  A photo-polymerization initiator based on an imidazolium and an oxometalate,
viz., (BMIm)2(DMIm) PW12O40 (where, BMIm = 1-butyl-3-methylimizodium, DMIm =
3,3'-Dimethyl-1,1'-Diimidazolium) is reported. It polymerizes several
industrially important monomers and is recoverable hence can be reused. The Mn
and PDI are controlled and a reaction pathway is proposed.
