Patent ID: 8901355

Claim:
A dendrimer comprising: a core comprising 2 or more terminal residues and derived from a polyvalent organic molecule; from 1 to 8 generations emanating radially from the core, the 1 to 8 generations comprising: from 0 to 7 interior generations comprising 2 or more molecular units independently having formula A: wherein R 1 and R 2 are independently H or C 1 -C 10 alkyl, or R 1 and R 2 , together with the carbon to which they are attached, form a C 3 -C 12 cycloalkyl ring optionally substituted with C 1 -C 6 alkyl, and R 3 is H, C 1 -C 10 alkyl, or phenyl, and wherein the innermost interior generation is attached to the core through the terminal residues; an exterior layer attached to the outermost of the interior generations or to the core through the terminal residues if no interior generations are present, the exterior layer comprising 2 or more molecular units independently having formula B: wherein R 4 and R 5 are each H, or R 4 , R 5 and the nitrogen to which they are attached form a NO 2 group, wherein the terminal residues are amine residues.