文献类型：期刊文献

英文题名：Near infrared light regulated crystallization-driven self-assembly: a versatile platform for controlled preparation of uniform π-conjugated functional nanostructures

作者：Chen, Rang[1];Zhang, Sen[1];Huang, Xiaoyu[1];Lu, Guolin[1];Winnik, Mitchell A.[3,4];Feng, Chun[1,2]

机构：[1]Univ Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Fluorine & Nitrogen Chem & Adv Mat, 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;[3]Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada;[4]Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E2, Canada

年份：2026

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20261320346817);WOS:【SCI-EXPANDED(收录号:WOS:001722428300001)】；

基金：The authors are thankful for financial support from the National Key Research & Development Program of China (2024YFA1210700), National Natural Science Foundation of China (52533001, U22A20131 and 52361165657) and Strategic Priority Research Program of Chinese Academy of Sciences (XDB0590000). MAW thanks NSERC Canada for financial support. The authors thank Dr Kun Cui for his assistance in TEM measurements.

语种：英文

外文关键词：Block copolymers - Crystallinity - Micelles - Morphology - Nanostructures - Photochemical reactions - Self assembly

摘要：Photo-controlled block copolymer self-assembly to modulate the morphology and dimensions of polymer nanoparticles (PNPs) has attracted growing interest. However, most photo-induced polymer self-assembly approaches are dependent on ultraviolet- or visible-light-based photochemical reactions that lead to structural variations of the PNPs. The limited morphology control of these approaches hinders their broad applications. Here we report a novel near-infrared (NIR) light regulated self-seeding strategy for the controlled preparation of uniform pi-conjugated nanofibers of a 4-BBT-OPE3-P2VP22 block copolymer. This approach combines a NIR light induced photothermal effect with living crystallization-driven self-assembly (CDSA). By taking advantage of excellent photothermal activity and crystallinity of the 4-BBT-OPE3 segment, uniform helical fiber-like micelles could be generated with tunable lengths from similar to 40 nm to 1.1 & micro;m, photothermal activity and NIR-II emission. The lengths of these fiber-like micelles could be regulated by the time and power of NIR irradiation (808 nm laser). Moreover, the NIR light regulated self-seeding strategy could also be extended to core-crystalline block copolymers that lack a NIR-absorbing group if a NIR-absorbing dye like indocyanine green was added to the solution. Given the appealing merits and versatility of NIR light regulated self-seeding, this work paves a new way toward precise preparation of "smart" functional nanomaterials.