Self-assembly of the ligand L1 with Co2+ into a dinuclear triple helicate [Co2(L1)3]4+ produces an anion binding pocket which encapsulates perchlorate anions. Furthermore we demonstrate how this ability to bind anions can control ligand self-recognition properties.
Harding, L. P., Jeffery, J. C., Riis-Johannessen, T., Rice, C. R., & Zeng, Z. (2004). Anion control of ligand self-recognition in a triple helical array. Chemical Communications, 10(6), 654-655. https://doi.org/10.1039/B313218H