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Updated: Feb 6, 2026

A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries
Published on: January 28, 2018
Twofold fused concave hosts containing two phosphorus atoms: modules for the sandwich-type encapsulation of
Masaki Yamamura1, Daigo Hongo1, Tatsuya Nabeshima1
1Graduate School of Pure and Applied Sciences , Tsukuba Research Center for Interdisciplinary Materials Science , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki , 305-8571 Japan . Email: myama@chem.tsukuba.ac.jp ;
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 of P2, containing two phosphorus atoms, towards fullerenes was significantly enhanced relative to P1 with one phosphorus atom.
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