Sj. Hartman et al., Frameworks of amino acids: synthesis and characterization of two zinc phosphono-amino-carboxylates with extended structures, CHEM COMMUN, (13), 2000, pp. 1213-1214
Two alpha-amino acids, 3-phosphono-2-aminopropionic and 4-phosphono-2-amino
butyric, are used to link zinc atoms in three-dimensional structures where
the three phosphonic and one of the carboxylic oxygen atoms coordinate to t
he metal, while the protonated amino groups and the second carboxylic oxyge
n atom are not coordinated and remain terminal in the voids of the framewor
k.