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Showing 1 to 20 of 137 for “"Schiff base"”.
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Polymer Bound Schiff Base Complexes
Made available in DSpace on 2014-12-13T20:10:24Z (GMT). No. of bitstreams: 1 7820943.pdf: 6627218 bytes, checksum: 62c64ff257b2c40dc45f845edc4f6586 (MD5) Previous issue date: 1978
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Development and exploration of Schiff base ruthenium carbene catalysts for olefin metathesis
… part deals with the synthesis and activity of Schiff base substituted second generation Grubbs catalysts, bimetallic Schiff base substituted Grubbs catalysts, the development of new NHCs (N-Heterocyclic Carbene) for the 2nd generation Grubbs catalysts and a detailed investigation of secondary …
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Novel Discoveries About the Spin-Crossover Transition in Schiff-Base Ferric Complexes
… The ligand, X-SalEen, is obtained by the Schiff-base condensation of salicylaldehyde, 3-OCH(,3)-salicylaldehyde, or 5-OCH(,3)-salicylaldehyde with N-ethylethylenediamine. The anion, Y, used is NO(,3)('-), PF(,6)('-) or BPh(,4)('-). Magnetic susceptibility measurements revealed that, like …
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A study of the oxygenation of some manganese (II) tetradentate schiff base complexes
Manganese(II) complexes formed by the reaction of either salicylaldehyde or 5-chlorosalicylaldehyde and 1,4-diaminobutane (SALBTDA), 1,6-diaminohexane (SALHXDA), 1,8- diaminooctane (SALOTDA), and 1,10- diaminodecane (SALDCDA) have been isolated. The complexes Mn(SALHXDA), Mn(SALOTDA), and …
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Preparation and characterization of pentadentate Schiff base cobalt(II) complexes and their dioxygen adducts
… complexes with linear potentially pentadentate Schiff base ligands have been prepared and their reaction with dioxygen studied. The ligands were synthesized from salicylaldehyde and diamino compounds containing a central donor atom. Various derivatives were produced by using a substituted …
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Metal(ii) schiff base complexes and the insulin-mimetic Studies on the oxovanadium(iv) complexes
… symmetrical and four unsymmetrical tetradentate Schiff bases with the N2O2 chromophore were isolated in pure form and fully characterized by elemental analyses, melting point, IR and 1H NMR. The appearance of two different peaks for each of the azomethine protons and phenolic protons confirm the …
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The synthesis and characterization of some manganese (II) Schiff base complexes and their oxygenation products
… and its corresponding oxygenated products. The Schiff base ligands chosen for this study (Figure 3) were of the type believed to be in, the environment of manganese as it exists in the photosynthetic process. The ligand systems employed will be derived from salicylaldehyde and a series of …
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Synthesis of imidazole schiff base ligands, their silver (I) complexes and their activities against candida albicans
… the synthesis of ca. 50 new imidazole-containing Schiff base ligands, the formation of their Ag(I) complexes and their evaluation as agents for inhibiting the growth of the fungal pathogen, Candida albicans. The synthesis of some Schiff base ligands proved problematic and the products were …
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Magnetic Exchange Effects in Outer-Sphere Associated Metal Dimers and in Oxidized Manganese(ii) Schiff Base Complexes
Made available in DSpace on 2014-12-13T20:09:58Z (GMT). No. of bitstreams: 1 7709065.pdf: 13092680 bytes, checksum: e1eab93c7e72699be794c549fbe95218 (MD5) Previous issue date: 1976
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The effect of denticity on the electrochemistry and oxygenation kinetics of polydentate Schiff base complexes of manganese
… of potentially bidentate and tridentate Schiff base ligands have been prepared. The ligands were prepared from substituted salicylaldehyde or pyridine-2-carboxaldehyde and amines with hydrocarbon or alkylpyridyl substituents. The electrochemistry and the oxygenation kinetics of these and …
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Novel Schiff-base and Benzamide N,O-Donor Ligands for Development as Fluorionophores and Selective Metal Ion Binders
A new family of Schiff-base ligands using meta-hydroxybenzaldehyde and a variety of di- and triamines as precursors were prepared and fully characterised. These ligands were reacted with various MX2 salts (M = Cu, Ni and Zn and X = perchlorate, acetate and chloride). In every case except one (where …
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Kinetics and Mechanism of the Catalysis of the Decomposition of Hydrogen Peroxide by Schiff Base Complexes of Copper(II).
