Peripheral Templation Generates an M(II) 6 L4 Guest-Binding Capsule.
Pseudo-octahedral M(II) 6 L4 capsules result from the subcomponent self-assembly of 2-formylphenanthroline, threefold-symmetric triamines, and octahedral metal ions. Whereas neutral tetrahedral guests and most of the anions investigated were observed to bind within the central cavity, tetraphenylborate anions bound on the outside, with one phenyl ring pointing into the cavity. This binding configuration is promoted by the complementary arrangement of the phenyl rings of the intercalated guest between the phenanthroline units of the host. The peripherally bound, rapidly exchanging tetraphenylborate anions were found to template an otherwise inaccessible capsular structure in a manner usually associated with slow-exchanging, centrally bound agents. Once formed, this cage was able to bind guests in its central cavity.
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Felix J
FJ
Rizzuto
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.|College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211800, P.R. China).
Wen-Yuan
WY
Wu
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Tanya K
TK
Ronson
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK. jrn34@cam.ac.uk.
Jonathan R
0000-0002-4509-4579
JR
Nitschke
host-guest chemistry; platonic solids; self-assembly; supramolecular chemistry; templation