Remarkably improved complexation of a bisparaquat by formation of a pseudocryptand-based [3]pseudorotaxane
Significant improvement of complexation of a bisparaquat guest was achieved by the formation of a pseudocryptand-based [3]pseudorotaxane.
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Design, Fabrication, and Evaluation of a 1.5 F and 5 V Prototype of Solid-State Electrochemical Supercapacitor
The scale-up from a small single cell to a larger stack prototype of a solid-state electrochemical supercapacitor based on polymer electrolyte and activated carbon is demonstrated. The prototype is composed of five single cells stacked in series, has a nominal capacitance of 1.5 F, and a maximum voltage of 5 V. The el…
Binuclear complexes as tectons in designing supramolecular solid-state architectures
Abstract Oligonuclear complexes as well as coordination polymers with various network topologies can be obtained by using homo- or heterobinuclear complexes as starting materials. These building blocks are stable complexes, where the metal ions are held together by compartmental ligands, or alkoxo-bridged Cu(II) speci…
Generation effects on the microstructure and product distribution in ethylene polymerization promoted by dendritic nickel catalysts
Carbosilane dendrimers Gn-[(ONNMe2)NiBr2]m, containing up to sixteen terminal pyridylimine nickel complexes, have been studied as catalysts for polymerization of ethylene; the microstructure and the oligomer/polymer distribution are significantly affected by the generation of the dendritic precursor.
Physicochemical Properties of Silk Fibroin after Solubilization Using Calcium Chloride with or without Ethanol
To elucidate the physicochemical properties of silk protein, we studied the effects of calcium chloride and ethanol on the gelation of fibroin. Fibroin was treated with 5.0M calcium chloride in water (Ca/W) or 5.0M calcium chloride in 20% (v/v) ethanol (Ca/Et) and the rheological properties of colloidal fibroin were i…
Spin polarization and annihilation for radicals and diradicals
Abstract The extent of spin polarization in unrestricted Hartree–Fock and density functional B3LYP calculations has been determined for a few monoradicals as well as the corresponding diradicals containing these monoradicals as functional groups. Simple relations are found that explain the very high value for the aver…
Non-ionic polythiophenes: a non-aggregating folded structure in water
The non-aggregating nature of a water-soluble pi-conjugated polythiophene has been characterised by concentration independent thermal denaturing.
Structural and Luminescence Properties of Gd[sub 2]O[sub 3]:Eu[sup 3+] and Y[sub 3]Al[sub 5]O[sub 12]:Ce[sup 3+] Phosphor Particles Synthesized via Aerosol
Opportunities for the synthesis of ultrafine spherical particles with uniformly distributed components and phases are of special importance when materials for photonic application are considered.In this study, the nanophase, spherical, luminescent polycrystalline Gd 2 O 3 :Eu and YAG:Ce particles were synthesized from…
Bismuth-Ruthenate-Based Cathodes for IT-SOFCs
New cathode materials with high performance are required to realize efficient solid oxide fuel cells (SOFCs) operating at intermediate temperatures (IT) of 500-700°C. Bismuth ruthenate is known to be catalytically active toward oxygen reduction and to have high electronic conductivity in the temperature range of inter…
Lanthanide complexes of macrocyclic derivatives useful for medical applications
Abstract The protonation constants of two series of tetraazamacrocyclic ligands with acetate and methylphosphonate pendant arms, as well as their stability constants with Cu 2+ , La 3+ , Sm 3+ , and Ho 3+ , were determined. All the values were determined in aqueous solution at 298.0 K and 0.10 mol dm –3 in N(CH 3 ) 4…
High-field EPR investigations of MnIIIMnIV and MnIIMnIII states of dimanganese catalase and related model systems
Multi-frequency EPR experiments at 9, 34 and 94 GHz are reported on the antiferromagnetically coupled mixed valence Mn(II)Mn(III) complex of manganese catalase and on several dinuclear manganese model systems. They are compared with similar experiments obtained earlier for the Mn(III)Mn(IV) states. It is demonstrated…
Periodicity and Uniqueness of Global Minimizers of an Energy Functional Containing a Long-Range Interaction
We consider, on an interval of arbitrary length, global minimizers of a class of energy functionals containing a small parameter $\varepsilon$ and a long-range interaction. Such functionals arise from models for phase separation in diblock copolymers and from stationary solutions of FitzHugh--Nagumo systems. We show t…
Visible light-induced selective oxidation of cyclohexane to cyclohexanone on Cr–Si binary oxide with molecular oxygen
Cr-Si binary oxide prepared by a sol-gel method, when activated by visible light, catalyses highly selective oxidation of cyclohexane to cyclohexanone with molecular oxygen.
Application of fluorescence recovery after photobleaching to diffusion of a polyelectrolyte in a multilayer film
The diffusion coefficient, D, and the proportion of mobile molecules, p, is measured for a fluorescently labeled polyelectrolyte in a multilayer film using fluorescence recovery after photobleaching (FRAP). The film was composed of poly(L-lysine) (PLL) and hyaluronan (HA). The labeled polyelectrolyte (PLL(FITC)) was e…
Silver organosol: synthesis, characterisation and localised surface plasmon resonance study
In this article a simple and reproducible technique for the synthesis of a silver organosol is reported from a specific silver precursor, solid silver acetate. Molten hexadecylamine acts as a solvent for silver acetate and imparts stability to the evolved nanoparticles. The amine-capped organosol shows unique stabilit…
Spintronics device concepts
Spin-dependent phenomena in semiconductors may lead to devices with new or enhanced functionality, such as polarised solid-state light sources (spin light-emitting diodes), novel microprocessors and sensitive biological and chemical sensors. The realisation of robust semiconductor spin-device technology requires the a…
Multifunctional metal oxide based nanoobjects: spherical porous capsules/artificial cells and wheel-shaped species with unprecedented materials properties
Spherical and wheel-shaped molybdenum oxide based nanosized clusters exhibit unprecedented materials properties, due to the large number of active sites/functionalities on their outer and innermost surfaces, especially with respect to specific interactions with their environment.
Hydrophilic conditions: a new way for self-assembly of hybrid silica containing long alkylene chains
For the first time, hybrid materials with long-range order (lamellar and even 2D hexagonal) were obtained during hydrolysis–polycondensation of α,ω-bis(trimethoxysilyl)alkanes thanks to hydrophobic van-der-Waals type interactions using highly hydrophilic conditions, the nanostructure depending mainly on the alkylene c…
Supramolecular chirality control by solvent changes. Solvodichroic effect on chiral porphyrin aggregation
The mode of aggregation of amphiphilised porphyrin derivatives bearing a chiral functionality is strongly affected by solvent composition; this results in the tuning of the supramolecular chirality of the porphyrin aggregates.
The Ru(ii)-supported heptatungstates [HXW7O28Ru(dmso)3]6–(X = P, As)
The ruthenium(II)-supported heteropolyanions [HXW7O28Ru(dmso)3]6-(X=P, 1; As, 2) are composed of a Ru(dmso)3 group attached to an unprecedented heptatungstate fragment via two Ru-O-W bonds and one Ru-O-X bond, which represents a fundamentally novel mode of Ru-coordination to a polyoxoanion framework. Multinuclear 183W…