal approach and a highly improved response time and color efficiency have been achieved due to the nanosize effect.
Simultaneous rheological and velocity profile measurements are performed in a smooth Couette geometry on laponite suspensions seeded with glass microspheres and undergoing the shear-induced solid-to-fluid (or yielding) transition. Under these slippery boundary conditions, a rich temporal behaviour is uncovered, in whi…
The study reports the solid state photophysical properties of a series of alkyloxy-substituted oligo(phenyleneethynylene)s, methoxy to hexyloxy, supported by a detailed analysis of molecular packing obtained from single crystal X-ray diffraction data. While the emission peaks are highly red shifted (by as much as 114…
Dendritic phosphole oxides display intense emission in the aggregate and solid states, but no emission in solution, because the intramolecular rotational motions of the peripheral dendritic groups linked to the phosphole oxide core are restricted. This unique spectroscopic feature is ascribed to an aggregation-induced…