Twofold fused concave hosts containing two phosphorus atoms: modules for the sandwich-type encapsulation of fullerenes in variable cavities.

ABSTRACT: The design and synthesis of extended concave host P2 by fusion of two concave phosphorus-containing units is reported. Co-crystallization of P2 and the fullerene guests C₆₀ and C₇₀ afforded the 2 : 1 host-guest complexes (P2)₂ ⊃ C₆₀ and (P2)₂ ⊃ C₇₀, in which the two concave surfaces of P2 encapsulate the convex surface of the fullerenes in a sandwich fashion. Interestingly, the orientation of the two P2 molecules with respect to each other was observed to be flexible, resulting in the formation of a variety of cavity shapes. MALDI-TOF mass, NMR, and UV-vis absorption spectra supported the formation of host-guest complexes between P2 and the fullerenes in solution. The affinity

SUBMITTER: Yamamura M 

PROVIDER: S-EPMC6054080 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature