Sulfate ion encapsulation in caged supramolecular structures assembled by second-sphere coordination.
A tripodal tris(3-pyridylurea) receptor (L) assembles with metal sulfate salts MSO(4) (M=Mn, Zn) to afford supramolecular cages [SO(4) subset L(2)] that encapsulate the SO(4)(2-) ion via multiple hydrogen bonds in a three-dimensional structure held by second-sphere coordination; (1)H NMR and negative-ion mode ESI-MS spectra reveal significantly strong sulfate binding in solution.
Wu
Biao
B
State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lonzhou 730000, China. wubiao@lzb.ac.cn
Liang
Jianjun
J
Yang
Jin
J
Jia
Chuandong
C
Yang
Xiao-Juan
XJ
Zhang
Hongrui
H
Tang
Ning
N
Janiak
Christoph
C