… of a dimeric Cu(II) complex of a dissymetric Schiff base, [CuSALAD]<sub>2</sub>.H<sub>2</sub>O, and imidazole or methyl substituted imidazoles, B, which form monomeric CuSALAD.B<sub>2</sub> complexes, in aqueous ethanol solvent. Freezing point depression and vapor pressure lowering studies …
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Theoretical Studies of the Solvation, Dynamics, and Photochemistry of Ethylene, Retinal Protonated Schiff Base, Oligocellulose, and Gd(III) Clusters
The solution dynamics of an anomerically pure series of cellulose oligomers have been studied by 13C NMR relaxation techniques and compared to molecular dynamics (MD) simulations. We found evidence of anisotropic motion across the series, with experimentally determined order parameters (S 2) …
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Direct QM/MM Simulations of the Excited State Dynamics of Retinal Protonated Schiff Base in Isolation and in Complex Environments
Retinal Protonated Schiff Base (RPSB) is the chromophore employed by the rhodopsin family of proteins, which includes rhodopsin (Rh), bacteriorhodopsin (bR) and halorhodopsin (hR). Photoisomerization of RPSB from the all-trans to 13-cis conformation triggers ion transport across the cell membrane …
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Spectroscopic Examination of the Catalytic Decomposition of hydrogen Peroxide by a Copper (II) Complex of a Dissymmetric Schiff Base and an Imidazole Derivative.
… copper (II) complexed with a dissymmetric Schiff base and imidazole derivatives had identified catalase activity of these complexes towards H<sub>2</sub>O<sub>2</sub>. Reactions such as this are of great interest due to the important role of copper-based complexes in biological systems. Our …
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Zinc(II) Schiff Base Complexes and their Aggregation/Deaggregation Properties: Versatile and Multifunctional Materials as Chemosensors and Building Blocks for New Supramolecular Architectures
… di complessi anfifilici derivati da basi di Schiff bis(salicilaldiminato) di Zinco(II), con diversi gruppi diamminici a ponte, e le loro applicazioni come chemosensori, materiali con proprietà di ottica non lineare (NLO) e vapocromiche, e come sintoni per la formazione di nuove nanostrutture …
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Selected topics in fast atom bombardment (FAB) mass spectrometry a)specially designed probe tips and ion generation, b)structures of vitamin B6 schiff base complexes
… section involves the study of several Vitamin B6 Schiff Base complexes using both positive and negative ion FAB MS. This section is an exploration of the usefulness of FAB MS as a structure probe for the metalcoordination complexes of Vitamin B6.
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Synthesis and characterization of metal complexes 2-Benzoylpyridene and di-2-pyridyl ketone schiff base ligands derived from s-methyldithiocarbazate fragment and its application to biological activity toward P.Falciparum
The synthesis, characterization, spectroscopic and biological evaluation of 2-benzoylpyridine-s-methyldithiocarbazate (HL1) and di-2-pyradylketone-s-methyldithiocarbazate (HL2) with selected metal ions of copper (II), zinc (II), cadmium (II), nickel (II), iron (II) and cobalt (II). The ligands, HL1 …
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Design of injectable hydrogels and nanogels relying on Schiff-base crosslinking of custom-made poly(ether urethane)s and photo-cured methacryloyl gelatin for in situ drug delivery and biological tissue mimics
L'abstract è presente nell'allegato / the abstract is in the attachment
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