Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 950-969 of 1302
-
Article
Selective separation of actinyl(V,VI) cations from aqueous solutions by Chelex-100
(2012)Experimental studies on the selectivity of Chelex-100 resin for the separation of actinide cations at different oxidation states (III, IV, V and VI) from aqueous solution have shown that Chelex-100 presents increased ...
-
Article
Selective separation of radium and uranium from aqueous solutions by Chelex-100
(2012)The affinity of Chelex-100 for radium has been investigated as a function of pH and salinity compared to the Chelex-100 affinity for uranium to assess possible application of the resin for the selective separation of the ...
-
Article
Selective stille coupling reactions of 3-chloro-5-halo(pseudohalo)-4 H -1,2,6-thiadiazin-4-ones
(2011)A series of 3-chloro-5-halo(pseudohalo)-4H-1,2,6-thiadiazin-4-ones (halo/pseudohalo = Br, I, OTf) are prepared from 3,5-dichloro-4H-1,2,6- thiadiazin-4-one (3) in good yields. Of these the triflate reacts with tributyltin ...
-
Article
Self-Assembled Giant Vesicles Formed by Type I [3:3]-Hexakis Adducts of C60 Equipped with Enantiomerically Pure cyclo-Monomalonate Addends
(2015)An efficient route for the synthesis of two amphiphilic type I [3:3]-hexakis adducts of C60 equipped with enantiopure cyclo-monomalonate addends was explored. Studies on their self-assembling behavior by TEM and SEM revealed ...
-
Article
Semi-interpenetrating polymer networks with predefined architecture for metal ion fluorescence monitoring
(2016)The development of new synthetic approaches for the preparation of efficient 3D luminescent chemosensors for transition metal ions receives considerable attention nowadays, owing to the key role of the latter as elements ...
-
Article
Semisegmented amphiphilic polymer conetworks: Synthesis and characterization
(2009)Semisegmented amphiphilic polymer conetworks (APCNs) based on the hydrophilic monomer 2-(dimethylamino)ethyl methacrylate (DMAEMA), the hydrophobic monomer methyl methacrylate (MMA), and the hydrophobic cross-linker ethylene ...
-
Article
Separation of acetylcholinesterase inhibitors using polymeric surfactants in polyelectrolyte multilayer coatings
(2012)The main objective of this study is the use of polymeric surfactants in polyelectrolyte multilayer (PEM) coatings for the separation of the pharmaceutical substances acetylcholinesterase inhibitors (AChEIs). AChEIs are ...
-
Article
Separation of benzodiazepines using capillary electrochromatography
(2004)Benzodiazepines are often used for the treatment of epilepsy, convulsions, and many psychiatric disorders. The widespread use of this class of drugs has occasionally raised concern about recreational benzodiazepine abuse ...
-
Article
-
Article
Shear-induced nanometer and micrometer structural responses in nanocomposite hydrogels
(2010)The structural responses of a polymer-clay nanocomposite hydrogel to an imposed shear field are investigated from the nanometer to the micrometer length scales. The effects of polymer molecular weight and concentration of ...
-
Article
The Shpol'skii system perylene in n-hexane: A computational study of inclusion sites
(2000)We present a combined quantum mechanics/molecular mechanics study of the Shpol'skii system perylene/n-hexane. The system was modeled utilizing a customized pcff-derived force field optimized with a balanced set of optimization ...
-
Article
Silver mediated direct C-H arylation of 3-bromoisothiazole-5-carbonitrile
(2014)Palladium catalyzed direct C-H arylation of 3-bromoisothiazole-5-carbonitrile with aryl/hetaryl iodides in the presence of AgF gave 13 4-aryl/hetaryl-3-bromoisothiazole-5-carbonitriles. The scope of this arylation was ...
-
Article
Silver-mediated palladium-catalyzed direct C-H arylation of 3-bromoisothiazole-4-carbonitrile
(2011)Silver(I) fluoride-mediated Pd-catalyzed C-H direct arylation/ heteroarylation of 3-bromoisothiazole-4-carbonitrile (1a) gives twenty-four 5-aryl/heteroaryl-3-bromoisothiazole-4-carbonitriles. The reaction was partially ...
-
Article
Simple and accurate computations of solvatochromic shifts in π → π* transitions of aromatic chromophores
(2001)A new approach is introduced for calculating the spectral shifts of the most bathochromic π → π * transition of an aromatic chromophore in apolar environments. As an example, perylene in solid and liquid n-alkane matrixes ...
-
Article
A simple failing of G2 theory: Heats of combustion
(1994)G2 theory, which is normally very reliable for the prediction of reaction thermochemistry, is shown to be quite unsuitable for the prediction of heats of combustion. This arises because of significant errors in G2 energies ...
-
Article
Simplified alpha-spectroscopic analysis of uranium in natural waters after its separation by cation-exchange
(2010)A relatively rapid, economic and robust procedure is described for the alpha-radiometric analysis of natural waters. The analysis is performed by alpha-spectroscopy after pre-concentration and separation of uranium by ...
-
Article
Simplified determination of uranium in contaminated sea sand samples by alpha-spectroscopy after acidic desorption and liquid–liquid extraction
(2015)For the determination of uranium in contaminated sea sand samples by alpha-spectroscopy, we have investigated the applicability of different pre-analytical procedures. The direct electrodeposition after acidic dissolution ...
-
Article
A simplified determination of uranium in phosphate rock and phosphogypsum by alpha-spectroscopy after its separation by liquid-extraction
(2012)A relatively rapid, economic and robust procedure is described for the radiometric analysis of uranium in phosphate rock and phosphogypsum. The analysis is performed by alpha spectroscopy after pre-concentration and ...
-
Article
Simultaneous determination of nine acetylcholinesterase inhibitors using micellar electrokinetic chromatography
(2011)MEKC was used for the separation of nine acetylcholinesterase inhibitors (AChEIs). AChEIs are an important group of drug compounds that are used medicinally to treat Alzheimer's disease and Myasthenia Gravis. At the time ...
-
Article