Complexes of phosphonate and phosphinate derivatives of dipicolylamine

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10376997" target="_blank" >RIV/00216208:11310/18:10376997 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1039/c8nj00100f" target="_blank" >https://doi.org/10.1039/c8nj00100f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c8nj00100f" target="_blank" >10.1039/c8nj00100f</a>

Result language
angličtina
Original language name
Complexes of phosphonate and phosphinate derivatives of dipicolylamine
Original language description
Four dipicolylamine (DPA) derivatives bearing methylphosphonic or methylphosphinic acid (P-R; R = H, Me, CH2PO2H2) groups were synthesized. Their acid-base and coordination properties were studied by potentiometry, UV-Vis and NMR measurements. The phosphonate derivative shows increased basicity (log K-1 = 8.39), whereas the phosphinate derivatives show decreased basicity (log K-1 = 6-7) compared to the parent dipicolylamine. Consequently, the stability constants of the phosphonate complexes are 3 to 4 orders of magnitude higher than those of the phosphinate complexes. All ligands show excellent selectivity for Zn(II) over Ca(II) and Mg(II) ions. The structures of several Cu(II) and Ni(II) complexes in the solid state were determined by X-ray diffraction analysis. The complexes mostly show dimeric or polymeric structures and the two metal ions induce a different coordination geometry of the DPA group. The coordination geometry is always (pseudo) octahedral. The DPA fragment is bound in mer geometry in the Cu(II) complexes, whereas the Ni(II) complexes have fac geometry. In conclusion, the phosphonate and phosphinate derivatives of DPA are efficient complexing agents for divalent transition metal ions and the DPA-phosphinate grouping is a suitable fragment for sensing Zn(II) ions.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/GA17-13721S" target="_blank" >GA17-13721S: Copper isotopes and new theranostics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)