Deux nouvelles séries de composés à cristaux liquides contenant du 1,3,4-oxadiazole ont été synthétisées et caractérisées par des points de fusion, une analyse élémentaire FTIR et une spectroscopie 1HNMR. Les propriétés des cristaux liquides des composés synthétisés ont été vérifiées en utilisant une microscopie optique polarisante à chaud et un calorimètre à balayage différentiel. Tous les composés des deux séries présentent des propriétés mésomorphes. Tous les membres de ces deux séries présentent des phases smectiques A, smectique C et/ou nématiques. Continuellement, pour améliorer l'étude physique, les nanoparticules d'argent ont été préparées par méthode de réduction et identifiées principalement par analyse XRD, SEM et AFM. De toutes ces techniques, la taille des particules de nano semblait inférieure à (50) nm. Une étude théorique de la géométrie du noyau en effectuant la recherche conformationnelle sur ses angles de torsion affectifs avec les méthodes PM3 et RM1 afin d'inclure l'effet des facteurs de mécanique quantique qui affectent la géométrie du noyau. Les propriétés diélectriques et d'autres propriétés physiques telles que la conductivité électrique (AC) et le temps de relaxation ou l'énergie d'activation ont été étudiées pour deux systèmes de cristaux liquides purs et leurs dopés avec des nanoparticules d'argent.
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Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -A new two series of liquid crystal compounds containing 1,3,4-oxadiazole were synthesized and characterized by melting points, elemental analysis FTIR and 1HNMR spectroscopy. The liquid crystal properties of the synthesized compounds were verified by using hot-stage polarizing optical microscopy and differential scanning calorimeter. All of the compounds in both two series show mesomorphic properties. All members of those two series exhibit smectic A, smectic C and/ or nematic phases. Continually, to improve the physical study, Silver nanoparticles were prepared by reduction method and identified by mostly analysis XRD, SEM and AFM. From all of these techniques the particle size of nano seemed less than (50) nm. A theoretical investigating of core geometry by doing the conformational search over its affective torsion angles with PM3 and RM1 methods in order to include the effect of quantum mechanical factors that effect on the core geometry. Dielectric properties and other physical properties such as electrical conductivity (AC) and relaxation time or activation energy have been studied for two systems pure liquid crystals and their doped with silver nano particles. 120 pp. Englisch. N° de réf. du vendeur 9783659682636
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Vendeur : moluna, Greven, Allemagne
Kartoniert / Broschiert. Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Naser Juman A.Juman Naser, Ph.D. and M.Sc. of Physical Chemistry from University of Baghdad, Iraq. B.Sc. of Chemistry from University of Basrah, Iraq. She is currently Assistant Professor of Physical Chemistry at Baghdad University. N° de réf. du vendeur 15939336
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Vendeur : AHA-BUCH GmbH, Einbeck, Allemagne
Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - A new two series of liquid crystal compounds containing 1,3,4-oxadiazole were synthesized and characterized by melting points, elemental analysis FTIR and 1HNMR spectroscopy. The liquid crystal properties of the synthesized compounds were verified by using hot-stage polarizing optical microscopy and differential scanning calorimeter. All of the compounds in both two series show mesomorphic properties. All members of those two series exhibit smectic A, smectic C and/ or nematic phases. Continually, to improve the physical study, Silver nanoparticles were prepared by reduction method and identified by mostly analysis XRD, SEM and AFM. From all of these techniques the particle size of nano seemed less than (50) nm. A theoretical investigating of core geometry by doing the conformational search over its affective torsion angles with PM3 and RM1 methods in order to include the effect of quantum mechanical factors that effect on the core geometry. Dielectric properties and other physical properties such as electrical conductivity (AC) and relaxation time or activation energy have been studied for two systems pure liquid crystals and their doped with silver nano particles. N° de réf. du vendeur 9783659682636
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Vendeur : buchversandmimpf2000, Emtmannsberg, BAYE, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -A new two series of liquid crystal compounds containing 1,3,4-oxadiazole were synthesized and characterized by melting points, elemental analysis FTIR and 1HNMR spectroscopy. The liquid crystal properties of the synthesized compounds were verified by using hot-stage polarizing optical microscopy and differential scanning calorimeter. All of the compounds in both two series show mesomorphic properties. All members of those two series exhibit smectic A, smectic C and/ or nematic phases. Continually, to improve the physical study, Silver nanoparticles were prepared by reduction method and identified by mostly analysis XRD, SEM and AFM. From all of these techniques the particle size of nano seemed less than (50) nm. A theoretical investigating of core geometry by doing the conformational search over its affective torsion angles with PM3 and RM1 methods in order to include the effect of quantum mechanical factors that effect on the core geometry. Dielectric properties and other physical properties such as electrical conductivity (AC) and relaxation time or activation energy have been studied for two systems pure liquid crystals and their doped with silver nano particles.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 120 pp. Englisch. N° de réf. du vendeur 9783659682636
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Vendeur : Mispah books, Redhill, SURRE, Royaume-Uni
paperback. Etat : Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book. N° de réf. du vendeur ERICA82336596826326
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