The self-assembly switching of the group 13 tetrahedral Schiff base complexes by changing the character of coordination centre (original) (raw)
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Spectral Studies of the Mixed Ligand Organometallic Complexes Derived From Schiff Base
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Synthesis and characterisation of a new Schiff base and its metal complexes
A new Schiff base ligand, 2-(6-((E)-1-(2-heptadecylcarbonyl-oxyphenyl)methylideneamino) [1,10] phenanthrolin-5-yl-imino-methyl)phenyl stearate has been synthesised from the reaction of 5,6-bis(salicylideneimino)-1,10-phenanthroline with stearic acid. The ligand reacts with Co(II), Ni(II) and Cu(II) salts to form complexes. The ligand has been characterized by FTIR, 1 H NMR (DMSO-d 6), UV-vis and mass spectra, elemental analysis and fluorescence spectrophotometry. Protonation constants of the ligand and overall formation constants of the complexes have been calculated from potentiometric data using a computer program. IPC Code: Int. Cl. 8 C07F1/08; C07F15/04; C07F15/06 The coordination chemistry of Schiff bases derived from the reaction of salicylaldehyde and o-diamines has been the subject of many studies and a number of them are used as oxygen carriess to mimic compli-cated biological systems 1-7 . They are also efficient reagents in trace analysis of some metal cations 8 . Schiff ...
2000
A range of mostly new oxovanadium (IV) complexes is described. They contain coordinated Schiff bases, made from simple dipeptides (glycylglycine, glycylsarcosine, l-alanylglycine, l-alanyl-l-alanine, d, l-alanyl-d, l-alanine and l-serylglycine), and salicylaldehyde. The compounds are characterised and the nature of their coordination spheres shown by analysis, TLC, by appropriate spectroscopy (EPR, IR, electronic and circular dichroism of solution and solids) and by magnetic susceptibility measurements.