Ag-TiO2 nanocomposite with the optimum concentration of 1wt% was produced by a sol-gel process using Rhodamine B for the catalytic activity. The initial samples were prepared by heat treatment at various temperatures (266, 338, 390, 485, 600 and 700°C) with a holding time of 2 h. DTA and XRD of these samples led to choosing the temperature of 530°C as the heat treatment temperature. Then some s...

Weak intermolecular interactions play a major role in structure formation of molecular crystals. Trimethoxy(1-naphthyl)silane (1), the first one-component single-crystalline trimethoxysilane, was analyzed by single-crystal X-ray diffraction. were studied Hirshfeld surface analysis along with 2D fingerprint plots. Both C(methyl)−H⋅⋅⋅C and C(naphthyl)−H⋅⋅⋅C found. A C(naphthyl)−H⋅⋅⋅O hydrogen bon...

The synthesis of non-racemic 5-membered cyclic carbonates from abundant alcohols is reported. Conversion the alcohol into an azanyl carbonate followed by a chiral-at-ruthenium catalyzed cyclization to provide chiral in yields up 95% and with 99% ee. This new synthetic method proposed proceed through nitrene-mediated intramolecular C(sp 3 )−H oxygenation which includes very unusual 1,7-hydrogen ...

Various mechanisms of the formation of naphthalene and its substituted derivatives have been investigated by ab initio G3(MP2,CC)∕B3LYP∕6-311G∗∗ calculations of potential energy surfaces for the reactions of one and two C(2)H additions to styrene combined with RRKM calculations of product branching ratios under single-collision conditions. The results show that for the C(2)H + styrene reaction,...

     The aim of the present research was to study the effects of weak cation exchange resins, polacrilex with exchangeable H+ and polacrillin potassium and strong cation exchange resin sodium polystyrene sulfonate on water uptake behavior of ranitidine hydrochloride. Drug resin complexes (DRC) were prepared and evaluated for the percentage of moisture gain when placed in a humidity c...

Fair cake-cutting is the division of a cake or resource among N users so that each user is content. Users may value a given piece of cake differently, and information about how a user values different parts of the cake can only be obtained by requesting users to “cut” pieces of the cake into specified ratios. Many distributed computing problems which involve resource sharing can be expressed as...

Complex organic molecules with three carbon atoms are found in the earliest stages of star formation. In particular, propenal (C$_2$H$_3$CHO) is a species interest due to its implication formation more complex and even biotic molecules. This study aims search for presence C$_2$H$_3$CHO other three-carbon such as propylene (C$_3$H$_6$) hot corino region low-mass protostellar binary IRAS 16293--2...