Non-symmetrical tetradentate vanadyl Schiff base complexes derived from 1,2-phenylene diamine and 1,3-naphthalene diamine as catalysts for the oxidation of cyclohexene

Synthesis, Crystal Structure and Spectroscopic Studies of 2-{(E)-[2-Hydroxyphenyl)imino]methyl} Phenol Schiff Base Molecule

“…Some Schiff bases are used as ion-selective electrode [8]. Some complexes containing nitrogen and oxygen donor atoms in the complexes are effective as stereospecific catalysts for oxidation, reduction, hydrolysis, biological activity and other transformations of organic and inorganic chemistry [9][10][11][12]. It is known that Schiff bases containing electroactive imine group in non-aqueous media have two reduction peaks corresponding to a one-electron transfer in a cyclic voltammogram and the electrode reaction is an EC mechanism [13].…”

Nonsymmetrically Substituted Uranyl-Salophen Receptors: New Opportunities for Molecular Recognition and Catalysis

“…In the literature there is a certain number of examples dealing with the synthesis of nonsymmetrical salen complexes, 18,19,20,21,22 while fewer are those concerning also salophen derivatives. 23,24 Insert 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w O n l y 4 There is more than one possibility to break the symmetry of the complex. We can start from a nonsymmetrically substituted 1,2-phenylendiamine (A in Figure 1); from two different aromatic carbonyl derivatives (B in Figure 1), one of which is not an aldehyde, or from two different salicylaldehydes (C in Figure 1).…”

Investigation of VO–salophen complexes electronic structure

“…In previous papers, the variation of the Schiff base ligands was used to investigate how the oxidation reactivity of a metal complex is influenced by the electronic density on the metal [9,10,[17][18][19]. Considering the oxidation with H 2 O 2 of a model compound, i.e.…”

“…From this point of view, salophen metal complexes are even more intriguing with respect to salen derivatives, due to their aromatic structure, which controls the light absorption properties. Even if an electrochemical study of differently substituted salophen vanadyl complexes has been reported [17][18][19], a detailed comparison with UVvisible data is still lacking.…”