文献类型：期刊文献

英文题名：Exploring the Depth-Dependent Microviscosity inside a Micelle Using Butterfly-Motion-Based Fluorescent Probes

作者：Chen, Xuanying[1,2];Yuan, Shideng[3];Qiao, Mengyuan[1,2];Jin, Xin[1,2];Chen, Jiacheng[1,2];Guo, Lifang[1,2];Su, Jianhua[1,2];Qu, Da-Hui[1,2];Zhang, Zhiyun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China;[3]Shandong Univ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China

年份：2023

卷号：145

期号：48

起止页码：26494

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20235015214347);WOS:【SCI-EXPANDED(收录号:WOS:001125142900001)】；

基金：This work was supported by NSFC/China (22335004 and 22175063), Shanghai Municipal Sci. & Tech. Major Project (2018SHZDZX03), the 111 Project (B16017), Shanghai Committee of Sci. & Tech. (17520750100), and the Program for Eastern Scholar Distinguished Professor.

语种：英文

外文关键词：Viscosity

摘要：The viscosity distribution of micellar interiors from the very center to the outer surface is dramatically varied, which has been distinguished in theoretical models, yet it remains highly challenging to quantify this issue experimentally. Herein, a series of fluorophore-substituted surfactants DPAC-Fn (n = 3, 5, 7, 9, 11, 13, and 15) are developed by functionalizing the different alkyl-trimethylammonium bromides with the butterfly motion-based viscosity sensor, N,N '-diphenyl-dihydrodibenzo[a,c]phenazine (DPAC). The immersion depth of DPAC units of DPAC-Fn in cetrimonium bromide (C(16)TAB) micelles depends on the alkyl chain lengths n. From deep (n = 15) to shallow (n = 3), DPAC-Fn in C(16)TAB micelles exhibits efficient viscosity-sensitive dynamic multicolor emissions. With external standards for quantification, the viscosity distribution inside a C(16)TAB micelle with the size of similar to 4 nm is changed seriously from high viscosity (similar to 190 Pa s) in the core center to low viscosity (similar to 1 Pa s) near the outer surface. This work provides a tailored approach for powerful micelle tools to explore the depth-dependent microviscosity of micellar interiors.