Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 17, Pages 7297-7300Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja302085q
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Funding
- GRF [HKBU 202408]
- Hong Kong Research Grant Council
- Faculty Research Grant [FRG2/10-11/015]
- Hong Kong Baptist University
- Institute of Molecular Functional Materials
- University Grants Committee [AoE/P-03/08]
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We report the synthesis and investigation of multiphoton absorption properties of a novel series of diphenylamino-end-capped ladder-type oligo(pphenylene)s which exhibit greatly enhanced and efficient multiphoton (from two- to five-photon) upccinverted blue photoluminescence with which the record high intrinsic three-photon absorption cross-section of 4.56 x 10(-76) cm(6) 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.
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