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Author
T.S. Koblenz
H.L. Dekker
C.G. de Koster
P.W.N.M. van Leeuwen
J.N.H. Reek
Year
2011
Title
Bis(metallo) capsules based on two ionic diphosphines
Journal
Chemistry - An Asian Journal
Volume | Issue number
6 | 9
Pages (from-to)
2431-2443
Document type
Article
Faculty
Faculty of Science (FNWI)
Institute
Van 't Hoff Institute for Molecular Sciences (HIMS)
Swammerdam Institute for Life Sciences (SILS)
Abstract
Self-assembly and characterization of heterodimeric diphosphine capsules formed by multiple ionic interactions are described. The first type of capsules is composed of one novel tetrasulfonato-xantphos ligand and one complementary tetraammonium calix[4]arene. Encapsulation of a transition metal is achieved by self-assembly of a rhodium complex containing the tetraanionic diphosphine ligand and a tetracationic calix[4]arene. The second type of capsules is composed of two oppositely charged diphosphine ligands: one tetrasulfonato-xantphos and one tetraammonium-diphosphine (of the xantphos-, DPEphos-, and 1,2-bis(diphenylphosphino)ethane (dppe)-type). Bis(metallo) capsules, that is, simultaneous encapsulation of two different transition metals, are created by self-assembly of a palladium or platinum complex containing a tetracationic ligand and a rhodium complex containing a tetraanionic ligand. Diphosphine ligands with different flexibilities and shapes assemble into metallocapsules with a proper capsular structure, as is indicated by 1H NMR and 1D-NOESY spectroscopy, ESIMS, and modeling studies.
URL
go to publisher's site
Language
English
Permalink
http://hdl.handle.net/11245/1.350014

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