Materials Literature
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Two novel fluorene-trimers were synthesised following a Suzuki-type cross-coupling reaction. Methyl pendant chains in 9-position of the fluorene building blocks ensured a rod-like backbone of a small molecular diameter while the introduction of terminal, flexible n-octyl and n-hexadecyl alkyl chains in the 2- and 7″-p…
The synthesis and characterization is reported of a novel discotic side group polymer based on a predominantly poly(ethylene oxide) backbone to which are attached triphenylene-based mesogenic groups via flexible spacers. The thermal and mechanical behavior of this polymer and its complex with lithium perchlorate are c…
Abstract Schottky contacts were fabricated on composites of high molecular weight polyaniline and pristine multiwalled carbon nanotubes. Physical and electrical characteristics of these organic composite materials were studied by using atomic force microscopy (AFM), scanning electron microscopy (SEM), and electrical m…
A novel methodology for preparation of linear oligopyrroles is presented. Synthetic protocol uses water as a solvent for acid catalysed condensation of an aldehyde or ketone with unsubstituted pyrrole. While the most procedures for the above-mentioned compounds are performed in organic solvents, or large excess of pyr…
A biotinylated Gd-DTPA complex is designed to study the biotin-avidin complexation using the longitudinal relaxivity of this new MRI label, which illustrates the use of MRI contrast agents to probe the formation of supramolecular assemblies in water.
Both intercalated and exfoliated poly(L‐lactide) (PLA) layered aluminosilicate nanocomposites were synthesized and characterized in terms of barrier properties. Intercalated polylactide/montmorillonite nanocomposites were obtained by melt blending PLA and a montmorillonite modified with bis‐(2‐hydroxyethyl)methyl (tal…
Foamed bitumens were obtained by injecting water into hot bitumen using the Foamlab apparatus from SAE (Fayat Group). Three bitumens were studied and the volume of foam obtained under fixed conditions of bitumen temperature and water content, was quantified through the maximum expansion ratio ERm. This parameter reach…
Optimal in vitro conditions are necessary for the development of a strong, well structured, and functional tissue engineered cardiovascular structure eventually designed for implantation. To further optimize in vitro conditions for cell proliferation and extracellular matrix formation in tissue engineering of cardiova…
Grinding a 1 : 1 enantiomeric mixture of chiral transition metal complex crystals and subsequent annealing afforded crystals of a racemic compound by diffusion and rearrangement of component molecules, without melting and without racemization of each enantiomeric species.
We developed novel positive-tone photosensitive polyimide coatings for insulation layers in organic light emitting diode (OLED) displays. We evaluated the features of the novel coatings in comparison to other candidate polymers including novolak resin, acrylic resin, and polybenzoxazole. After curing, the novel coatin…
In the present contribution we report on a novel route to synthesize 2D-polyaniline (2D-PAN) on sulfonated-poly(styrene) (SPS) templates by allowing first monomer assembly followed by chemical oxidation to achieve polymerization. We show that Aplysia neurons grown on 2D-PAN exhibit an unusual growth pattern and adhesi…
An ultra low carbon interstitial free (IF) steel was severely deformed by the six-layer stack accumulative roll-bonding (ARB) process for improvement of the mechanical properties. As-received material with 1 mm in thickness showed a recrystallization structure with average grain diameter of 27 μm. The ARB was conducte…
Periploca sepium (PS) has traditionally been used in oriental medicine for treatment of rheumatoid arthritis (RA). We investigated the aqueous extract of PS (PSE) in its effects on human rheumatoid arthritis-derived fibroblast-like cells. In cell culture studies, PSE inhibited the growth and IL-6 production of the cel…
The electronic properties of cationic ferric complexes were investigated in molecular materials and in a negatively charged lamellar host matrix. Two cations, [FeIII(R-Sal2Trien)]+ [where H2-R-Sal2Trien is the hexadentate ligand derived from triethylenetetramine and R-substituted salicylaldehydes (R = 3,5-Cl2 or 5-OMe…
Highly ordered mesoporous titania films were synthesized within a short time period by controlling the pH of sols and moisture exposure of as-prepared films.
The magnetic oxides NaFeP(2)O(7) and LiFeP(2)O(7), made up of FeO(6) octahedra containing high-spin Fe(3+)(d(5)) ions, undergo a three-dimensional antiferromagnetic ordering at low temperatures. The strengths of various Fe-O...O-Fe super-superexchange interactions of NaFeP(2)O(7) and LiFeP(2)O(7) were estimated on the…
We hereby describe a novel example of light driven phase transitions in a photoresponsive dimesogen, which goes through different pathways at different temperatures. The isomer ratios required to obtain the phase transition in each case have also been determined.
A new concept of microstructural designing of polymer-free polycrystalline composite materials is offered. The concept based on controllable substitution during composite formation of separate crystallites making a polycrystal by pores, crystallites with other composition and/or structure or amorphous substances with…
The reaction of Mn(acac)3 with 3 eq. of Al(OiPr)3 in toluene at reflux provided with minor yield single crystals of MnAl2(acac)3(OiPr)4(OAc)(C7H8)0.5 (1), incorporating into the molecular structure the acetate ligand originating from oxidation of the OiPr-groups. 1 was obtained with high yield (76%) via the reaction o…
Characteristics of dimethyl ether oxidation and formaldehyde formation with NO X reduction catalysts were investigated in comparison with noble metal catalysts. The catalysts used in this research were Co and Sn as NO X catalysts and Pt, Pd, Rh as noble metal catalysts. Moreover, all the catalysts were loaded with gam…