Materials Literature
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This work describes how a new, extremely porous, hairy layer of carbon nano-fibers (CNFs) can be prepared on the surface of porous inorganic bodies, e.g. wash-coated monoliths. CNFs were prepared catalytically by methane and ethene decomposition over a Ni catalyst. The influence of the Ni particle size and growth cond…
[Ln[N(SiMe3)2]2(THF)2](Ln = Sm, Yb) reacts with 1 equiv. of carbon-bridged biphenols, 2,2'-methylene-bis(6-tert-butyl-4-methylphenol)(L1H2) or 2,2'-ethylidene-bis(4,6-di-tert-butylphenol)(L2H2), in toluene to give the novel aryloxide lanthanide(II) complexes [[LnL1(THF)n]2](Ln = Sm, n = 3 (1); Ln = Yb, n = 2 (2)) and…
Synthesis of calcium carbonate in water-in-oil microemulsions results in the spontaneous formation of stacked superstructures of 20 nm-thick pseudo-hexagonal calcite plates in crystallographic register.
The influence of small amounts (∼2 μg/cm 2 ) of deposited NaCl on the initial atmospheric corrosion of iron has been investigated in situ at varying relative humidities. The deliquescence of the NaCl crystallites and corrosion product formation was followed at relative humidities ⩾75% with quartz crystal microbalance…
Triangular [Cu(II)3Cl] clusters, containing a chloro ligand in an unprecedented trigonal planar coordination mode, are assembled in a 3-D array by the combination of coordinative and hydrogen-bonded interactions, which result in magnetically isolated 1-D chains exhibiting a combination of spin frustration and spin-cha…
Abstract The photodynamic activities of novel asymmetrically meso-substituted cationic porphyrins, 5,10-di(4-methylphenyl)-15,20-di(4-trimethylammoniumphenyl)porphyrin iodide 1 and 5-(4-trifluorophenyl)-10,15,20-tris(4-trimethylammoniumphenyl)porphyrin iodide 2 and its metal complex with Pd(II) 3, have been investigat…
Three-dimensionally long range ordered macroporous SiC ceramics were prepared using a low molecular weight polymer precursor, polymethylsilane (PMS), by utilizing sacrificial colloidal silica crystalline arrays as templates which were subsequently etched off with HF (45%) after pyrolysis in an argon atmosphere. SEM, T…
Guest specific solid-state fluorescence enhancement in 2,7-bis-(3-hydroxy-3,3-diphenylprop-1-ynyl)fluoren-9-one host:guest complexes may be ascribed to changes in the packing modes and hence host–host intermolecular interactions leading to excimer formation in the solid-state and the occurrence (or lack thereof) of sp…
Superhydrophobic silica aerogels are obtained by surface modification of standard silica gels prepared by a two-step process with a heavily fluorinated silyl chloride followed by supercritical evacuation of the solvent.
The use of 11-aminoundecanoic acid as a synthetic building-block allows the systematic preparation of (oligo)amide organogelators-including chiral ones-which display remarkable gelation properties in organic solvents and water.
Higher-order porous calcite microspheres exhibiting high specific surface areas, unusual morphologies and textures were fabricated by a simple precipitation reaction of CaCO3 in the presence of PSMA as a crystal modifier.
An N-fused porphyrin rhenium complex was synthesized by the thermal reaction of an N-confused porphyrin with Re2(CO)10 and its structure was determined by X-ray crystallographic analysis.
Reaction of NH(PiPr2)2 with elemental selenium in concentrated solvent conditions enables large scale preparation and improved yields of NH(PSeiPr2)2 that may be deprotonated with sodium methoxide to give NaN(PSeiPr2)2. Treatment of the sodium salt with appropriate Group 11 metal salts in methanol yields a range of tr…
The interaction of a series of free base meso-tetraarylporphyrins (arylpor) and meso-tetraalkylporphyrins (alkylpor) with BF3·Et2O, with different molar ratios (<1∶1 to >1∶2) in chloroform, immediately and exclusively yielded the 1∶2 adducts (BF3)2por. The close spectral correlation between the corresponding (BF3)2por…
A new mesostructured hybrid organic–inorganic silica host with internal anchored acetylacetonate groups has been used as a matrix for the growing and organization of Fe3O4 nanoparticles. The approach used consists in the impregnation and the subsequent organic solution-phase decomposition of the molecular precursor Fe…
An amphiphilic zinc porphyrin-fullerene dyad appended with triethyleneglycol chains in aqueous media forms uniformly-sized multilamellar vesicles with a mean diameter of 100 nm that are thermally stable and robust against membrane lysis with surfactants.
Potassium hexaniobate nanotubes have been fabricated from polycrystalline K4Nb6O17 at room temperature using the intercalating and exfoliating methods. These tubular materials were mainly characterized by using electron microscopy. Their structures were found to be multilayer crystalline nanotubes with interlayer spac…
Three novel Pb(II) coordination complexes, [Pb(dimb)(DMF)(NO3)2]n1, [Pb(dimb)(SCN)2]n2 [dimb = 1,3-bis(imidazol-1-ylmethyl)-benzene], {[Pb(bimb)1.5(NO3)2](DMF)}n3 [bimb = 4,4′-bis(imidazol-1-methyl)-biphenyl], were synthesized and characterized by X-ray crystallography. Complex 1 exhibits a one-dimensional (1D) zigzag…
Ferroelectric liquid crystalline phases formed by achiral bent-core mesogens have been known for about seven years. However, only few materials have been found to exhibit both conventional nematic/smectic mesophases and “banana” phases, where steric packing of bent mesogens results in ferroelectric properties. In this…
Hybrid inorganic/organic composite materials composed of gold nanoparticles of varying size (1.5 and 6.8 nm) and polyhedral oligomeric silsesquioxane (POSS) units were created using electrostatic self-assembly. Carboxylic acid-functionalized mixed monolayer protected gold clusters (MMPCs) were mixed with trimethyl qua…