NOPR Collection:

Studies on the phase behaviour and solubilization of p-octyl polyethylene glycol phenyl ether/oil/1-pentanol/ water microemulsion systems

2010-10-17T16:30:43Z

Title: Studies on the phase behaviour and solubilization of p-octyl polyethylene glycol phenyl ether/oil/1-pentanol/ water microemulsion systems Authors: Yang, B; L Chai, J; Q Li, X; L Li, H; J Lu, J; T Wu, Y Abstract: Phase behaviour and solubilization ability of the microemulsion systems consisting of the nonionic surfactant p-octyl polyethylene glycol phenyl ether/oil/1-pentanol/brine have been studied using ε-β fishlike phase diagrams. From these phase diagrams, solubility of the alcohol, composition of the interfacial layer, and solubilization ability of the microemulsion systems have been studied. The effects of different oils, salinities and temperature on the phase behaviour and solubilization ability have been investigated. The solubilization ability increases with decrease in the length of the alkanes. With decrease in salinity or temperature, the solubilization ability and the solubility of the alcohol increase. Page(s): 1349-1353

Synthesis, crystal structure and photoluminescence property of a Cd(II) framework complex [Cd(2-PTZ)₂(H₂O)₂] {2-PTZ = 5-(2-pyridyl tetrazolate)}

2010-10-12T16:31:00Z

Title: Synthesis, crystal structure and photoluminescence property of a Cd(II) framework complex [Cd(2-PTZ)₂(H₂O)₂] {2-PTZ = 5-(2-pyridyl tetrazolate)} Authors: Singh, Sadhana; Mayer, Peter; Pandey, Ashutosh Abstract: A new 2D supramolecular (hydrogen bonded) Cd(II) network, [Cd(2-PTZ)₂(H₂O)₂]_n (2-PTZ = 5-(2-pyridyl) tetrazolate) has been synthesized by hydrothermal reaction and characterized by IR, and X-ray single crystal analysis. In the molecular structure of the studied complex, Cd(II) ion is six-coordinated, which is completed by two water molecules and two 2-PTZ ligands which provide two nitrogens from the two tetrazolyl groups and two nitrogen atoms from pyridyl rings. The mononuclear units are assembled by intermolecular hydrogen bonding to generate two-dimensional sheets. Photoluminescence spectrum of the polymer complex exhibits strong blue emission at λ_{max =}439 nm in the solid state at room temperature. Page(s): 1345-1348

Synthesis, characterization and catalytic effect of bimetallic nanocrystals on the thermal decomposition of ammonium perchlorate

2010-10-12T16:31:04Z

Title: Synthesis, characterization and catalytic effect of bimetallic nanocrystals on the thermal decomposition of ammonium perchlorate Authors: Srivastava, Pratibha; Dubey, Reena; P S Kapoo, I; Singh, G Abstract: Bimetallic nanocrystals, viz., Cu-Co, Cu-Fe and Cu-Zn, have been prepared by hydrazine reduction in ethylene glycol and characterized by X-ray diffraction, transmission electron microscopy and energy dispersive X-ray analysis. The particle size of the nanocrystals is found to be of the order of 10-38 nm. These nanocrystals have been found to have a significant catalytic effect on the thermal decomposition of ammonium perchlorate and also on the burning rate of composite solid propellants. The catalytic characteristics have been attributed to the large surface area and the active chemical nature of the bimetallic nanocrystals. Page(s): 1339-1344

Density functional theory study on the interaction between guanine-cytosine base pair and formamide

2010-10-13T16:31:14Z

Title: Density functional theory study on the interaction between guanine-cytosine base pair and formamide Authors: Qin, Mei; Zhao, Gang; Du, Dong-mei; Ma, Ke-sheng; Zhou, Zheng-yu Abstract: Hydrogen bonding in complexes formed between guanine-cytosine and formamide has been investigated by using density functional theory method at 6-311++G(d, p) level. The binding energies of these complexes have also been calculated at the B3LYP/6-311++G(d, p) level. Thirteen stable cyclic structures involved in the interaction have been found on the potential energy surface. The most stable geometry has been obtained by analysis of the structure, NPA charge and interaction energy of complexes. The results show that the interactions between formamide and guanine-cytosine base pair affect the stabilities of the base pairs. Page(s): 1332-1338

NOPR Collection:

Studies on the phase behaviour and solubilization of p-octyl polyethylene glycol phenyl ether/oil/1-pentanol/ water microemulsion systems

Synthesis, crystal structure and photoluminescence property of a Cd(II) framework complex [Cd(2-PTZ)2(H2O)2] {2-PTZ = 5-(2-pyridyl tetrazolate)}

Synthesis, characterization and catalytic effect of bimetallic nanocrystals on the thermal decomposition of ammonium perchlorate

Density functional theory study on the interaction between guanine-cytosine base pair and formamide

Synthesis, crystal structure and photoluminescence property of a Cd(II) framework complex [Cd(2-PTZ)₂(H₂O)₂] {2-PTZ = 5-(2-pyridyl tetrazolate)}