A Low-Bandgap Conjugated Copolymer Based on Porphyrin and Dithienocoronene Diimide with Strong Two-Photon Absorption

作者：Weiyi Zhou, Feng Jin, Xuebin Huang, Xuan‐Ming Duan, Xiaowei Zhan · 发表于：Macromolecules · 年份：2012 · DOI：10.1021/ma3015257 · 被引用次数：36 · 研究领域：Nonlinear Optical Materials Studies、Porphyrin and Phthalocyanine Chemistry、Photochromic and Fluorescence Chemistry

A new low-bandgap donor–acceptor (D–A) conjugated copolymer poly(DTCDI–POR) of planar acceptor dithienocoronene diimide (DTCDI) and strong donor porphyrin (POR) has been synthesized by Sonogashira coupling polymerization. Poly(DTCDI–POR) exhibits good thermal stability (decomposition temperature of 323 °C), strong absorption (molar extinction coefficient per repeat unit is 1.05 × 10 5 L mol –1 cm –1 at 468 nm in CHCl 3 solution) in visible and near-infrared region (300–900 nm), low bandgap (1.44 eV), and strong two-photon absorption (2PA) at telecommunication wavelengths with 2PA cross sections per repeat unit as high as 7809 GM at 1520 nm.