Studies of Ti(IV) and Zr(IV) chelates with N2O2; Schiff bases of 2-hydroxy-1-naphthaldehyde with aromatic diamines

Synthesis and characterization of azo-linked Schiff bases and their nickel(II), copper(II), and zinc(II) complexes

“…Schiff bases and their metal complexes have been prepared because of their interesting and important properties, e.g., ability to bind toxic and heavy metal atoms [1], undergo tautomerism [2], exhibit catalytic reduction [3] and photochromism [4]. Several studies have also shown that diazo compounds exhibit properties similar to those of Schiff bases [5,6].…”

Electrical properties of Ga(III), In(III), Zr(IV) and Sn(IV) complexes with Schiff bases derived from 2-hydroxynaphthaldehyde and phenylenediamines

“…Metal complexes using Ga(III), In(III), Zr(IV) and -e9 Sn(IV) were prepared and characterized as discussed previously [7,8]. The analytical data are present in -9.…”

“…The phenomenon of discontinuity in the conductivity-temperature profiles has been ascribed to the molecular rearrangement of crystallographic or phase transitions I-9, 10]. However, the continuity and stability of the investigated compounds have been justified by some differential thermal analysis (DTA) measurements [1][2][3][4][5][6][7][8], which revealed that the samples are, in general, stable in the temperature range 35-100°C. The values of AE and log ~ at 50 °C are presented in Table I.…”

“…The conductivity and activation energy were found to depend on the structure of the complex and the ionic radius of the metal ion. This work is an extension of previous studies on the synthesis and physicochemical properties of Ga(III), In(III), Zr(IV) and Sn (IV) chelates with some Schiff bases [7,8]. It is aimed at studying in detail the electrical conductivity, the mechanism of conduction and the currenWvoltage (I-V) characteristics of these complexes.…”

The DNA cleavage and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes of 4-pyridinecarboxaldehyde with 4-aminopyridine

“…During the past three decades considerable attention has been paid to the chemistry of the complexes of the Schiff base containing nitrogen and other donors. This may be attributed to their stability biological activity and potential applications in many fields such as oxidation catalysis [4][5][6] electrochemistry etc, making the behavior of Schiff base complexes with transition metals a worthy research topic. The coordination chemistry of amino acid-Schiff base ligands is also of considerable interest due to their biological importance [7][8][9].Schiff base complexes of transition metals are often useful as chemical nucleases due to their structure and physico-chemical properties.…”