Photoinduced electron transfer in covalently linked 1,8-naphthalimide/viologen systems
A series of polymethylene-linked 1,8-naphthalimide/viologen diads has been synthesized. The number of intervening methylenes was varied from 2 to 6. For comparison, a series of W-alkylpyridiniumyl-1,8-naphthalimide "parent" compounds was prepared and phot