Patent ID: 7977452

Claim:
A dendritic polymer that is a Janus dendrimer comprising at least two dissimilar dendrons joined at their core, with or without a connecting group, wherein at least two of the dendrons provide, a heterobifunctional character and at least one dendron is a PEHAM dendron, wherein the PEHAM dendron comprises: a) interior functionality formed from a ring opening reaction that can covalently bind carried materials at lower generations; and b) optionally, extender present in its layered growth that increases its void volume at lower generations; and c) a different reactivity than other dendrons used in the Janus dendrimer due to its NSIS properties; and d) formed by use of click reactions; and e) holds carried material at lower generations than other dendrimers due to its interior functionality and larger void volume at a lower generation; and g) has greater amplification; and h) has more functionality per gram of material; and where the dendron possesses focal point functional (FF) groups selected from the group consisting of epoxy, aziridine, episulfide, activated Michael's addition olefins, and oxazolines that may be suitable for click chemistry ligations, or possesses an organic azide or a terminal alkyne group at the focal point functionality (FF) suitable for 1,3-dipolar cyclo-addition reactions.