Non-coplanar 9,9-diphenyl-substituted oligofluorenes with large two-photon absorption enhancement
The non-coplanar substituted phenyl rings at the 9-position of a fluorenyl unit can be involved in π-electron delocalization in which the resulting oligofluorenes exhibit a very large enhancement of two-photon absorption cross sections up to 2559 GM at 71
Wu, Po Lam,Xia, Ping Fang,Li, Zhong Hui,Feng, Xin Jiang,Tam, Hoi Lam,Li, King Fai,Jiao, Yong,Wong, Man Shing,Cheah, Kok Wai