Sulfate ion encapsulation in caged supramolecular structures assembled by second-sphere coordination
Literature Information
Jianjun Liang, Jin Yang, Chuandong Jia, Hongrui Zhang, Ning Tang, Christoph Janiak
A tripodal tris(3-pyridylurea) receptor (L) assembles with metal sulfate salts MSO4 (M = Mn, Zn) to afford supramolecular cages [SO4⊂L2] that encapsulate the SO42− ion via multiple hydrogen bonds in a three-dimensional structure held by second-sphere coordination; 1H NMR and negative-ion mode ESI-MS spectra reveal significantly strong sulfate binding in solution.
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