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Materials 2014, 7(1), 287-301; doi:10.3390/ma7010287
Article

Self-Assembled M2L4 Nanocapsules: Synthesis, Structure and Host-Guest Recognition Toward Square Planar Metal Complexes

1,2
,
1,2
,
3
,
1,2
 and
1,2,*
1 Sorbonne Universités, UPMC Univ Paris 06, Université Pierre et Marie Curie, Institut Parisien de Chimie Moléculaire (IPCM) UMR 8232, 4 place Jussieu, 75252 Paris cedex 05, France 2 CNRS, Centre National de la Recherche Scientifique, Institut Parisien de Chimie Moléculaire (IPCM) UMR 8232, 4 place Jussieu, 75252 Paris cedex 05, France 3 NMR Services of Ecole Nationale Supérieure de Chimie de Paris, Institut de Recherche de Chimie Paris (IRCP) UMR 8247, Chimie-ParisTech, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
Dedicated to Dr. Michel Gruselle on the occasion of his 69th birthday.
* Author to whom correspondence should be addressed.
Received: 1 October 2013 / Revised: 28 November 2013 / Accepted: 17 December 2013 / Published: 9 January 2014
(This article belongs to the Special Issue Supramolecular Cage Complexes)
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Abstract

Metallosupramolecular cages of the general formulas [M2(L)4][X]4 can be self-assembled in good yields, where M = Pd, X = NO3, L = L1 (1a); M = Pd, X = OTf, L = L1 (1b); M = Pt, X = OTf, L = L1 (2); M = Pd, X = OTf, L = L2 (3); L1 = 1,3-bis(pyridin-3-ylethynyl)-5-methoxybenzene; and L2 = 2,6-(pyridin-3-ylethynyl)- 4-methoxyaniline, respectively. These cages have been fully characterized using 1H, 13C NMR, elemental analysis, IR spectroscopy, and electrospray mass spectrometry. Additionally the molecular structure of [Pd2(L1)4][OTf]4 (1b) was confirmed using single crystal X-ray diffraction. The capacity of central cavities of M2L4 cages to accommodate square planar metal complexes was investigated. In particular, the tetracationic cage [Pd2(L2)4][OTf]4 (3) was found to encapsulate the anionic metal complex [PtCl4]2− through electrostatic interactions and also via hydrogen bonding with the amino groups of the bridging ligand displayed by this nanocage.
Keywords: palladium; self-assembly; tetragonal cages; host-guest palladium; self-assembly; tetragonal cages; host-guest
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Desmarets, C.; Ducarre, T.; Rager, M.N.; Gontard, G.; Amouri, H. Self-Assembled M2L4 Nanocapsules: Synthesis, Structure and Host-Guest Recognition Toward Square Planar Metal Complexes. Materials 2014, 7, 287-301.

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