Magnetically-assisted chemical separation/preconcentration method for the analysis of beryllium from aqueous solutions was developed. According to this method several extractants were coated on certain magnetic microparticles to assist the extraction of beryllium from the aqueous solutions. The ...

Composite propellant based on hydroxyl-terminated polybutadiene and ammonium perchlorate (AP) has become the workhorse propellant for modern-day missiles and space vehicles. AP is the main ingredient and is used as an oxidizer in composite propellant and accounts for approximately 70%–80% of th...

New organometallic chemosensors which are based on triad molecules, ferrocenyl naphthoquinone linearly/angularly fused crown ethers (Fc–cnq–1a and Fc–cnq–1b) bearing ferrocene, quinone, and crown ether functional groups together, were synthesized and utilized for selective sensing trace amou...

One of the main goals for the scientific/ military rocket industry is to increase the operational burning time, thus the specific impulse. New homogeneous and heterogeneous propellants were tested and metallic fuels were added in the mixture to obtain best performance. To study heterogeneous pro...

Anion recognition by 1,3-disiloxane-1,1,3,3-tetraols has been elucidated by 1H NMR titrations and ESI-MS in organic solvents. The association constants of the receptors for halide anions are larger than those of silanediol and 1,3-disiloxane-1,3-diol due to the cooperative hydrogen bonds by four...

Vapor-liquid equilibrium data of hexamethyl disiloxane + sec-butyl acetate system at 101.3 kPa was measured by using double circulating vapor-liquid equilibrium still. The thermodynamic consistency of the VLE data was examined by Herrington method. Experimental data was correlated by NRTL and UN...

Symmetrical disiloxanes were prepared in high yields by air oxidation of mono, di, and trihydrosilanes under Lewis acid catalysis.

The first representative imidazolophanes bearing dimethylene(tetramethyl)disiloxane spacers were synthesized in one preparative stage by the reaction between imidazoles and 1,3-bis(iodomethyl)-1,1,3,3-tetramethyldisiloxane.

1,3-Dimethyl- or 1,3-divinyl-1,3-di-t-butoxydisiloxane-1,3-diol and 1,3-diphenyldisiloxane-1,1,3,3-tetraol were synthesized by hydrolysis of the corresponding diisocyanatodisiloxanes and tetrachlorodisiloxane. The disiloxanediols were soluble in common organic solvents and thermally very stable,...

Functionalized disiloxane compounds were synthesized by attaching oligo(ethylene glycol) chains, –(CH2CH2O)–n, n = 2–7, via hydrosilation, dehydrocoupling, and nucleophilic substitution reactions and were examined as non-aqueous electrolyte solvents in lithium-ion cells. The compounds were fu...

Liquid disiloxanes functionalized with terminal nitrile groups are introduced as alternative non-volatile solvents for lithium-ion battery electrolytes in combination with LiTFSI as lithium salt. Two series of disiloxanes were investigated differing with respect to the attachment of the nitrile ...

The lithium-sulfur battery is a leading candidate for a new-generation Li-ion battery, because of its high theoretical capacity and abundance of sulfur. Yet, the flammability of either the organic-carbonate or ether-based electrolytes used in such battery systems is of concern. Moreover, the oxi...

We report here an efficient non-aqueous route to symmetrical disiloxanes from their corresponding organosilanes using Ni(COD)2 with 3,4,7,8-tetramethyl-1,10-phenanthroline in air. Our methodology is very simple and high yielding. The reaction mechanism is also proposed.

Hirshfeld surfaces and two-dimensional fingerprint plots are used to study short intermolecular contacts in new organotin(IV)-phosphoramide complexes, (L1)2Cl2Me2Sn (1), (L2)Cl2Me2Sn (2) and (L3)2Cl2Me2Sn (3) [L1 = (C5H9NH)3PO, L2 = [(CH3)3CNH][C6H5CH2N(CH3)]2PO and L3 = (3-F-C6H4C(O)NH)(N(CH3)C...

A series of Glutaryl-Hyp-Ala-Ser-Chg-Gln-4-aminobenzyl phosphoramide mustard conjugates (1a–e) was designed and synthesized as potential prodrugs for site-specific activation by PSA in prostate cancer cells. All conjugates were found to be substrates of PSA with cleavage occurring between Gln a...

A series of nitrobenzyl phosphoramide mustards and their analogs was designed and synthesized to explore their structure–activity relationships as substrates of nitroreductases from Escherichia coli and trypanosomes and as potential antiproliferative and antiparasitic agents. The position of th...

New nanocomposite films of chitosan/phosphoramide/1–5% Fe3O4 NPs were prepared. The Fe3O4 NPs were synthesized as core–shell NPs with starch as a capping agent. The phosphoramide compound was synthesized from the reaction of morpholine with N-4-nitrophenyl phosphoramidic dichloride. The XRD an...

Flame retardant cotton fibers were successfully produced using five new nanosized phosphoramide compounds synthesized by ultrasonic method. The 1H NMR spectra of compounds 1–3 illustrate 3J(H,H)cis and 3J(H,H)trans corresponding to the splittings of cis and trans protons present in the CHCH2 bo...

We report on a novel phosphoramide complex with formula Cu(NO3)2([C5H10N]3PO)2. This complex is the first example of a copper monomeric phosphoric triamide having an octahedral Cu[O]6 coordination environment. Cu(NO3)2([C5H10N]3PO)2 crystallizes in the monoclinic space group P21/n with the Cu at...

The structural and electronic characteristics of some phosphoramide derivatives with the general formula 4-X-C6H4-C(O)-NH-P(O)(OCH3)2 where X = H, F, Cl, Br, CH3, CF3, CCl3 and CBr3 as well as their H-bonded structures with HCl were investigated for application as corrosion inhibitors using dens...