Chemistry Letters, Vol.30, No.10, 970-971, 2001
Synthesis and fluorescence emission behavior of anti-[2.3](3,10)phenanthrenophane: overlap between phenanthrene rings required for excimer formation
Novel anti- [2.3](3,10)phenanthrenophane 3, prepared by the intramolecular [2 + 2] photocycloaddition of 1,3-bis(3-vinyl-10-phenanthryl)propane, exhibited monomer fluorescence. This is in a remarkable contrast with the excimer fluorescence emission from anti- [2.3] (3,9)phenanthrenophane 2 with slightly larger overlap between phenanthrene rings than in anti-3.