Materials Literature
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The photodynamic activities of a porphyrin-C60 dyad (P-C60) and its metal complex with Zn(II) (ZnP-C60) were compared with 5-(4-acetamidophenyl)-10,15,20-tris(4-methoxyphenyl)porphyrin (P), both in homogeneous medium-bearing photooxidizable substrates and in vitro on the Hep-2-human-larynx-carcinoma cell line. This st…
The incorporation of thioether groups in the structure of a Mn12 single-molecule magnet, [Mn12(O12)(L)16(H2O)4] with L = 4-(methylthio)benzoate, is a successful route to the deposition of well-separated clusters on native gold surfaces and to the addressing of individual molecules by scanning tunnelling microscopy.
Bifunctional periodic mesoporous organosilicas with large heterocyclic bridging groups and mercaptopropyl surface ligands located on the pore walls are reported. These materials were synthesized by co-condensation of tris[3-(trimethoxysilyl)propyl]isocyanurate, 3-mercaptopropyltrimethoxysilane and tetraethyl orthosili…
The oxygen reduction reaction (ORR) was experimentally investigated using the Koutecky-Levich approach on AA2024-T3, high-purity aluminum, and high-purity copper. The ORR on a heterogeneous AA2024-T3 electrode exhibited charge-transfer, mixed, and mass-transfer-controlled regimes that were successfully modeled in each…
A novel surfactant-encapsulated terbium-substituted heteropolyoxotungstate complex [L1]13[Tb(SiW11O39)2].30H2O (SEC-1) bearing mesomorphous groups was successfully prepared by the ionic self-assembling route, exhibiting characteristic thermotropic liquid-crystalline behavior.
In the rapidly growing field of tissue engineering, the functional properties of tissue substitutes are recognized as being of the utmost importance. The present study was designed to evaluate the effects of static mechanical forces on the functionality of the produced tissue constructs. Living tissue sheets reconstru…
This article deals with the aspects of interfacial and surface characterization of natural fibers and their composites. Vegetable fibers and their composites have attracted the attention of scientists worldwide because of their favorable properties. The different chemical modifications of natural fibers and characteri…
This article is focused on mesoporous hybrid organic–inorganic materials prepared in the presence of structure-directing agents. We attempt to show that they are currently the best supports for exploring polyfunctional materials, which can provide a route to interactive materials. We define interactive materials as na…
also serve as a basis for advanced study or specialized investigation of the theory and practice of the unit operations and unit processes covered.
Rehydration of Mg-Al hydrotalcite in the liquid phase using ultrasounds or a high stirring speed leads to nanoplatelets with surface areas of 400 m(2) g(-1), displaying catalytic activities in aldol condensations up to 8 times higher than the best catalytic system reported in the literature.
Calix[4]arene derivatives supported on monolayer protected gold clusters show a remarkable enhanced binding efficiency towards quaternary ammonium salts in homogeneous solution of apolar solvents with respect to the corresponding unsupported hosts.
Anisotropy and temperature dependence upon the Young’s Modulus of Ti–24 mol %Nb–3 mol %Al (TiNbAl), a new biomedical shape memory alloy, were characterized in the temperature range from 133 to 413 K by dynamic mechanical analysis in the tensile mode. The material consisted of β-phase (the parent phase, bcc) at room te…
The latex of the plant Calotropis procera has been reported to exhibit potent antiinflammatory activity against carrageenin and formalin that are known to release various mediators. In the present study, we have evaluated the efficacy of extracts prepared from the latex of C procera against inflammation induced by his…
Doubly-dendronized polymers were synthesized by grafting polybenzyl ether dendrons onto a poly(hydroxy) styrene polymer with polyaliphatic esters.
Highly luminescent water-soluble CdTe nanowires synthesized in one step were used to detect copper(II) selectively below 0.078 microM in the presence of other physiologically relevant cations.
An all-purpose approach to immobilize ionic liquids onto solid supports is proposed by chemical grafting on a polyelectrolyte carrier.
Organic–inorganic hybrids incorporating Eu(nta)3·bpy (where nta and bpy stand for 1-(2-naphthyl)-4,4,4-trifluoro-1,3-butanedionate and 2,2′-bipyridine, respectively) were prepared either by acetic acid solvolysis or a conventional hydrolysis sol–gel route. The host framework of these materials, classed as di-ureasil,…
The use of organometallic precursors allows the synthesis in mild conditions of metal nanoparticles displaying a controlled size, shape and surface environment. This method has been extended to the synthesis of bimetallic magnetic nanoparticles of controlled anisotropy and of semi-conducting oxides. We have furthermor…
Single-walled carbon nanotubes (SWNTs) formed gels after being ground with a room-temperature ionic liquid (RTIL). The gels were used as electrodes of electric double-layer capacitors (EDLCs), and the RTIL was used as the electrolyte. The performance of the EDLCs was examined by charge-discharge experiments and was co…
A highly stable porphyrin-fullerene conjugate with defined distance and orientation, was formed using a newly developed 'two-point' binding strategy involving axial-coordination and cation-crown ether complexation; photochemical studies performed in benzonitrile revealed efficient charge separation and slow charge-rec…