Novel tetraphenylethylene (TPE)-functionalized nitroxide/alkoxyamine for nitroxide-mediated homogeneous and heterogeneous polymerizations. Issue 4 (22nd December 2020)

• Record Type: Journal Article
• Authors: Ma, Huanhuan; Wang, Linan; Liang, Yachao; Cui, Zhe; Fu, Peng; Liu, Minying; Qiao, Xiaoguang; Pang, Xinchang
• Is Part Of: Polymer chemistry. Volume 12:Issue 4(2021)
• Page Start: 526
• Page End: 533
• Publication Date: 2020-12-22
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/d0py01369b
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Tetraphenylethylene (TPE)-functionalized nitroxide/alkoxyamine realized the " in situ observation" of the NMP process for both homogeneous and heterogeneous polymerization systems. Abstract : Tetraphenylethylene (TPE)-containing 4-amino-2, 2, 6, 6-tetramethylpiperidine-1-oxyl (NH2 -TEMPO) and 3-(((2-cyanopropan-2-yl)oxy)(cyclohexyl)amino)-2, 2-dimethyl-3-phenylpropanenitrile (Dispolreg 007) were synthesized and utilized to mediate/initiate NMP in both homogeneous and heterogeneous polymerization systems. The introduction of TPE groups decreased the C–O bond dissociation energy (BDE) of NH2 -TEMPO-St and led to more efficient NMP with a higher reaction rate, even at lower temperatures. Moreover, for both solution polymerization and miniemulsion polymerization, quantitative information of the polymerization process could be easily acquired with the naked eye without destroying the reaction system, by building the relationship between the increased photoluminescence (PL) intensity of the system and monomer conversion as well as the molecular weight ( M n ).