Xerogels and porous materials for specific applications such as catalyst supports, CO2 capture, pollutant adsorption and selective membrane design require fine control of pore structure, which in turn requires improved understanding of the chemistry and physics of growth, aggregation and gelation processes governing nanostructure formation in these materials. We used time-resolved dynamic light...

Multi-component coupling reaction (MCR) is a powerful synthetic tool for the synthesis of biologically active compounds. Development of such multi-component coupling reaction strategies in visible light has been of considerable interest, as they provide simple and rapid access to a large number of organic molecules through a sustainable path. An efficient and green protocol for the synthesis of...

The Front Cover illustrates the straightforward synthesis pathway leading to oxazolidinones like a highway without any curves or obstacles. With just three components, namely primary aliphatic aromatic amines, dibromoethane, and cesium carbonate hydrogencarbonate, variety of can be easily achieved under mild conditions requirement for an additional catalyst base. design by L. Sewald Fehr. More ...

The scope of the current work was to synthesize an S-alkylated 1,2,4-triazole-3-thiol derivative. Synthesis carried out in two steps: first step, 4,5-diphenyl-4H-1,2,4-triazole-3-thiol using a halogenated acetal and cesium carbonate. In second several deprotection procedures were tested, aldehyde obtained isolated as bisulfite adduct. structures new compounds characterized by FT-IR, 1D, 2D NMR ...

The extraction of cesium, strontium, and a number stable components simulated high-level waste solutions from nitric acid media with crown ether derivatives in new fluorinated diluents was studied. Based on the data solubility extractants into aqueous phase physicochemical properties used, most promising systems were chosen: ethers 4,4‘(5’)-di-tert-butyldibenzo-18-crown-6 (L1) 4,4‘(5’)-di-tert-...

Microwave (MW) irradiation is an effective tool in organic reactions that required long reaction times under thermal conditions. Herein substituted 2-iodobenzophenones were transformed into fluoren-9-ones via cesium carbonate and bis(triphenylphosphine) palladium(II) chloride with 56–92% yields within 30–45 min microwave irradiations. A remarkable decrease the time high yield products was obser...

a new cesium ion selective pvc membrane based on parent calix [4] arene was developed for potentiometric determination of cesium in environmental samples. the electrode based on p-5,11,17,23tetra(tertbutyl) 25,26,27,28-tetrahydroxy calix[4]arene(thc) as ionophor ,dibutyl phthalate (dbp)as plasticizer ,sodium tetra phenyl borate(natpb)and oleic acid as lipophilic salt and additive showed the ...

In this review, we discuss the use of time-of-flight secondary-ion mass spectrometry (TOF-SIMS) technology for analyzing viscous glue (is called aggregate droplets) spider orb webs and examine results obtained. Element distribution images droplets were observed by TOF-SIMS. A uniform element is seen suspended pristine droplets, a differential spreading components attached droplets. We also TOF-...