The effect of LiNTf2 on the propagation rate coefficient of methyl methacrylate
Literature Information
Benjamin B. Noble, Leesa M. Smith, Michelle L. Coote
In the present work we use accurate Pulsed Laser Polymerization (PLP) to measure the influence of various concentrations of lithium bis(trifluromethane)sulfonamide (LiNTf2) on the propagation rate coefficient of methyl methacrylate (MMA). We also perform 1H-NMR analysis to evaluate the effect of LiNTf2 on poly(MMA) stereochemistry. Additionally, we perform high-level quantum-chemical calculations to model the interactions between Li+ and the MMA monomer and propagating radical. Across a broad range of concentrations, LiNTf2 only slightly increases the isotacticity of the resultant poly(MMA). However, a significant increase in the propagation rate coefficient was noted upon addition of LiNTf2. The magnitude of this increase was found to be dependent on the LiNTf2 concentration and temperature. Theoretical calculations reveal the complexities associated with Lewis acid-mediated stereocontrol. On the basis of this theoretical work, we suggest that the potential stereocontrol afforded by Lewis acids is being hindered by their action as propagation catalysts though non-stereoselective binding modes.
Related Literature
Visualizing the down-regulation of hTERT mRNA expression using gold-nanoflare probes and verifying the correlation with cancer cell apoptosis
Hongxiao Sun, Min Hong, Qiangqiang Yang, Chuan Li, Guangzhi Zhang, Qiaoli Yue, Yanhua Ma, Xia Li
DOI: 10.1039/C9AN00204A
Towards identifying the mode of action of drugs using live-cell FTIR spectroscopy
Ali Altharawi, Khondaker Miraz Rahman, K. L. Andrew Chan
DOI: 10.1039/C8AN02218F
Recent advances in microRNA detection
Yongqiang Cheng, Lijuan Dong, Jiangyan Zhang, Yaqing Zhao
DOI: 10.1039/C7AN02001E
Frequency division multiplex HPLC-MS for simultaneous analyses
Hiroka Kishi, Takashi Kumazaki, Shinya Kitagawa, Hajime Ohtani
DOI: 10.1039/C8AN02352B
Metal–organic frameworks as affinity agents to enhance the microdialysis sampling efficiency of fatty acids
Yangyang Zhang, Zhenpeng Wang
DOI: 10.1039/C8AN00238J
Biosensing strategies based on enzymatic reactions and nanoparticles
Nerea Briz, Valeri Pavlov
DOI: 10.1039/C7AN02067H
Simple preparation and highly selective detection of silver ions using an electrochemical sensor based on sulfur-doped graphene and a 3,3′,5,5′-tetramethylbenzidine composite modified electrode
Yuan Yu
DOI: 10.1039/C7AN02084H
Metal ions induced secondary structure rearrangements: mechanically interlocked lasso vs. unthreaded branched-cyclic topoisomers
Kevin Jeanne Dit Fouque, Javier Moreno, Julian D. Hegemann, Séverine Zirah, Sylvie Rebuffat, Francisco Fernandez-Lima
DOI: 10.1039/C8AN00138C
A facile signal-on electrochemical DNA sensing platform for ultrasensitive detection of pathogenic bacteria based on Exo III-assisted autonomous multiple-cycle amplification
Qianqian Pei, Xiaolei Song, Su Liu, Jingfeng Wang, Xueqi Leng, Xuejun Cui, Jinghua Yu, Yu Wang
DOI: 10.1039/C9AN00036D
Biocompatible Ag2S quantum dots for highly sensitive detection of copper ions
Peng Jiang, Shulan Li, Minlu Han, Yi Liu, Zilin Chen
DOI: 10.1039/C9AN00096H
You might also like
What precautions should be taken when handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2)?
When handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2), it is importan...
Is 4-(4H-1,2,4-Triazol-4-yl)piperidine (CAS: 690261-92-8) safe?
4-(4H-1,2,4-Triazol-4-yl)piperidine is generally considered safe for use in phar...
How should waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) be handled?
Waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) should be collecte...
What regulatory guidelines apply to 5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3)?
5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3) is subject to regulat...
How is Methyl 3-acetamido-2-thiophenecarboxylate (CAS: 22288-79-5) typically synthesized?
Methyl 3-acetamido-2-thiophenecarboxylate can be synthesized by the reaction of ...
What is 4-Isoquinolinecarbonitrile (CAS: 34846-65-6)?
4-Isoquinolinecarbonitrile is a chemical compound with the CAS number 34846-65-6...
How should Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) be stored?
Store Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) in a cool, dry p...
What regulatory guidelines apply to 6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8)?
6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8) is subject to the...
Is (2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) safe?
(2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) ...
What are the physical and chemical properties of 7-bromo-3-methyl-3,4-dihydroquinazolin-4-one (CAS: 1293987-84-4)?
7-Bromo-3-methyl-3,4-dihydroquinazolin-4-one is a solid with a crystalline form....
Source Journal
Polymer Chemistry

Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.














