ic400751n_si_002.zip (101.15 kB)
A Trigonal Prismatic Ligand in the Metal-Mediated Self-Assembly of One- and Two-Dimensional Metallosupramolecular Polymers
dataset
posted on 2013-08-19, 00:00 authored by Wen-Jing Hu, Long-Qing Liu, Ming-Liang Ma, Xiao-Li Zhao, Yahu A. Liu, Xian-Qiang Mi, Biao Jiang, Ke WenA novel
trispyrazine-pillared prismatic bicycooxacalixaromatic ligand L is synthesized, and its application in metal-mediated self-assembly
is described. Under self-assembly conditions, single chain, double-stranded
cross-linked coordination polymer and two-dimensional (2D) coordination
polymeric networks were formed via M-L (Ag+, Cu2+, and Zn2+) coordinative interactions.
Structural analyses revealed that the antiparallelly arranged one-dimensional
coordination polymers (Cu2+ and Zn2+) are arranged
to generate well-defined voids to host aromatic guests (benzene) via
C–H···π and π···π
interactions, while the double-stranded cross-linked coordination
polymer (Ag+) contains a rhomboidal [Ag2(L3)2] (L3: tridentate ligand) cage motif to include a benzene guest;
the “thicker” (thickness: ac 5 Å)
2D coordination polymeric networks (Ag+, Cu2+, and Zn2+), however, are all formed by connection of
one or two kinds of topologically different metallomacrocyclic cage
units. These unique metallomacrocyclic cage units in the 2D coordination
polymeric networks are capable of hosting different guest species.
For instance, the rhomboidal [M2(L3)2] (M = Ag+, Cu2+) cage units
were found to host a benzene or a nitrate anion; a hexahedral [M3(L3)3] (M = Ag+) cage was found to host a ligand L or a DMF molecule;
the hexahedral [M4(L3)4]
(M = Cu2+) cage was found to host four solvent molecules
of benzene; and the rectangular [M3(L3)3] (M = Cu2+, Zn2+) cage
units, however, were found to host two THF molecules. The results
highlight the potential of ligand L for applications
in the construction of “thicker” 2D coordination polymeric
networks with well-defined metallomacrocyclic cage units capable of
hosting various guest species.
