Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 1030-1049 of 1302
-
Article
Structural mimicry and the photoreactivity of organic solids
(1983)Molecules that are photostable in the solid state can be rendered photoactive if, by burial within crystals of closely analogous monomers, they can be made to mimic the molecular conformation of the latter
-
Article
Structural motifs and biological studies of new antimony(iii) iodide complexes with thiones
(2010)Eight new antimony(III) iodide complexes of the heterocyclic thioamides, 2-mercapto-1-methylimidazole (MMI), 2-mercaptobenzlmidazole (MBZIM), 5-ethoxy-2-mercaptobenzimldazole (EtMBZIM), 2-mercaptothiazolidine (MTZD), ...
-
Article
Structural Properties of Micelles Formed by Telechelic Pentablock Quaterpolymers with pH-Responsive Midblocks and Thermoresponsive End Blocks in Aqueous Solution
(2019)We investigated the structural properties of dynamic micelles arising from the self-assembly of the multiresponsive pentablock quaterpolymer P(nBuMA8-co-TEGMA8)-b-PDMAEMA50-b-PEG46-b-PDMAEMA50-b-P(nBuMA8-co-TEGMA8) (nBuMA, ...
-
Article
Structural, magnetic, and computational correlations of some imidazolo-fused 1,2,4-benzotriazinyl radicals
(2014)1,3,7,8-Tetraphenyl-4,8-dihydro-1H-imidazolo[4,5g][1,2,4]benzotriazin-4-yl (5), 8-(4-bromophenyl)-1,3,7-triphenyl-4,8-dihydro-1H-imidazolo[4,5g][1,2,4] benzotriazin-4-yl (6), and 8-(4-methoxyphenyl)-1,3,7-triphenyl-4,8-dihydro-1H- ...
-
Article
Structure of a 'doped' diacetylene that is polymerisable in the solid state
(1985)The crystal structure has been determined of a silver perchlorate-doped diacetylene derivative which yields upon γ-ray irradiation a semi-conducting polymer product
-
Article
The structure of a ferrous heme-nitro species in the binuclear heme a3/CuB center of ba3-cytochrome c oxidase as determined by resonance Raman spectroscopy
(2015)Members of the cytochrome c oxidase family exhibit nitrite reductase activity. In this work, we have characterized a ferrous heme a3-nitro species in ba3-oxidase by resonance Raman spectroscopy. This provides the first ...
-
Article
The structure of the hyponitrite species in a heme Fe-Cu binuclear center
(2007)NO laughing matter: The enzymatic production of laughing gas (N 2O) from two molecules of NO requires the formation of the N-N bond and the subsequent cleavage of the N-OH bond. Resonance Raman spectroscopic studies have ...
-
Article
Structure, reactivity, luminescence and magnetism of dinuclear Ln 3+ complexes produced by the Ln3+-assisted hydrolysis of 3,6-bis(2-pyridyl)tetrazine
(2013)Twelve Pr3+, Sm3+, Eu3+, Gd3+, Tb3+ and Dy3+ complexes of N-(pyridin-2-ylmethylene) picolinohydrazonate (phzp-) were synthesized by the Ln3+ assisted hydrolysis of 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine. Crystallographic ...
-
Article
-
Article
Studies of steam-activated viscose rayon chars
(1992)Standard techniques, such as nitrogen adsorption, mercury porosimetry, and X-ray photoelectron spectroscopy, have been used to characterise steam-activated viscose rayon-derived chars pretreated with aqueous solutions of ...
-
Article
Studies on the interaction of olive cake and its hydrophylic extracts with polyvalent metal ions (Cu(II), Eu(III)) in aqueous solutions
(2009)The paper presents and discusses the chemical affinity of two different forms of natural organic matter (e.g. in solid (SOM) and soluble form (DOM)) for Cu2+ and Eu3+ ions. In the this study SOM is represented by olive ...
-
Article
Studies on the separation of Ra(II), U(VI) and Eu(III) from aqueous solution using MnO2-resin
(2018)The applicability of MnO2-resin for the selective separation of Ra(II) from aqueous solutions containing also U(VI) and Eu(III) has been investigated as a function of solution pH and salinity. The measurements were performed ...
-
Article
Study of copper sulfide crystallization in PEO-SDS solutions
(2004)The crystallization of copper sulfide in aqueous supersaturated solutions in the presence of the polymer poly(ethylene oxide), PEO, and the surfactant sodium dodecyl sulfate, SDS, was investigated. In these systems, copper ...
-
Article
A Study of Solid-Liquid Phase Equilibria of Pu(VI) and U(VI) in Aqueous Carbonate Systems
(1993)Solubility products of PuO2CO3(s) and UO2CO3(s) are determined in 0.1 M NaC1O4 at 22 1 C under 100%, 1 % and 0.03% CO2. The carbonate precipitates of Pu(VI) and U(VI), prepared under 100% CO2 at neutral pH, are characterized ...
-
Article
Study of the anomalous behaviour of MFI zeolites towards nitrogen adsorption
(2006)In this presentation we discuss the effect of the presence of small amounts of template and of the nature of the exchangeable cation on the shape of the nitrogen adsorption isotherm of ZSM-5 zeolite samples. It was found ...
-
Article
Study of the crystal and molecular structure of the 9-cyanoanthracene trans dimer and of its monomerisation
(1985)The structure of the 9-cyanoanthracene trans dimer (9-CNAD) has been solved by direct methods [P1, a = 10.146(1) Å, b = 17.785(1) Å, c = 11.501(1) Å, α = 92.95(1)°, β = 95.59(1)°, γ = 89.82(1)°, Z = 4]. No evidence for ...
-
Article
Study of the crystallization of nanoporous mixed metal oxide phases
(2008)A systematic study of the synthesis and characterization of pristine ceria and of mixed cerium/metal oxides has been undertaken. Various synthetic routes were explored, with the crystallization process being examined via ...
-
Article
Study of the influence of the impregnation acidity on the structure and properties of molybdena-silica catalysts
(1987)Three samples of 8 mol% MoO3 supported on SiO2 have been prepared using impregnating solutions with different acidity levels (pH 1, 6 and 11, respectively). The three products had different structures and behaved in a ...
-
Article
A study of the infrared absorption spectra of thin amorphous films of molybdenum trioxide
(1989)The spectra of thin amorphous films of MoO3 deposited by vacuum evaporation have been studied within the spectral range 4000-400 cm-1 by the Fourier transform infrared technique. Some samples in the thickness range 100 to ...
-
Article
Study of the structure and properties of TAPO-5 molecular sieve
(1989)The conditions under which some of the Ti4+ ions in TAPO-5 (a titanium containing aluminophosphate) can be reduced to Ti3+ whilst leaving the crystal and pore structure of the molecular sieve intact, have been studied. ESR ...