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Two-photon absorption properties of hyperbranched conjugated polymers with triphenylamine as the core
- Source :
-
Polymer . Sep2004, Vol. 45 Issue 21, p7143-7149. 7p. - Publication Year :
- 2004
-
Abstract
- Two new hyperbranched phenylene vinylenes (HPVs) with triphenylamine as the core, 2,5-dihexyloxyl substituted phenylene vinylene as the connecting unit, and electron-donating triphenylamine or electron-deficient nitrobenzene as the different terminal groups were synthesized by modified Wittig polymerization reaction. Their one- and two-photon absorption (TPA) properties have been investigated. The two-photon absorption cross sections of the two polymers were performed by open-aperture Z-scan experiment using 120 femtosecond (fs) pulse, and their TPA cross section were determined to be 1.43 and 0.64×10-20cm4/GW per repeating unit at 800nm, respectively. In chloroform, HPVs exhibit intense frequency up-converted fluorescence under the excitation of 120fs pulses at 800nm with the peaks located at 544 and 554nm, respectively. [Copyright &y& Elsevier]
- Subjects :
- *POLYMERS
*MACROMOLECULES
*CHEMICAL processes
*FLUORESCENCE
*MOLECULAR biology
Subjects
Details
- Language :
- English
- ISSN :
- 00323861
- Volume :
- 45
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Polymer
- Publication Type :
- Academic Journal
- Accession number :
- 14427517
- Full Text :
- https://doi.org/10.1016/j.polymer.2004.08.053