Plant extract of Pulicaria undulata (L.) was used as both reducing agent and stabilizing ligand for the rapid green synthesis gold (Au), silver (Ag), gold-silver (Au-Ag) bimetallic (phase segregated/alloy) nanoparticles (NPs). These with different morphologies were prepared in two hours by stirring corresponding metal precursors aqueous solution plant extracts at ambient temperature. To infer role concentration on composition morphology NPs, we designed sets experiments, namely (i) low (LC)...

The control of the solubility and thermal behavior discotic materials requires a variation substituents. In this study, it has been shown that long alkyl side chains branched at very close vicinity hexa-peri-hexabenzocoronene (HBC) aromatic core results in decrease π interaction between single disks thus significant lowering isotropization temperature but maintains high degree intracolumnar order room temperature, which is usually operating electronic devices. pronounced molecular packing...

Glycine-functionalized copper(<sc>ii</sc>) hydroxide nanoparticles (Gly-Cu(OH)₂NPs) are functional superoxide dismutase mimics.

The self-assembly, the molecular dynamics, and kinetics of structure formation are studied in dipole-functionalized hexabenzocoronene (HBC) derivatives. Dipole substitution destabilizes columnar crystalline phase except for dimethoxy- monoethynyl-substituted HBCs that undergo a reversible transformation to phase. disk dynamics by dielectric spectroscopy site-specific NMR techniques provide both time-scale geometry motion. Application pressure results thermodynamic diagram shows increasing...

Tuning the pseudomorphic transformation of calcium carbonate allows for generation crystal lattice tilting similar to that found in calcareous biominerals.

Complex, reversible hyperbranched graft polymer topologies have been obtained by spontaneous self-assembly. Well-defined adamantyl- and β-cyclodextrin-functionalized polymers were employed to generate linear-g-(linear–hyperbranched) supramolecular terpolymers. For this purpose the synthesis of monoadamantyl-functionalized linear polyglycerols (Ada-linPG) (Ada-hbPG) as well poly(ethylene glycol)-block-linear polyglycerol (Ada-PEG-b-linPG) glycol)-block-hyperbranched poly(glycerol)...

Abstract Mixtures of alkyllithium and heavier alkali‐metal alkoxides are often used to form alkyl compounds alkali metals, but these mixtures also known for their high reactivity in deprotonative metalation reactions. These organometallic called LiC–KOR superbases, despite many efforts constitution remains unknown. Herein we present mixed alkyl/alkoxy produced by reaction neopentyllithium with potassium tert ‐butoxide. The key success was the good solubility temperature‐stability neopentyl...

A general method to carry out the fluorination of metal oxides with poly(tetrafluoroethylene) (PTFE, Teflon) waste by spark plasma sintering (SPS) on a minute scale Teflon is reported. The potential this new approach highlighted following results. i) tantalum oxyfluorides Ta

The molecular dynamics of three dipole functionalized hexa-peri-hexabenzocoronenes have been studied using site-specific NMR techniques and dielectric spectroscopy as a function temperature pressure. These probes (i) suggest that the thermodynamic state completely controls dynamic response, (ii) clarify origin two processes associated with presence glass temperatures, (iii) provide first phase diagram for substances this kind.

ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication the EditorNEXTPoly(γ-benzyl-l-glutamate) Peptides Confined Nanoporous Alumina: Pore Diameter Dependence of Self-Assembly and Segmental DynamicsHatice Duran†, Antonis Gitsas‡, George Floudas*‡§, Mihail Mondeshki†, Martin Steinhart∥, Wolfgang Knoll†View Author Information Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany; Department Physics, University Ioannina, 451 10 Greece; Foundation Research...

Abstract Block copolymers consisting exclusively of a silicon–oxygen backbone are synthesized by sequential anionic ring‐opening polymerization different cyclic siloxane monomers. After formation poly(dimethylsiloxane) (PDMS) block butyllithium‐initiated D3, functional second is generated subsequent addition tetramethyl tetravinyl cyclotetrasiloxane (D4 V ), resulting in diblock comprised simple PDMS and poly(methylvinylsiloxane) (PMVS) block. Polymers varying length ratios were obtained...

This work reports on the experimental investigation of wide band gap compounds LiMgZ (Z = P, As, Sb), which are promising candidates for opto-electronics and anode materials Lithium batteries. The crystallize in cubic (C1_b) MgAgAs structure (space group F-43m). polycrystalline samples were synthesized by solid state reaction methods. X-ray neutron diffraction measurements show a homogeneous, single-phased samples. electronic properties studied using direct current (DC) method. Additionally...

