Exceptionally Strong Multiphoton-Excited Blue Photoluminescence and Lasing from Ladder-Type Oligo(p-phenylene)s

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• 作者：Hai Hua Fan ; Lei Guo ; King Fai Li ; Man Shing Wong ; Kok Wai Cheah
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：May 2, 2012
• 年：2012
• 卷：134
• 期：17
• 页码：7297-7300
• 全文大小：321K
• 年卷期：v.134,no.17(May 2, 2012)
• ISSN：1520-5126

文摘

We report the synthesis and investigation of multiphoton absorption properties of a novel series of diphenylamino-end-capped ladder-type oligo(p-phenylene)s which exhibit greatly enhanced and efficient multiphoton (from two- to five-photon) upconverted blue photoluminescence with which the record-high intrinsic three-photon absorption cross-section of 4.56 脳 10^鈥?6 cm⁶ s² in the femtosecond regime has been obtained. Exceptionally efficient two- to five-photon-excited lasing in the blue region has also been demonstrated in which the highest two-photon-excited lasing efficiency of 0.34% has been achieved.