Reversible cargo shipping between orthogonal stations of a nanoscaffold upon redox input.
The sterically shielded terpyridine was prepared, both as a new ligand and as part of the four-station nanoscaffold . Mixing of terpyridine , the parent phenanthroline and the shielded phenanthroline in the presence of Zn(2+) (1 : 1 : 1 : 1) furnished quantitatively the inverse HETTAP complex [Zn()()](2+) by self-sorting, while in the presence of Cu(+) the HETPHEN complex [Cu()()](+) was preferred (89%). Due to the akin coordination preferences of Cu(2+) and Zn(2+), the above self-sorting was implemented for Cu(+)/Cu(2+) on nanoscaffold , the latter equipped with the binding motifs of (PhenAr2) and (TerpyAr2). When was reacted with Cu(+) and phenanthroline () in a 1 : 2 : 2 ratio, only the PhenAr2 stations became involved in complex formation (= (Cu)phen). In contrast, upon oxidative formation of Cu(2+), ligand was exclusively moved to the TerpyAr2 stations ((Cu)terpy). Electrochemical oxidation-reduction prompted the cargo to be shipped reversibly on a subsecond time scale between the two different stations of .
Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Str. 2, D-57068 Siegen, Germany. schmittel@chemie.uni-siegen.de.
Soumen K
SK
Samanta
Anup
A
Rana
Michael
M
Schmittel
D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004563:Electrochemistry; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D010618:Phenanthrolines / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D056831:Coordination Complexes; D010618:Phenanthrolines; D011725:Pyridines; D003300:Copper; D015032:Zinc