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 × 10 -76 cm 6 s 2 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.
|Number of pages||4|
|Journal||Journal of the American Chemical Society|
|Early online date||20 Apr 2012|
|Publication status||Published - 2 May 2012|
Scopus Subject Areas
- Colloid and Surface Chemistry