Can I read Zinc Complexation of 3,6,9,17,20,23-Hexaazatricyclo[23.3.1.111,15]triaconta-1(29),11(30),12,14,25,27-hexaene and Its Molecular Recognition of Anions on EtoBox?

Zinc Complexation of 3,6,9,17,20,23-Hexaazatricyclo[23.3.1.111,15]triaconta-1(29),11(30),12,14,25,27-hexaene and Its Molecular Recognition of Anions by Tania F Pauwels; Peter W Smet; André M Goeminne is a Chemistry article available to read on EtoBox.

What is Zinc Complexation of 3,6,9,17,20,23-Hexaazatricyclo[23.3.1.111,15]triaconta-1(29),11(30),12,14,25,27-hexaene and Its Molecular Recognition of Anions about?

The hexaaza macrocyclic ligand 3,6,9,17,20,23-hexaazatricyclo[23.3.1.1 11,15 ]triaconta-1(29),11(30),12,14,25,27-hexaene (L), forms both mono-and dinuclear species, as well as several protonated and hydroxo chelates with Zn(II) ions. These cationic species can bind inorganic and organic anions through coordination and hydrogen bonding. Stability constants of the mononuclear Zn(II) complexes of L as well as their interaction with maleate, pyrophosphate and norleucine anions have been measured potentiometrically and for norleucine also by means of 1 H NMR. From these results it can be observed that all the anion complexes formed present 1:1 stoichiometry, which seems to be the preferred binding mode for charged anions. The complexation with Zn(II) ions shows an explicit preference to form hydroxo species which is also seen for the studied host-guest complexation. Remarkable is the existence of a dinuclear host-guest complex with pyrophosphate and norleucine anions which prevents the formation of hydroxo complexes till higher pH.

Who reads Zinc Complexation of 3,6,9,17,20,23-Hexaazatricyclo[23.3.1.111,15]triaconta-1(29),11(30),12,14,25,27-hexaene and Its Molecular Recognition of Anions?

Author

Tania F Pauwels; Peter W Smet; André M Goeminne

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0277-5387)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)