Substituted benzoyl ferrocene-based anionic photoinitiator

(57) Abstract: The present invention is an anionic photoinitiator compound having the structure (1), compositions containing these compounds, and methods of using these compounds. However, in the structure (1), X and Y are independently a direct single bond and -C (= O) - is selected from the group consisting of, at least one of the -C where X and Y (= O) - by and; R The anionic photoinitiators, polymerizable or crosslinkable monomer species, without losing photosensitive even when stored with oligomeric species or crosslinkable polymeric species, with improved storage stability.