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Self-assembly and host–guest interactions of Pd3L2 metallo-cryptophanes with photoisomerizable ligands

DOI: 10.1021/acs.inorgchem.1c01297 DOI Help

Authors: Edward Britton (University of Leeds) , Richard J. Ansell (University of Leeds) , Mark J. Howard (University of Leeds) , Michaele J. Hardie (University of Leeds)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorganic Chemistry , VOL 3

State: Published (Approved)
Published: August 2021
Diamond Proposal Number(s): 20570

Open Access Open Access

Abstract: New photoswitchable pyridyl-azo-phenyl-decorated tripodal host ligands (Laz) 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 π–π stacked layers. Trigonal bipyramidal {[Pd(en)]3(Laz)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 Pd–N bonds. The {[Pd(en)]3(Laz)2}6+ cages all act as hosts, binding octyl sulfate anions, or N-[2-(dimethylamino)ethyl]-1,8-naphthalimide in a dimethyl sulfoxide solution.

Journal Keywords: Palladium; Anions; Photoisomerization; Ligands; Nuclear magnetic resonance spectroscopy

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 10/08/2021 14:59


Discipline Tags:

Chemistry Inorganic Chemistry

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD)