Patent ID: 7190870

Claim:
A composite comprising: a plurality of semiconductor nanocrystals incorporated in an inorganic matrix including titanium; and a coordinating ligand associated with the semiconductor nanocrystal; wherein the coordinating ligand has the formula wherein k is 2,3 or 5, n is 1, 2, 3, 4 or 5, and m is 1 or 2, 3, 4, 5, 6, 7, 8, 9 or 10; X is O, S, S═O, SO 2 , Se, Se═O, N, N═O, P, P═O, As, or As═O; each of Y and L, independently, is a straight or branched C 2−12 hydrocarbon chain optionally containing at least one double bond, at least one triple bond, or at least one double bond and one triple bond, the hydrocarbon chain being optionally substituted with one or more C 1−4 alkyl, C 2−4 alkenyl, C 2−4 alkynyl, C 1−4 alkoxy, hydroxyl, halo, amino, nitro, cyano, C 3−5 cycloalkyl, 3−5 membered heterocycloalkyl, monocyclic aryl, 5−6 membered heteroaryl, C 1−4 alkylcarbonyloxy, C 1−4 alkyloxycarbonyl, C 1−4 alkylcarbonyl, or formyl and the hydrocarbon chain being optionally interrupted by -O-, -S-, -N(R e )-, -N(R e )-,-N(R e )-C(O)-O-, -O-C(O)-N(R e )-, -N(R e )-C(O)-N(R f )-, -O-C(O)-O-, -P(R e )-, or -P(O)(R e )-; each of R e and R f , independently, is hydrogen, alkyl, alkenyl, alkynyl, alkoxy, hydroxylakyl, hydroxyl, or haloalkyl; and Z is hydroxy, sulfhydryl, sulfinate, sulfinic acid, sulfonate, sulfonic acid, disulphide, carboxyl, carboxylate, amine, amide, alkoxysilyl, halosilyl, phosphate, phosphonic acid, phosphonate ester, phosphinate, phosphinic acid, or phosphinate ester.