Two-Photon Fluorescence Properties and Ultrafast Responses of a Hyperbranched Diketo-Pyrrolo-Pyrrole Polymer with Triphenylamine as the Core
WANG Yao-Chuan1,2**, JIANG Yi-Hua3, WANG Gui-Qiu1, LIU Da-Jun1**, LI Bo4**, HUA Jian-Li3
1Department of Physics, Dalian Maritime University, Dalian 110626 2State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024 3Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai 200237 4Department of Electronic Engineering, East China Normal University, Shanghai 200241
Abstract：The two-photon fluorescence properties and ultrafast responses of a hyperbranched polyyne (hb-DPP-J2) with triphenylamine as the central core, Diketo-Pyrrolo-Pyrrole as the connecting unit and electron acceptor are studied. The polymer has a D-π-A-π-D conjugated structure along the extended polyyne π-bridge systems, and the effective conjugated unit repeats itself in the whole hyperbranched polymer chain. The polymer exhibits a large two-photon absorption cross section and high fluorescence quantum yields. The ultrafast dynamic results give a deep understanding of the excited energy transfer processes under excitation, and reveal a long relaxation lifetime of the intramolecular charge transfer (ICT) state.
(Ultrafast processes; optical pulse generation and pulse compression)
引用本文:
. [J]. 中国物理快报, 2015, 32(4): 48201-048201.
WANG Yao-Chuan, JIANG Yi-Hua, WANG Gui-Qiu, LIU Da-Jun, LI Bo, HUA Jian-Li. Two-Photon Fluorescence Properties and Ultrafast Responses of a Hyperbranched Diketo-Pyrrolo-Pyrrole Polymer with Triphenylamine as the Core. Chin. Phys. Lett., 2015, 32(4): 48201-048201.
2015, Vol. 32 