Surface functionalization of nanoparticles (NPs) plays a crucial role in particle solubility and reactivity. It is vital for nucleation growth as well catalysis. This raises the quest efficiency new approaches to probe degree surface coverage. We present an (in situ) proton nuclear magnetic resonance (1H NMR) study on ligand exchange oleylamine by 1-octadecanethiol function size repeated Au NPs. Ligand equilibrium reaction associated with Nernst distribution, which often leads incomplete...

Abstract A protein‐free formation of bone‐like apatite from amorphous precursors through ball‐milling is reported. Mg 2+ ions are crucial to achieve full amorphization CaCO 3 . incorporation generates defects which strongly retard a recrystallization ball‐milled Mg‐doped calcium carbonate (BM‐aMCC), promotes the growth osteoblastic and endothelial cells in simulated body fluid has no effect on cell gene expression. Ex situ snapshots processes revealed reaction mechanisms. For low contents...

Abstract Calcium sulfate is an important construction material. More than 1600 million square meters of interior surfaces are covered with plasterboards in Europe each year. Plasterboard manufactured by transforming mined or recycled gypsum (CaSO 4 × 2 H O) to bassanite ½H a time‐ and energy‐consuming heating process. A fast sustainable way produce solvent‐assisted milling, thereby eliminating the need for energy‐intensive dehydration, described. The milling reaction complete after ≈200 min....

The hierarchical self-assembly at the submicrometer, nanometer and α-helical length scales has been studied in a miktoarm star rod−coil chimera composed of poly(γ-benzyl-l-glutamate) (PBLG), polystyrene, polyisoprene blocks by X-ray scattering, solid state NMR, transmission electron microscopy. propensity rod block toward α-helices that are further hexagonally packed gives rise to pure PBLG domains induces partial mixing two amorphous blocks. These structural results were confirmed...

The stability, persistence and dynamics of the peptide secondary motifs are investigated in a series poly(γ-benzyl-l-glutamate)-b-polyalanine (PBLG-b-PAla) polypeptides through combination structural (X-rays, NMR) dynamic (Dielectric Spectroscopy, probes. unfavorable enthalpic interactions between unlike blocks give rise to nanophase separation that results destabilization PAla β-sheets. Contrary this, overall helicity PBLG α-helices is enhanced. "defected" amorphous segments more ordered...

Amorphous calcium carbonate (ACC) is an important precursor in the biomineralization of crystalline CaCO3. The lifetime transient ACC nature regulated by organic matrix, to use it as intermediate storage buffer or a permanent structural element. relevance material science related our understanding CaCO3 crystallization pathways. can be obtained liquid–liquid phase separation, and typically stabilized with help macromolecules. We have prepared milling calcite planetary ball mill. ball-milled...

Crystallization via metastable phases plays an important role in chemical manufacturing, biomineralization, and protein crystallization, but the kinetic pathways leading from to stable crystalline modifications are not well understood. In particular, fast crystallization of amorphous intermediates makes a detailed characterization challenging. To circumvent this problem, we devised system that allows trapping stabilizing representative carbonates (calcium, strontium, barium, manganese,...

Sustainable composite materials, including carnauba wax, can store energy in the form of latent heat, and containing wax may allow form-stable melting crystallization cycles to be performed. Here, it is shown that molten state abundant nanoclay montmorillonite stable composites with mass ratios 50-70% (w/w). Transmission electron microscopy analysis reveals inhomogeneous distribution matrix. Analyses infrared multinuclear solid-state nuclear magnetic resonance (NMR) spectroscopy prove...

We report on the combined use of fluorescence correlation spectroscopy (FCS) and 1H 13C NMR to detect size type peptide secondary structures in a series poly-Z-l-lysine functionalized polyphenylene dendrimers bearing fluorescent perylenediimide core solution. In dilute solution, molecule as detected from FCS diffusion measurements matches nicely. show that is sensitive probe well change structure. However, less functionality. A conformation β-sheets α-helices by gives rise steep increase...

The thermotropic, structural, and morphological properties of blends a disk-like liquid crystalline phthalocyanine derivative lath-shaped perylenetetracarboxidiimide mesogen have been studied by combining differential scanning calorimetry, thermal polarized optical microscopy, X-ray diffraction, solid-state nuclear magnetic resonance, atomic force microscopy. two compounds are fully miscible for containing at least 60 mol % the molecule. In such composition range, homogeneous form columnar...

The polymerization of alkoxy-substituted [2.2]paracyclophane-1,9-dienes via ring-opening metathesis (ROMP) to obtain soluble poly(p-phenylenevinylene)s is a versatile method due its living nature which enables the possibility block copolymerization and end group modification. However, detailed studies on reactivity behavior process have not been reported so far. Herein we present study varying tendencies four isomers dimethoxy-(2-ethylhexyloxy)-[2.2]paracyclophane-1,9-diene undergo ROMP....