Materials Literature
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Engineered nanomaterials represent a new and expanding class of chemicals whose environmental hazard is actually poorly determined. The peculiar behavior of nanomaterials makes them much more similar to new chemicals than to the corresponding bulk materials; this feature imposes reliable and standardized evaluation pr…
The several factors that render certain kinds of nanoporous oxidic solids valuable for the design of a wide range of new heterogeneous catalysts are outlined and exemplified. These factors include: (i), their relative ease of preparation, when both mesoporous siliceous frameworks (ca. 20 to 250 A diameter pores) and m…
In this study a new type of honeycomb-patterned micro-porous polyester fibre was used to develop good moisture absorption and quick drying properties of woven fabrics. Details of the development and after-finish processes of the fabrics were illustrated. The water transport, vapour transmission and quick dry propertie…
We report a synthetic strategy that allows us to manipulate the interfacial region between blocks and control ordering transitions in poly(isoprene-b-styrene) [P(I-S)] block copolymers. This interfacial modification is accomplished by combining a semi-batch feed with anionic polymerization techniques. Using this appro…
Glutathione peroxidase (GPx) is a key antioxidant enzyme involved in scavenging of reactive oxygen species and protects cells from oxidative damage. Consequently many efforts have been devoted to develop artificial catalysts with GPx functions. For constructing a smart GPx model, GPx active sites were introduced into…
The chirally functionalized periodic mesoporous organosilica (PMO) with C2-symmetric chiral building blocks, BINAP (2,2′-bis(diphenylphosphino)-1,1′-binaphthyl), in the pore wall was successfully synthesized for the first time using a successive co-condensation and post-synthesis modification method. Chiral BINAPO (2,…
Many challenges remain in the effort to realize the exceptional mechanical and electrical properties of carbon nanotubes in composite materials. Here, we report on highly electrically conductive and mechanically stiff composites of polymers and single-walled carbon nanotubes (SWNT). Conductive SWNT-based nanofoams (ae…
A new polymeric approach, based on cyanocarbanion ligands, for the design of spin crossover (SCO) compounds led us to the compound [Fe(abpt)(2)(tcpd)] () (tcpd(2-) = (C[C(CN)(2)](3))(2-), abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) which has been characterised as the first SCO molecular chain involving a cyan…
In this work we demonstrate the use of nanocomposite thin films of poly(vinyl alcohol) with embedded silver NPs for chemosensing purposes. Silver NPs are in situ synthesized inside polyvinyl alcohol during the bake step of the formation of a nanocomposite thin film. The polymer in the nanocomposite provides an appropr…
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…