Self-organization has been found out in the crystals of the metal complexes (Cu (II), Pd (II) ) with arginine (Arg) or glutamate (Glu) . The [Cu (L-Arg)
2] -X and [Cu (D-Arg)
2] -X (X=isophthalate, pyridine-2, 6-dicarboxylate, pyridine-3, 5-dicarboxylate) revealed infinite right- and left-handed double-helical structures, respectively. The [Cu (Arg)
2] -X (X=SO
42-) afforded a single-helical structure, and [Cu (Arg)
2] -X (X=terephthalic acid, pyromellitic acid) gave a layer structure. It indicates that self-organizations in these systems are controlled by dianions. The reaction of [Pd (Arg)
2]
2+complex with isophthalate has also been examined in DMSO-d
6 by
1H- and
13C-NMR spectroscopies, in which the molecular process of self assembly in the [Cu (L-Arg)
2] -isophthalate system was successfully followed. Furthermore, the [Pd (L-/D-Glu) (H
2O) ] (H
2O) complexes formed infinite left- and right-handed single-helical structures, respectively, which exhibited not only self-organization but also self-recombination.
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