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Catenation and encapsulation induce distinct reconstitutions within a dynamic library of mixed-ligand Zn

DOI: 10.1039/C5SC04906G DOI Help

Authors: Samuel Black (University of Cambridge) , Daniel Martin Wood (University of Cambridge) , Felix B Schwarz (Freie Universit├Ąt Berlin) , Tanya Ronson (University of Cambridge) , Julian J Holstein (University of Cambridge) , Artur Ryszard Stefankiewicz (University of Cambridge) , Christoph A. Schalley (Freie Universit├Ąt Berlin) , Jeremy Sanders (University of Cambridge) , Jonathan Nitschke (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemical Science

State: Published (Approved)
Published: January 2016
Diamond Proposal Number(s): 8464

Open Access Open Access

Abstract: Two new Zn4L6 cages composed of diamine subcomponents containing either naphthalene diimide (NDI) or porphyrin moieties are described. Their structural differences allow these cages to exhibit distinct interactions with different chemical stimuli, yielding different supramolecular products. The electron-poor NDIs of the first cage were observed to thread through electron-rich aromatic crown-ether macrocycles, forming mechanically-interlocked species up to a [3]catenane, whereas the porphyrin ligands of the second cage interacted favourably with C70, causing it to be bound as a guest. When mixed, the two cages were observed to form a dynamic combinatorial library (DCL) of seven constitutionally distinct mixed-ligand Zn4L6 cages. The DCL was observed to reconstitute in opposing ways when treated with either the crown ether or C70: the electron-rich macrocycle templated the formation of heteroleptic catenanes, whereas C70 caused the DCL to self-sort into homoleptic structures.

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 25/01/2016 15:18

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