Abstract: Provided are: a compound used as a capping agent which imparts particles having excellent dispersibility and refractive index; particles coated with the compound; a method for producing the same; and a dispersion composition containing said particles. A compound according to the present invention has a structure represented by formula (1). In the formula, R1 represents an organic group having 1-30 carbon atoms, R2 represents a group represented by OR3 or a group represented by formula (2), R3 represents an organic group having 1-30 carbon atoms, n1 and n2 each represent an integer of at least 0, n1+2×n2 represents a valence determined by the type of L, L represents aluminum, gallium, yttrium, titanium, zirconium, hafnium, bismuth, tin, vanadium, or tantalum, * represents a bond, R4 and R5 each represent an organic group having 1-30 carbon atoms which may have an oxygen atom. Particles according to the present invention have a structure represented by formula (1) on a surface thereof.

Abstract: Provided are a composition for metal oxide film formation, a method for producing the composition for metal oxide film formation, and a method for producing a metal oxide film using the composition for metal oxide film formation, which allow for a decrease in amount of residual metals after washing.

Abstract: A metal oxide film-forming composition including a tertiary alkyloxycarbonyloxy group-containing aromatic hydrocarbon ring-modified fluorene compound represented by Formula (1) below; metal oxide nanoparticles surface-treated with a capping agent; and a solvent.