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Tuning the [pi]-[pi] stacking distance and J-aggregation of DPP-based conjugated polymer via introducing insulating polymer

Journal of polymer science. Part B, Polymer physics, 2016-04, Vol.54 (8), p.838 [Peer Reviewed Journal]

2016 Wiley Periodicals, Inc. ;ISSN: 0887-6266 ;EISSN: 1099-0488 ;DOI: 10.1002/polb.23984 ;CODEN: JPBPEM

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  • Title:
    Tuning the [pi]-[pi] stacking distance and J-aggregation of DPP-based conjugated polymer via introducing insulating polymer
  • Author: Chen, Liang ; Wang, Haiyang ; Liu, Jiangang ; Xing, Rubo ; Yu, Xinhong ; Han, Yanchun
  • Subjects: Morphology
  • Is Part Of: Journal of polymer science. Part B, Polymer physics, 2016-04, Vol.54 (8), p.838
  • Description: The close π-π stacking and the high J-aggregation during the formation of fibrillar morphology in films of the poly[[2,5-bis(2-octyldodecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl]-alt-[[2,2'-(2,5-thiophene)bis-thieno[3,2-b]thiophen]-5,5'-diyl]] (PDPPTT-T) are demonstrated via blending with polystyrene (PS). The hydrodynamic radius (Rh) of PDPPTT-T is decreased from 16.7 nm in the neat solution to 12.7 nm in the blend solution at the ratio of 1/20(PDPPTT-T/PS). This phenomenon suggests that blending PS is beneficial for the disentanglement of PDPPTT-T. The disentanglement of PDPPTT-T facilitates the formation of fibrillar morphology. The growth of the fibrils occurs along the molecular backbones and the width of the fibrils is parallel to the π-π stacking direction. The disentanglement of PDPPTT-T helps the molecules adjust conformation to improve J-aggregation and decrease the π-π stacking distance. The maximum absorption is red-shifted from 825 nm to 849 nm and the relative intensity of J-aggregation (the 0-0/0-1 ratio) is increased from 1.19 to 1.60. The π-π stacking distance decreases from 3.57 to 3.52 Å. The charge-carrier mobility will be improved in the fibrillar morphology with close π-π stacking and high J-aggregation. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 838-847
  • Publisher: Hoboken: Wiley Subscription Services, Inc
  • Language: English
  • Identifier: ISSN: 0887-6266
    EISSN: 1099-0488
    DOI: 10.1002/polb.23984
    CODEN: JPBPEM
  • Source: Alma/SFX Local Collection
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