Li, Q., Qiu, S., Zhang, Y., Xue, S., Tao, Z., Prior, T. J., …Xiao, X. (in press). Supramolecular assemblies constructed from inverted cucurbit[7]uril and lanthanide cations: synthesis, structure and sorption properties. RSC advances, 6(81), 77805-77810. https://doi.org/10.1039/c6ra15559f