2,9-dibromo-4a,6a-dihydro-1,10-phenanthroline-5,6-dione
2,9-bis-(4-methoxy-phenyl)-1,10-phenanthroline
2,9-di(pyridin-2-yl)-1,10-phenanthroline
6,6’-(1,10-phenanthrolin-2,9-diyl)-2,2’-di(N-hexyl-N-phenyl)picolinamide
6,6’-(1,10-phenanthrolin-2,9-diyl)-2,2’-di(N-ethyl-N-phenyl)picolinamide