Three new supramolecular compounds of copper (II), cobalt (II) and zirconium (IV) with pyridine-2,6-dicarboxylate and 3,4-diaminopyridine: Solid and solution states studies

A comparison of solution and solid state coordination environments for calcium(II), zirconium(IV), cadmium(II) and mercury(II) complexes with dipicolinic acid and methylimidazole derivatives

“…Confirming previous results [29][30][31][32][33], the cited distribution diagrams and Figures 11d, 11e, 11b, 11b and table 5 reveal the formation of a variety of ternary complexes between the above-mentioned cations and the proton transfer system at different ranges of pH. The predominant species for Cd 2+ are: CdL 2 QH (at pH 7.6) and CdL 2 QH 2 (at pH 4.1); for Ca 2+ CaL 2 QH (at pH 5.9-7.7), CaLQH (at pH 4.7) and CaLQ (at pH >11.8); for Hg 2+ are: HgLQ 2 (at pH 9.8), HgLQH (at pH 2.0-4.2) and HgL 2 QH (at pH 2.0-4.0); and for Zr 4+ are ZrL 3 Q'H (at pH 6.2-9.4), ZrL 3 Q'H 2 (at pH 5.4) and ZrL 3 Q'H 3 (at pH 3.9-4.6).…”

“…The 2-mim forms relative weak complexes with Ca 2+ and Cd 2+ similar to what was seen for other M 2+ cations [26,27], while the complexation between 1-mim and Zr 4+ ion is relatively strong. The interaction for 2-mim/Hg 2+ is similar to imidazole/Hg 2+ [30] and pydc-M n+ systems [12,24,[31][32][33][34] and is relatively strong, except for the pydc-Ca 2+ system. The cumulative stability constants of M m L l Q q H h , β mlqh , are defined in our previous publications [13,26] where M, L, Q, Q‫׳‬ and H are metal ion, pydc, 2-mim, 1-mim and proton, respectively, and m, l, q and h are the respective stoichiometric coefficients.…”

Interesting properties of p-, d-, and f-block elements when coordinated with dipicolinic acid and its derivatives as ligands: their use as inorganic pharmaceuticals

“…The confirmation of this observation was done via a comparison of independent data reported by Derikvand et al (2012), Siddiqi et al (2010), and Soleimani (2011). It is seen that the dipicolinic acid complexes show a varied resistance to bacterial growth.…”

“…Complexes 10 and 11 were tested for their ability to bind to DNA, and it was seen that there was π-π stacking between the ligands of the complex and the base pairs of DNA (Tabatabaee et al 2013). A new Cu(II) complex, [Cu(Hdipic)(H 2 dipic)]OH -·2H 2 O 12, was tested for its antimicrobial properties (Derikvand et al 2012). Complex 12 was reported to have moderate inhibitory effects on B. subtilis, B. cereus, and S. aureus but had no effect on Gram-negative bacteria (Derikvand et al 2012).…”

“…A new Cu(II) complex, [Cu(Hdipic)(H 2 dipic)]OH -·2H 2 O 12, was tested for its antimicrobial properties (Derikvand et al 2012). Complex 12 was reported to have moderate inhibitory effects on B. subtilis, B. cereus, and S. aureus but had no effect on Gram-negative bacteria (Derikvand et al 2012).…”