Provided is a high-refractive composition comprising: an organic oligosiloxane of a network structure containing a metal, in which Si is partly substituted by a metal so as to contain a metal; and a photocurable acrylate-based compound, wherein the metal comprises at least one selected from a group consisting of titanium, zirconium and a combination thereof. Further provided are an anti-reflective film and a production method thereof, the anti-reflective film comprising a high-refractive layer which is formed by photocuring the high-refractive composition.

The present invention aims to reduce excess scattering in light emitting arrangements. A composition comprising a transparent matrix comprising an anionic organic moiety, and metal cations dispersed in the matrix is disclosed. The anionic organic moiety and the metal cations form an organometallic complex, and wherein the metal cations are capable of forming transparent nano-crystals upon contact with an agent comprising at least one element selected from the group consisting of sulfur and selenium. Also an optical composition comprising a transparent matrix comprising an organic moiety residue, and unmodified nanocrystals is disclosed. Further, a method of preparing an optical composition comprising the steps of: providing a transparent matrix comprising an anionic organic moiety; dispersing metal cations into the matrix; and contacting the organometallic complex with an agent in order to in situ convert at least part of the metal cations into transparent nanocrystals. Preferably the matrix is a silicone or a polysiloxane and silicone rubber mixture.

The present invention aims to reduce excess scattering in light emitting arrangements. A composition comprising a transparent matrix comprising an anionic organic moiety, and metal cations dispersed in the matrix is disclosed. The anionic organic moiety and the metal cations form an organometallic complex, and wherein the metal cations are capable of forming transparent nano-crystals upon contact with an agent comprising at least one element selected from the group consisting of sulfur and selenium. Also an optical composition comprising a transparent matrix comprising an organic moiety residue, and unmodified nanocrystals is disclosed. Further, a method of preparing an optical composition comprising the steps of: providing a transparent matrix comprising an anionic organic moiety; dispersing metal cations into the matrix; and contacting the organometallic complex with an agent in order to in situ convert at least part of the metal cations into transparent nanocrystals. Preferably the matrix is a silicone or a polysiloxane and silicone rubber mixture.

A curable composition containing an alkoxysilylalkylaminopropyl-modified polysiloxane compound of the following general formula (1) and a hydrolyzable group-containing organosilicon compound: ##STR00001##
wherein R.sup.1s each independently represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, R.sup.2 and R.sup.3 each independently represent an unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.4 represents a divalent hydrocarbon group having 1 to 20 carbon atoms, which may contain a sulfur atom, a silicon atom, an ester bond or a urea bond, p is an integer of 1 to 1000, q is 0 or 1, r is 0, 1 or 2, and X represents a group of the following general formula (2) or R.sup.1.sub.3Si: ##STR00002##
wherein R.sup.2 to R.sup.4, q and r represent the same meaning as described above.