Patent ID: 7993747

Claim:
A light-emitting composition comprising a plurality of lumophore-functionalized nanoparticles of formula I; wherein: core is a nanoparticle core; A 1 and A 2 are each a lumophore; L 1 and L 2 are each a linking group, wherein at least L 2 is branched; m is 0 or an integer in the range of 1 to 10; n is an integer in the range of 1 to 10; p is an integer in the range of 0 to 5 m ; q is an integer in the range of 1 to 5 n ; x is 0 or an integer in the range of 1 to 100; wherein for x≧2 each L 1 can be the same or different and each A 1 can be the same or different; y is an integer in the range of 1 to 100; wherein for y≧2 each L 2 can be the same or different and each A 2 can be the same or different; with the proviso that L 1 and L 2 are topologically distinct from the core, compositionally distinct from the core, or both; and provided that there are at least two lumophores, and at least one lumophore emits light having a wavelength different from the wavelength emited by at least one other lumophore.