Bromo-PEG6-azide consist of a bromide(Br), a terminal azide(N3) and a PEG6 spacer. PEG spacer increases solubility in aqueous media. The bromide (Br) is a good leaving group for nucleophilic substitution. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage.
