POLYHEDRAL OLIGOMERIC SILSESQUIOXANE NANOCRYSTAL STABILIZATION LIGANDS

摘要

Quantum-dot binding ligands with silsesquioxane moieties are provided. The quantum-dot binding ligands include a multiplicity of amine or carboxy binding ligands in combination with silsesquioxane moieties providing improved stability for the ligated quantum dots. The ligands and coated nanostructures of the present invention are useful for close packed nanostructure compositions, which can have improved quantum confinement and/or reduced cross-talk between nanostructures.

主权项

1. A quantum dot binding-ligand having a structure according to Formula I wherein: A is a polyhedral oligomeric silsesquioxane (POSS) moiety comprising 6 to 12 silicon atoms; each group —O—Si(R1)2-L-(R2)q is bound to a silicon atom in the POSS moiety; each R1 is independently selected from the group consisting of H and C1-6 alkyl; each L is independently selected from the group consisting of C3-8 alkylene, C3-8 heteroalkylene, and C3-8 alkylene-(C(O)NH—C2-8 alkylene)q; each R2 is independently selected from the group consisting of C(O)OH and NR2aR2b, wherein R2a and R2b are each independently selected from the group consisting of H and C1-6 alkyl; each R3 is independently selected from the group consisting of C8-20 alkyl, C8-20 heteroalkyl, C8-20 alkenyl, C8-20 alkynyl, cycloalkyl, and aryl; the subscript m is an integer from 1 to 20; the subscript n is an integer from 1 to 20; and each subscript q is independently an integer from 1 to 10.