Journal
INORGANIC CHEMISTRY
Volume 60, Issue 17, Pages 12912-12923Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c01297
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Funding
- EPSRC [1799710, EP/R00661X/1]
- Diamond Light Source [MT-20570]
- EPSRC [1799710] Funding Source: UKRI
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New photoswitchable pyridyl-azo-phenyl-decorated tripodal host ligands (L-az) have been synthesized, showing a remarkable 7-fold Borromean-weave entanglement and forming metallo-cryptophanes cages with less robust photoswitching behavior.
New photoswitchable pyridyl-azo-phenyl-decorated tripodal host ligands (L-az) that belong to the cyclotriveratrylene family have been synthesized, and their photoswitching behavior and crystal structures determined. The latter includes a remarkable 7-fold Borromean-weave entanglement of pi-pi stacked layers. Trigonal bipyramidal {[Pd(en)](3)(L-az)(2)}(6)+ metallo-cryptophanes (en = ethylenediamine) were formed from these and a previously known pyridyl-azo-phenyl-decorated tripodal host ligand. These coordination cages dissociate at low concentrations and are less robust to photoswitching of the Laz ligands than were previously reported Ir(III)-linked metallo-cryptophanes with similar ligands, reflecting the greater lability of the PdN bonds. The {[Pd(en)](3)(L-az)(2)}(6+) cages all act as hosts, binding octyl sulfate anions, or N-[2-(dimethylamino)ethyl]-1,8-naphthalimide in a dimethyl sulfoxide solution.
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