Colored charge-transfer complexes from N,N-dimethyl-p-toluidine.
Yellow mixtures form on adding essentially colorless N,N-dimethyl-p-toluidine (DMPT) to colorless methacrylate monomers containing phthalate, isophthalate, or terephthalate diester groups. The color-causing interactions between the amines and monomers were investigated using ultraviolet spectroscopy. Equations were derived from predicting interactions between formulation ingredients and DMPT that would lead to undesired color.
D003116:Color; D003510:Cyclohexanes / Q000378:metabolism*; D003764:Dental Materials / Q000378:metabolism; D004583:Electrons; D004735:Energy Transfer; D010795:Phthalic Acids / Q000378:metabolism*; D013056:Spectrophotometry, Ultraviolet; D014052:Toluidines / Q000378:metabolism*
D003510:Cyclohexanes; D003764:Dental Materials; D010795:Phthalic Acids; D014052:Toluidines