757964-80-0Relevant academic research and scientific papers
Bis(metallo) capsules based on two ionic diphosphines
Koblenz, Tehila S.,Dekker, Ing. Henk L.,De Koster, Chris G.,Van Leeuwen, Piet W. N. M.,Reek, Joost N. H.
, p. 2431 - 2443 (2011)
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. Copyright
