Journal
CHEMICAL SCIENCE
Volume 8, Issue 3, Pages 1901-1908Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sc04732g
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Funding
- Swiss National Science Foundation
- Marie Curie Initial Training Network ReAD
- Marie Curie Initial Training Network Dynamol
- Marie Curie Initial Training Network ResMoSys
- Ecole Polytechnique Federale de Lausanne (EPFL)
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The utilization of large ligands in coordination-based self-assembly represents an attractive strategy for the construction of supramolecular assemblies more than two nanometers in size. However, the implementation of this strategy is hampered by the fact that the preparation of such ligands often requires substantial synthetic effort. Herein, we describe a simple one-step protocol, which allows large -bipyridyl ligands with a bent shape to be synthesized from easily accessible and/or commercially available starting materials. The ligands were used to construct (Pd2L4)-L-II-type coordination cages of unprecedented size. Furthermore, we provide evidence that these cages may be stabilized by close intramolecular packing of lipophilic ligand side chains. Packing effects of this kind are frequently encountered in protein assemblies, but they are seldom used as a design element in metallasupramolecular chemistry.
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