Jump to main content
Jump to site search

Issue 38, 2019
Previous Article Next Article

Synthesis, structure and metal ion coordination of novel benzodiazamacrocyclic ligands bearing pyridyl and picolinate pendant side-arms

Author affiliations

Abstract

Novel derivatives of benzodiaza-15-crown-5 (B15C5) and benzodiaza-18-crown-6 (B18C6) ether containing pyridyl (Py) and picolinate (Pic) pendant arms at amine nitrogen atoms of the macrocycle residue were synthesized. The protonation constants of the studied compounds and stability constants of their complexes with a range of heavy and transition metal ions (Cu2+, Zn2+, Ni2+, Cd2+, Pb2+) were determined in aqueous solutions by the potentiometric method. The obtained data showed that all ligands form rather stable complexes with the studied cations of different compositions; however, compounds with picolinate groups were found to be more efficient complexons. NMR studies revealed that in the case of B15C5 type ligands the complex geometry depends on the metal ion size: small radius metal ions (like Zn2+) are placed in the center of the crown ether cavity and the coordination by the pendant groups occurs at opposite sides of the macrocyclic plane, whereas binding of large cations (such as Cd2+ and Pb2+) results in a distorted structure of the complexes. Additional information concerning the structure of complexes was obtained from the analysis of X-ray-diffraction data.

Graphical abstract: Synthesis, structure and metal ion coordination of novel benzodiazamacrocyclic ligands bearing pyridyl and picolinate pendant side-arms

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jul 2019, accepted on 12 Aug 2019 and first published on 13 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ03488A
New J. Chem., 2019,43, 15072-15086

  •   Request permissions

    Synthesis, structure and metal ion coordination of novel benzodiazamacrocyclic ligands bearing pyridyl and picolinate pendant side-arms

    P. A. Panchenko, A. D. Zubenko, E. Y. Chernikova, Y. V. Fedorov, A. V. Pashanova, V. A. Karnoukhova, I. V. Fedyanin and O. A. Fedorova, New J. Chem., 2019, 43, 15072
    DOI: 10.1039/C9NJ03488A

Search articles by author

Spotlight

Advertisements