| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 봄 (04/09 ~ 04/10, 대전컨벤션센터) |
| 권호 |
34권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
The Impact of Chemical oxidation and Resonance enhancement on the Two-photon absorption cross section of Ladder-type Pentaphenylene and Fluorene derivatives |
| 초록 |
Two-photon absorption (TPA) properties of ladder-type pentaphenylene (LPP) oligomers and fluorene derivatives have been investigated. The LPP series found to have largerσ2 than the fluorene series with the same kind of donors. The LPP oligomers exhibit a nonlinear increase inσ2 against the number of the LPP repeating unit; the trimer-core compounds exhibits the peakσ2 value of 3400 GM (at 710 nm), which is 3.6 times as large as that of the monomer-core compound. Furthermore, it was found that the dication of the LPP-monomer-core compound generated by addition of antimony pentachloride as an oxidant shows a dramatically enhanced TPA transition (8900 GM) at 899 nm, which is nearly one order of magnitude larger than that of neutral one (940 GM at 676 nm). This drastic change on chemical oxidation is considered to originate from a resonance enhancement by the intense charge transfer (CT) band appeared for the dication in the NIR region. |
| 저자 |
조남철1, Gang Zhou2, Kenji Kamada3, 진성호4, Klaus Mllen2, 이광섭1
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| 소속 |
1한남대, 2Max Plank Institute for Polymer Research, 3National Institute of Advanced Industrial Science and Technology (AIST), 4부산대 |
| 키워드 |
two-photon absorption; pentaphenylene; cation
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| E-Mail |
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