Département de chimie moléculaire

The authors have synthesized strongly emitting liq.-cryst. deriv. of Y3N@C80 that shows good soly. and remarkable photophys. properties. Oligo(phenyleneethynylene) (OPE) units act as 100 % efficient light-harvesting antennae to sensitize a bright and long-lived fullerene core emission. These luminescence properties are retained in the mesophase and coupled to a quite strong absorption in the visible region extending up to 750 nm, open up a variety of potential applications, for example near-IR luminescent sensors with time-gated detection to shut down fluorescence of the matrix or competing species. The grafting of the mesomorphic dOPE onto the fullerenes promotes mesomorphism in the fullerene adducts, with the induction of columnar phases resulting from the triple segregation between the fullerene (core), mesogens (walls), and chains (continuous medium) according to a Kagome lattice. [on SciFinder(R)]