Author/Authors :
Tero-Kubota، نويسنده , , Shozo and Miyamoto، نويسنده , , Tatsuya and Akiyama، نويسنده , , Kimio and Ikegami، نويسنده , , Yusaku and Mataka، نويسنده , , Shuntaro and Tashiro، نويسنده , , Masashi، نويسنده ,
Abstract :
Both a quinoxaline-annelated dimer and a naphthalene-annelated dimer showed excimer-type fluorescence spectra. Excimer-type phosphorescence was observed for the quinoxaline dimer, while the phosphorescence of the naphthalene dimer was not much different from that of the monomer type. In contrast, the EPR spectra clearly showed delocoalization of the unpaired spins in the two chromophores for both molecules. The present results can be interpreted by the models of coherent supermolecule delocalization of the unpaired spins and incoherent hopping of triplet exciton for the quinoxaline and naphthalene dimers, respectively.
