نتایج جستجو برای: co solvent
تعداد نتایج: 384677 فیلتر نتایج به سال:
Front Cover: A block copolymer containing UV-addressable benzophenone moieties within the hydrophobic is synthesized via atom transfer radical polymerization (ATRP). The utilized in a self-assembly non-solvent induced phase separation process to obtain an integral asymmetric membrane, which can be stabilized upon UV- irradiation revealing enhanced solvent and pressure resistance. This work feat...
In this paper we report the determination of partitioning of coalescing agents (organic co-solvents) in water-borne latex emulsions by means of a fluorescence method. An environment-sensitive fluorescent probe was copolymerized via emulsion polymerization. The presence of organic co-solvents inside the polymer particles is revealed by the photophysical properties of the probe. In particular, th...
Aerobic reactions of Co(O(2)CMe)(2).4H(2)O with di-2-pyridyl ketone oxime (Hpko) in the presence of counterions (ClO(4)(-), PF(6-)) give the tetranuclear, mixed-valence cobalt(II/III) clusters [Co(II)(2)Co(III)(2)(OR)(2)(O(2)CMe)(2)(pko)(4)S(2)]X(2) [R = H, S = MeOH, X = ClO(4) (1); R = Me, S = EtOH, X = PF(6) (2)] depending on the solvent mixture. Complexes 1 and 2 are the first Co members in ...
Introduction: Mixed solvency is a concept of solubilization of the material. For producing new formulation, especially in the form of injection it is essential to solubilize the active pharmaceutical ingredients (API) in the solvent and that must be stable throughout the shelf life. Aqueous solubility of raw materials is important for injection formulation, but in some cases if the drug is not ...
Co₃O₄ nanorods were prepared by a facile hydrothermal method. Eco-friendly deionized water rather than organic solvent was used as the hydrothermal media. The as-prepared Co₃O₄ nanorods are composed of many nanoparticles of 30-50 nm in diameter, forming a finger-like morphology. The Co₃O₄ electrode shows a specific capacitance of 265 F g-1 at 2 mV s-1 in a supercapacitor and delivers an initial...
Supercritical fluid CO 2 is an alternative solvent for extraction of metals. The solubility parameter of supercritical CO 2 varies with density resembling that of liquid hexane at moderate pressures in the supercritical region to those of chlorinated solvents at very high pressures. By changing density of supercritical CO 2 , the solvation environment of a metal chelate system can vary continuo...
The title complex, {[Co2(C18H4O10)(C14H14N4)2]·2H2O} n was synthesized from CoCl2·6H2O, 9,10-dioxo-9,10-dihydro-anthracene-1,4,5,8-tetra-carb-oxy-lic acid (H4AQTC) and 1,2-bis-[(1H-imidazol-1-yl)meth-yl]benzene (o-bix) in water. The anthraquinone unit is located about a crystallographic center of inversion. Each asymmetric unit therefore contains one Co(II) atom and one o-bix ligand, as well as...
Directed co-assembly of polymer-conjugated cyclic peptide nanotubes (CPNs) and block copolymers in thin films is a viable approach to fabricate sub-nanometer porous membranes without synthesizing nanotubes with identical length and vertical alignment. Here we show that the process is pathway dependent and successful co-assembly requires eliminating CPNs larger than 100 nm in solution. Optimizin...
Polymethylmethacrylate (PMMA) is a material of choice for many biomedical coating applications. However, such applications are limited due to the toxicity traditional solvents used solution processing PMMA coatings and composites. This problem addressed using an isopropanol-water co-solvent, which allows dissolution high molecular mass fabrication by dip-coating method from concentrated solutio...
Tissue engineering utilizes cells and synthetic matrices to create new tissues. Living cells are anchorage dependent and will die if they are not provided with an adhesion substrate. Man-made scaffolds are designed to provide a structural framework for the selected cells and to facilitate the formation of new tissues. Matrix structure of the scaffold should be connective together with high poro...
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