SEARCH Articles Figures Tables 9,10-Dicyanoanthracene sensitizer isomerization Cis-trans isomerization benzophenone sensitized Cis-trans isomerization triplet-sensitized Isomerization surface-structure sensitivity Isomerization triplet-sensitized Sensitized butene - 2 isomerizations Sensitized cis-trans isomerization Triplet state isomerizations biacetyl sensitized