Supramolecular Arrangement
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Avaliação da Associação Molecular de Complexos Metálicos com Ligante Triazenido 1-óxido / Evaluation of the Association of Molecular Complexes Metallics with Binding Triazenide 1-oxide
In this dissertation were synthetized six compounds, of the which one is free ligand 1- phenyl-3-(4-nitrophenyl) triazene 1-oxide (1) and five are triazenido complexes of [Ni(O2NC6H4NNN(O)C6H5)2(C5H5N)2] (2), [Zn(O2NC6H4NNN(O)C6H5)2(C5H5N)2] (3), [Ag(O2NC6H4NNN(O)C6H4)(PPh3)2] (4), [V(O)2(O2NC6H4NNN(O)C6H4)(C5H5N)] (5) e [Pb(O2NC6H4NNN(O)C6H5)2] (6). The com
Publicado em: 2008
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14. SUPRAMOLECULARIDADE DE TRIAZENOS ASSIMÉTRICOS DISSUBSTITUÍDOS 4-(ETOXICARBONILFENIL)-2-(HALOFENIL) E COMPLEXOS DE Ni(II), Cu(II) E Hg(II) / SUPRAMOLECULARITY OF ASYMMETRIC DISUBSTITUTED 4-(ETHOXYCARBONYLPHENYL)-2-(HALOPHENYL)TRIAZENES AND COMPLEXES CONTAINING Ni(II), Cu(II), AND Hg(II)
Triazenes and/or triazenido ligands, strategically substituted by terminal aryl groups [-N=NN(H)-] or (-N3 --) chains and containing halogen in the ortho position and ester in the para position, were evaluated in relation to the occurrence of intermolecular interactions through secondary non-covalent bonding. The research is based on the single crystal X-ray
Publicado em: 2008
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15. AVALIAÇÃO DE ARRANJOS SUPRAMOLECULARES DE COMPLEXOS TRIAZENIDOS DE MERCÚRIO(II) E COBRE(II) / EVALUATION OF SUPRAMOLECULAR ARRANGEMENTS OF TRIAZENIDE COMPLEXES OF MERCURY(II) AND COPPER(II).
The reaction between deprotonated 1,3-Bis(3-acetylphenyl)triazene and Hg(CH3COO)2 in methanol, yields [Hg(RNNNR)(Py)] (R=3-CH3C(O)C6H4) (1), a triazenide dimeric mononuclear complex of mercury(II). The crystal structure analysis of (1) reveals a bi−dimensional supramolecular arrangement as result of molecular self-assembly provided by Hg−η,
Publicado em: 2007
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16. Synthesis and Structural Analysis of new Coordination Polymer and molecular compounds of Phosphinatos Metals. / SÍNTESE E ANÁLISE ESTRUTURAL DE NOVOS POLÍMEROS DE COORDENAÇÃO E COMPOSTOS MOLECULARES DE FOSFINATOS METÁLICOS
In this work, the structures of coordination polymers and molecular compounds Cu(II), Hg(II), Pb(II) and Cd(II) with phenylphosphinate or diphenylphosphinate ligands were determined and are discussed. The reaction of phenylphosphinic or diphenylphosphinic acid with copper(II) acetate hydrate produces respectively aquaphenylphosphinate copper(II) or quadiphen
Publicado em: 2007
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17. INVESTIGAÇÃO DE COMPLEXOS BINUCLEARES DE K+ E CU(II) COM LIGANTES 1,3-DIARILTRIAZENIDOS SIMÉTRICOS / COMPLEXES INVESTIGATION BINUCLEARES OF K+ And Copper(II) WITH 1,3-DIARYLTRIAZENES AS LIGANDS SYMMETRICAL
At work present it synthesized and determined itself the molecular structure of a copper complex (II) and another of potassium in which both involve triazenides ligands monocatenados previously deprotonated. The reaction between hydroxide of solid potassium and it pre-ligand 1,3-bis(4-nitrophenyl)triazene, in methanol, originated the triazenide complex [K(O2
Publicado em: 2006
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18. Estudos estruturais em compostos de interesse farmacológicos contendo átomos pesados / Structural studies of pharmacological interested compound containing heavy atoms
The determination of the three-dimensional structures of heavy-metal chelates and of some potentially useful chelating agents is a very important to01 in the study of complexes that may act as antidotes against poisoning by ingestion of heavy metals. A detailed knowledge of these complexes is expected to assist in the design of molecular structures and proce
Publicado em: 2004
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19. Using multimodal ligands to influence network topology in silver(I) coordination polymers
A range of Ag(I) one- and two-dimensional coordination frameworks has been prepared and structurally characterized by using the multimodal ligand 3,6-di-pyrazin-2-yl-(1,2,4,5)-tetrazine, which offers both monodentate and chelating binding sites. It is demonstrated that multimodal ligands can be used to prepare coordination frameworks with novel and unusual t
National Academy of Sciences.
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20. The mature activating natural killer cell immunologic synapse is formed in distinct stages
Natural killer (NK) cells form a structure at their interface with a susceptible target cell called the activating NK cell immunologic synapse (NKIS). The mature activating NKIS contains a central and peripheral supramolecular activation cluster (SMAC), and includes polarized surface receptors, filamentous actin (F-actin) and perforin. Evaluation of the NKIS
National Academy of Sciences.
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21. Supramolecular arrangement of Rhodospirillum rubrum B880 holochrome as studied by radiation inactivation and electron paramagnetic resonance.
Oxidation of the B880 antenna holochrome gives rise to a 3.8-G linewidth electron paramagnetic resonance (EPR) signal that is considerably narrower than the 13-G signal of monomeric bacteriochlorophyll (Bchl) cation. Radiation inactivation was used to verify a model according to which this linewidth narrowing is due to delocalization over several Bchl molecu