Large two-photon absorption (TPA) cross-section of directly linked fused diporphyrins |
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| Authors: | Kim Deok Yun Ahn Tae Kyu Kwon Jung Ho Kim Dongho Ikeue Takahisa Aratani Naoki Osuka Atsuhiro Shigeiwa Motoyuki Maeda Shuichi |
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| Affiliation: | Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University, Seoul 120-749, Korea. |
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| Abstract: | The excited state dynamics and two-photon absorption properties of four novel triply linked porphyrin dimers in toluene have been investigated. The fused porphyrin dimers exhibit extremely increased two-photon absorption cross-section values (12,000-15,000 GM) compared with porphyrin monomers owing to much enhanced pi-electron delocalization throughout the porphyrin dimer ring. |
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