Two-Photon Fluorescence Properties and Ultrafast Responses of a Hyperbranched Diketo-Pyrrolo-Pyrrole Polymer with Triphenylamine as the Core  

作　　者：王耀川 姜义华 王桂秋 刘大军 李波 花建丽 

机构地区：[1]Department of Physics, Dalian Maritime University, Dalian 110626 [2]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024 [3]Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai 200237 [4]Department of Electronic Engineering, East China Normal University, Shanghai 200241

出　　处：《Chinese Physics Letters》2015年第4期139-143,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11404048,61205154 and 11375034;the Fundamental Research Funds for the Central Universities under Grant Nos 3132015233,3132013104,3132014337,3132015144 and3132015152;the State Key Laboratory of Fine Chemicals(KF1409);the Program for Liaoning Excellent Talents in University under Grant No LJQ2014051

摘　　要：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 w-bridge systems, and the effective condugated unit repeats itself in the whole hyperbranehed 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.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 w-bridge systems, and the effective condugated unit repeats itself in the whole hyperbranehed 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.

关 键 词：DPP Two-Photon Fluorescence Properties and Ultrafast Responses of a Hyperbranched Diketo-Pyrrolo-Pyrrole Polymer with Triphenylamine as the Core THF ICT TPA 

分 类 号：O633.5[理学—高分子化学]