Application of polyfunctional ligands for improving performance and stability of quantum dot inks

A nanostructure composition, comprising:

• (a) at least one population of nanostructures;
• (b) a polyfunctional poly(alkylene oxide) ligand bound to the nanostructures;
• and
• (c) at least one organic resin.

A method of replacing a first ligand on a nanostructure with a second ligand, the method comprising admixing a reaction mixture comprising a population of nanostructures having the first ligand non-covalently bound to the nanostructure and a polyfunctional poly(alkylene oxide) ligand which is the second ligand, such that the second ligand displaces the first ligand and becomes non-covalently bound to the nanostructure, wherein the polyfunctional poly(alkylene oxide) ligand has formula I:

• wherein:
• x is 1 to 100;
• y is 0 to 100;
• R1A and R1B independently are H or C1-20 alkyl;
• X1 is a linear or branched C1-20 alkyl substituted by at least one —OH, —SH, —NH2, —CO2H, —P(O)(OH)2, —P(O)OH, or —SO3H;
• X2 is a C1-12 alkylene;
• X3 is a bond or C1-12 alkylene;
• X4 is a bond, —O—, —OC(═O)—, or amido;
• and
• X5 is a linear or branched C1-20 alkyl substituted by at least one —OH, —SH, —NH2, —CO2H, —P(O)(OH)2, —P(O)OH, or —SO3H.