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Please use this identifier to cite or link to this item:
http://ir.ncue.edu.tw/ir/handle/987654321/16744
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| Title: | Low-Lying Two-Photon Excitations in Poly(p-phenylene Vinylene) and Its Derivatives |
| Authors: | Guo, Fang-Yeong;Shih, Z. Y. |
| Contributors: | 物理學系 |
| Date: | 2003-03
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| Issue Date: | 2013-06-05T07:49:09Z
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| Publisher: | Elsevier |
| Abstract: | We study the low-lying two-photon excited states in nonlinear optical processes in poly(p-phenylene vinylene) (PPV) and its derivatives. We find that, within the Pariser–Parr–Pople (PPP) model, the mAg state in (unsubstituted) PPV is exactly the lowest two-photon excited state (i.e., the state). Due to the breaking of charge-conjugation symmetry, the 2Ag in substituted PPVs, originating from the , is weakly two-photon allowed, while the mAg has its origin from the , hence giving a strong peak in the two-photon absorption spectra. |
| Relation: | Chemical Physics Letters, 370(3-4): 572-577 |
| Appears in Collections: | [物理學系] 期刊論文
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