文献类型：期刊文献

英文题名：Uniform π-Conjugated-Co-Oligomer-Based Nanofibers of Controlled Length with Near-Infrared Emission, Photodynamic and Photothermal Activities

作者：Ma, Junyu[1];Hao, Bingjie[1];Zhang, Sen[1];Huang, Xiaoyu[1];Lu, Guolin[1];Feng, Chun[1,2]

机构：[1]Chinese Acad Sci, Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Key Lab Synthet & Self Assembly Chem Organ Funct, 345 Lingling Rd, Shanghai 200032, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：9

期号：33

外文期刊名：ADVANCED MATERIALS INTERFACES

收录：;EI(收录号：20224312997513);WOS:【SCI-EXPANDED(收录号:WOS:000870554100001)】；

基金：The authors are thankful for financial support from National Science Foundation for Distinguished Young Scholars (51825304), National Natural Science Foundation of China (52122314, 52103094, 51873229 and 51961145103), Youth Innovation Promotion Association of CAS (Y2020062), Shanghai Scientific and Technological Innovation Project (20JC1415400, 21520780100, 22JC1401000 and 22ZR1475400), Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-05-E00012) and East China University of Science and Technology (SLD13223004). The authors thank Dr. Kun Cui for his assistance in TEM measurements and the beamline BL16B1 at SSRF for providing the beam time.

语种：英文

外文关键词：pi-conjugated polymers; crystallization-driven self-assembly; nanofibers; near-infrared emission; photodynamic effect

摘要：pi-Conjugated-polymer-based nanofibers (CPNFs) have attracted considerable interest in the community of nanomedicine owing to their high-aspect-ratio architecture and inherent photo-imaging, photothermal, photodynamic, and photoacoustic properties. However, the preparation of uniform CPNFs of controlled length and composition with near-infrared emission (NIR), photothermal and photodynamic activity remains in its infancy. A novel block copolymer consisting of a donor-acceptor-donor (D-A-D) pi-conjugated co-oligomer with a diketopyrrolopyrrole (DPP) unit as electron-deficient acceptor flanked by oligo(p- phenylene ethynylene) (OPE) as an electron-rich donor and a poly(2-vinylpyridine) (P2VP) block (OPE4-DPP-OPE4-b-P2VP(44), the subscripts describe the extra and average number of repeat units for pi-conjugated OPE segment and P2VP block, respectively) is designed and synthesized. By using the self-seeding approach of living crystallization-drive self-assembly (CDSA), uniform CPNFs containing a D-A-D OPE4-DPP-OPE4 core and a P2VP corona with tunable length from 31 to 611 nm are generated. The resulting CPNFs exhibit NIR emission with a peak at 837 nm. The CPNFs also can serve as a photosensitizer to efficiently produce single oxygen and show a photothermal effect upon 660 nm irradiation. To the author's best knowledge, it is the first report on the generation of uniform CPNFs of controlled length with NIR emission, and photodynamic and photothermal activities by living CDSA.