Camphorquinone/amine photoinitiating systems, due to their high efficiency to initiate photopolymerisation reactions of dental resins (e.g. blend of bisphenol A glycerolate dimethacrylate and triethylene glycol dimethacrylate) upon the exposure to blue light, have been widely used in dental materials. However, the residue and photochemical products of the photoinitiating systems can be toxic and mutagenic and thus harmful to our well-being. It is desirable to design and develop non-toxic and biocompatible systems for dental materials. This project aims to synthesize blue-light-sensitive photoinaddimers (i.e. a compound with the roles of a photoinitiator, an additive, and a monomer in one single molecule) to overcome the drawbacks and investigate their performance in dental materials.