The one-dimensional chain polymer of aqua(tyrosinato)zinc(II)

Abstract

In the title compound, catena-poly[[aquazinc(II)]-micro(3)-tyrosinato], [Zn(C(9)H(7)NO(3))(H(2)O)](n), each Zn atom has a distorted square-pyramidal geometry comprised of three O atoms and one N atom from three tyrosinate (tyr) ligands, and one aqua ligand. Two inversion-related Zn(2+) ions are bridged by two O atoms from the phenolate groups of two tyr ligands to form a centrosymmetric dimeric unit, which can be described as a planar Zn(2)O(2) four-membered ring. These repeating dimeric units are arranged along the c axis to give a one-dimensional chain coordination polymer, in which the tyr ligand adopts an unusual chelating/bridging coordination mode.

Structural, spectroscopic and magnetic properties of a novel copper(ii)l-tyrosinato complex

“…5 L-Tyrosine, as well as other amino acids, forms coordination bonds with metal ions. These metal ions complexes are structural, spectroscopic, magnetic characterized [6][7][8][9][10][11][12] and tested against bacterial 13,14 or fungal [13][14][15] strains. However, their biological properties are relatively rarely evaluated.…”

CoII/ZnII–(L‐Tyrosine) Magnetic Metal–Organic Frameworks

“…An unusual chelating/bridging coordination mode was reported recently, whereby l-tyr bridges two metal atoms through its phenoxy oxygen atom, whilst also chelating a metal atom through the amino and carboxylate groups, resulting in the formation of a polymeric chain. [9] Here, we report three chiral MOFs and one racemic material with new 3D frameworks exhibiting parallel ladders composed of metal dimers and linked by l-tyr displaying a new coordination mode and the highest coordination number reported so far. Although many different types of cobalt connection modes have been reported, these metal dimers are unprecedented, consisting of edge-sharing octahedra and tetrahedra.…”

“…This bridging mode may result in catena products. An unusual chelating/bridging coordination mode was reported recently, whereby L ‐tyr bridges two metal atoms through its phenoxy oxygen atom, whilst also chelating a metal atom through the amino and carboxylate groups, resulting in the formation of a polymeric chain 9…”

Metal Coordinated Poly-Zinc-Liothyronine Provides Stable Circulating Triiodothyronine Levels in Hypothyroid Rats

“…This tridentate form of T3 possesses two ionizable functional groups-amino acid and phenol-capable of forming two coordinate covalent bonds with a metal. Due to the phenol group, tyrosine and T3 are the only natural amino acids that can act as tridentate ligands, which favors formation of supramolecular or polymeric structures (34). The supramolecular structure of PZL possesses many characteristics that promote intestinal mucoadhesion, including its novel polymeric nature, an ability to form non-covalent bonds with the negatively charged mucosal surface, and electrostatic interactions between Zn 2+ and the mucosa (35).…”