Large Synthetic Molecule that either Folds or Aggregates through Weak Supramolecular Interactions Determined by Solvent.

ABSTRACT: Weak noncovalent interactions between large disclike molecules in poorly solvating media generally lead to the formation of fibers where the molecules stack atop one another. Here, we show that a particular chiral spacing group between large aromatic moieties, which usually lead to columnar stacks, in this case gives rise to an intramolecularly folded structure in relatively polar solvents, but in very apolar solvents forms finite aggregates. The molecule that displays this behavior has a C ₃ symmetric benzene-1,3,5-tris(3,3'-diamido-2,2'-bipyridine) (BTAB) core with three metalloporphyrin units appended to it through short chiral spacers. Quite well-defined chromophore arrangements are evident by circular dichroism (CD) spectroscopy of this compound in solution, where cl

SUBMITTER: Oliveras-Gonzalez C 

PROVIDER: S-EPMC6648001 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature