文献类型：期刊文献

英文题名：Resolving Optical and Catalytic Activities in Thermoresponsive Nanoparticles by Permanent Ligation with Temperature-Sensitive Polymers

作者：Chen, Yihuang[1];Wang, Zewei[1];Harn, Yeu Wei[1];Pan, Shuang[1,3];Li, Zili[1];Lin, Shaoliang[2];Peng, Juan[3];Zhang, Guangzhao[4];Lin, Zhiqun[1,3]

机构：[1]Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China;[4]South China Univ Technol, Fac Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China

年份：2019

卷号：58

期号：34

起止页码：11910

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20192907194199);WOS:【SCI-EXPANDED(收录号:WOS:000474908000001)】；

基金：This work is supported by the Air Force Office of Scientific Research (FA9550-16-1-0187, FA9550-19-1-0317) and the National Science Foundation (CMMI 1727313, Chemistry 1903957).

语种：英文

外文关键词：block copolymers; catalytic activity; nanoparticles; nanoreactors; optical properties

摘要：Thermoresponsive nanoparticles (NPs) represent an important hybrid material comprising functional NPs with temperature-sensitive polymer ligands. Strikingly, significant discrepancies in optical and catalytic properties of thermoresponsive noble-metal NPs have been reported, and have yet to be unraveled. Reported herein is the crafting of Au NPs, intimately and permanently ligated by thermoresponsive poly(N-isopropylacrylamide) (PNIPAM), in situ using a starlike block copolymer nanoreactor as model system to resolve the paradox noted above. As temperature rises, plasmonic absorption of PNIPAM-capped Au NPs red-shifts with increased intensity in the absence of free linear PNIPAM, whereas a greater red-shift with decreased intensity occurs in the presence of deliberately introduced linear PNIPAM. Remarkably, the absence or addition of free linear PNIPAM also accounts for non-monotonic or switchable on/off catalytic performance, respectively, of PNIPAM-capped Au NPs.