Light-Harvesting Fullerene Dyads as Organic Triplet Photosensitizers for Triplet−Triplet Annihilation Upconversions

Light-Harvesting Fullerene Dyads as Organic Triplet Photosensitizers
for Triplet−Triplet Annihilation Upconversions
Wanhua Wu, Jianzhang Zhao,* Jifu Sun, and Song Guo 

http://pubs.acs.org/doi/abs/10.1021/jo300613g 

In this work, C60 is introduced as a general structural motif to induce heavy atom-free ISC.  This ISC is used to do triplet-triplet annihilation upconversion.