Issue 2, 2015

Large, heterometallic coordination cages based on ditopic metallo-ligands with 3-pyridyl donor groups

Abstract

Ditopic N-donor ligands with terminal 4-pyridyl groups are omnipresent in coordination-based self-assembly. The utilization of ligands with 3-pyridyl donor groups is significantly less common, because the intrinsic conformational flexibility of these ligands tends to favor the formation of small aggregates. Here, we show that large Pd6L1212+ cages can be obtained by reaction of Pd(II) salts with metallo-ligands L bearing terminal 3-pyridyl groups. The easy-to-access metallo-ligands contain an Fe(II) clathrochelate core. These sterically demanding clathrochelate complexes prevent the formation of smaller aggregates, which is observed for less bulky analogous building blocks. The cages were shown to bind BF4 and BPh4 anions in aqueous solvent mixtures, whilst the lateral size of the clathrochelate significantly affects their guest encapsulation behavior.

Graphical abstract: Large, heterometallic coordination cages based on ditopic metallo-ligands with 3-pyridyl donor groups

Supplementary files

Article information

Article type
Edge Article
Submitted
03 Oct 2014
Accepted
03 Nov 2014
First published
11 Nov 2014
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2015,6, 1004-1010

Author version available

Large, heterometallic coordination cages based on ditopic metallo-ligands with 3-pyridyl donor groups

M. D. Wise, J. J. Holstein, P. Pattison, C. Besnard, E. Solari, R. Scopelliti, G. Bricogne and K. Severin, Chem. Sci., 2015, 6, 1004 DOI: 10.1039/C4SC03046J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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