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Communication
Chem. Commun., 2009, 6762 - 6764, DOI: 10.1039/b912745c
Two-photon absorption properties of heterafluorenes and spirobiheterafluorenes bearing aminostyryl arms
Tomohiro Agou, Md. Delwar Hossain, Takayuki Kawashima, Kenji Kamada and Koji Ohta
A phosphoniafluorene and a spirobiphosphoniafluorene bearing 4-(diethylamino)styryl groups were synthesized. These compounds exhibited bathochromically shifted absorption and emission, compared with their silicon analogues, because of the strong acceptor property of the phosphonium core. They also showed enhanced two-photon absorptions at around 930 nm.
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