Synthesis, and characterization of 1- and 2-D coordination polymers derived from the pseudopeptidic ligand oxamide-N,N′-diacetate: Insights into the supramolecular architectures constructed through H-bonds

The Formation of CuCl2‐Specific Metallogels of Pyridyloxalamide Derivatives in Alcohols

“…Only a few examples of metal complexes with oxalyl retro-peptide ligands have been described so far and none of these reports were related to the formation of gels. [7] Notably, ligands 1-3 (and 4-6) solely differ in the position of the N atom on the pyridine ring. Tiny though such a variation might seem, it clearly has a profound effect on the coordination mode and ability of the ligands.…”

Peculiar structural findings in coordination chemistry of malonamide–N,N′-diacetic acid

“…Oxamide-N,N 0 -diacetic acid has been widely employed to understand the magnetic interactions of 3d transition metal elements 2 and to synthesize coordination polymers. 3 However, the simple replacement of the oxalyl group with a malonyl group produces an organic ligand known as malonamide-N,N 0 -diacetic acid (LH 4 , Scheme 1), the coordination chemistry of which has so far been significantly less explored. 4 We have chosen to investigate the coordination abilities of this flexible ligand for several reasons.…”

Chiral 1D Metal–Organic Materials Based on Cu(II) and Amino Acid Schiff Bases

“…11−14 The advantages of this family of ligands are (i) the possibility of anchoring cations of different nature (ns, np, nd, and nf) in monodentate or chelating form by N-amino and O-carboxylate groups; (ii) the α position substituent being able to present different chemical functions, conferring additional donor centers or bulky template groups; 15 and (iii) the possibility to functionalize the molecular structure to obtain modified linkers with higher coordination capabilities, conserving the chiral nature of the α-amino acid such as oxamate, 16,17 amides, 18 oxamides, 19−21 or oxalyl retropeptide. 22 In this sense, the α-amino acid Schiff base ligand (aa-SB) is one of the most used strategies for the chemical obtainment of chiral ligands. 23 based on two multidentate aa-SB's starting from aspartic acid (L-Asp) or L-histidine (L-His) and pyridoxal (PL).…”

“…In this sense, from all the synthetic strategies, the direct use of an enantiopure organic ligand capable of transferring the chirality can guaranty the obtainment of the desired homochiral material . Mainly, amino acids have been used as molecular building blocks in this field. − The advantages of this family of ligands are (i) the possibility of anchoring cations of different nature ( n s, n p, n d, and n f) in monodentate or chelating form by N -amino and O -carboxylate groups; (ii) the α position substituent being able to present different chemical functions, conferring additional donor centers or bulky template groups; and (iii) the possibility to functionalize the molecular structure to obtain modified linkers with higher coordination capabilities, conserving the chiral nature of the α-amino acid such as oxamate, , amides, oxamides, − or oxalyl retro-peptide . In this sense, the α-amino acid Schiff base ligand ( aa -SB) is one of the most used strategies for the chemical obtainment of chiral ligands .…”