Patent ID: 8652360
Filing Date: 2014-02-18
Classification: B82Y,C07D,G01N

Abstract:
1. A method for surface-modifying a semiconductor nanocrystal, comprising: providing a semiconductor nanocrystal comprising an organic coating layer at an outer surface of the nanocrystal, the organic coating comprising at least one reactive group G1 that reacts according to a click chemistry cycloaddition reaction; providing an adjoining material comprising at least one G2 group at a surface of the adjoining material, the G2 group being complementary to the G1 group in the click chemistry cycloaddition reaction; and bringing the nanocrystal together with the adjoining material under conditions favorable to the interaction of the G1 group and the G2 group; wherein: the G1 group is an azide and the G2 group is a strained cycloalkynyl radical, or the G2 group is an azide and the G1 group is a strained cycloalkynyl radical; and the organic coating layer of the semiconductor nanocrystal comprises at least one specific ligand given by the general formula (I): in which: L is a chelating ligand selected from the group consisting of phosphine, phosphine oxides, fatty chains having an end amine, fatty chains having an end carboxylic acid, fatty chains having an end thiol functional group, a 1,1-dithiolate group, and a 1,1-diselenoate group; E is an organic spacer group given by the general formula (II): where R R represents: X represents a reaction product of one reactive functional group present on the chelating ligand L and a complementary reactive functional group present on the organic spacer group E; A represents a single bond or a group chosen from the group consisting of —CONH, —NHCO—, —OCH G1 represents a strained cycloalkynyl or azide radical.