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Femtosecond third-order optical nonlinearity of conjugated polymers consisting of fluorene and tetraphenyldiaminobiphenyl units: Structure-property relationships
Zhan, XW; Liu, YQ; Zhu, DB; Huang, WT; Gong, QH
2002-02-28
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume106Issue:8Pages:1884-1888
AbstractFemtosecond time-resolved optical Kerr effect technique has been used to investigate the third-order nonlinear optical (NLO) properties of a series of conjugated polymers consisting of fluorene and/or tetraphenyldiaminobiphenyl (TPD) units designed to elucidate structure-property relationships for the microscopic second-order hyperpolarizability gamma in polymeric materials. The gamma per repeated unit of the series of polymers has off-resonant values at 830 nm in the range of 2.0 x 10-(33)-2.4 x 10(-31) esu, demonstrating a large modulation of nonlinear optical response by simple structural variations. The gamma values of alternative copolymers containing fluorene and TPD moieties are 2 orders of magnitude higher than the gamma value of the homopolymer polyfluorene, revealing the vital role of the strong electron donor TPD in the NLO enhancement. The fluorene segment was found to result in 4-fold enhancement of gamma in TPD-containing copolymers compared to p-phenylenevinylene segment, indicating that the planar rigid ring of fluorene is an efficient third-order NLO chromophore. No relationship between the magnitude of gamma and the optical band gap was found. The large variation of gamma value with molecular structure of these polymers can be explained by molecular exciton theory other than the band theory.
DOI10.1021/jp013472o
Indexed BySCI
Language英语
WOS IDWOS:000174189000009
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/78438
Collection中国科学院化学研究所
Corresponding AuthorLiu, YQ
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
2.Peking Univ, Mesoscop Phys Lab, Beijing 100871, Peoples R China
3.Peking Univ, Dept Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Zhan, XW,Liu, YQ,Zhu, DB,et al. Femtosecond third-order optical nonlinearity of conjugated polymers consisting of fluorene and tetraphenyldiaminobiphenyl units: Structure-property relationships[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2002,106(8):1884-1888.
APA Zhan, XW,Liu, YQ,Zhu, DB,Huang, WT,&Gong, QH.(2002).Femtosecond third-order optical nonlinearity of conjugated polymers consisting of fluorene and tetraphenyldiaminobiphenyl units: Structure-property relationships.JOURNAL OF PHYSICAL CHEMISTRY B,106(8),1884-1888.
MLA Zhan, XW,et al."Femtosecond third-order optical nonlinearity of conjugated polymers consisting of fluorene and tetraphenyldiaminobiphenyl units: Structure-property relationships".JOURNAL OF PHYSICAL CHEMISTRY B 106.8(2002):1884-1888.
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