Ultrafast and green ionic liquid-mediated controlled cationic polymerization towards amphiphilic diblock copolymers

2021 ◽  
Author(s):  
Devendra Kumar ◽  
Sk Arif Mohammad ◽  
Md Mehboob Alam ◽  
Sanjib Banerjee
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ambient Temperature ◽  
Cationic Polymerization ◽  
Diblock Copolymers ◽  
Polymerization Reaction ◽  
Amphiphilic Diblock Copolymers

Ionic liquids (ILs) have gained lot of interest in recent years for use as solvents in organic transformation/polymerization reaction. However, gaining control over ambient temperature polymerization would expand the utility...

Precise synthesis of UCST-type amphiphilic diblock copolymers with pendant imidazolium ionic liquid segments and their thermosensitive physical gelation at extremely low concentrations in water

2018 ◽  
Vol 9 (41) ◽  
pp. 5080-5085 ◽  
Author(s):  
Daichi Yokota ◽  
Arihiro Kanazawa ◽  
Sadahito Aoshima
Keyword(s):  
Ionic Liquid ◽  
Cationic Polymerization ◽  
Diblock Copolymers ◽  
Imidazolium Ionic Liquid ◽  
Living Cationic Polymerization ◽  
Polymer Reaction ◽  
Low Concentrations ◽  
Gelation Behavior ◽  
Physical Gelation ◽  
Amphiphilic Diblock Copolymers

UCST-type amphiphilic diblock copolymers were synthesized via living cationic polymerization and subsequent polymer reaction and they exhibited thermosensitive physical gelation behavior at an extremely low concentration in water.

scholarly journals Precise synthesis of amphiphilic diblock copolymers consisting of various ionic liquid-type segments and their influence on physical gelation behavior in water

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 42378-42387
Author(s):  
Daichi Yokota ◽  
Arihiro Kanazawa ◽  
Sadahito Aoshima
Keyword(s):  
Ionic Liquid ◽  
Cationic Polymerization ◽  
Diblock Copolymers ◽  
Vinyl Ethers ◽  
Imidazolium Salt ◽  
Living Cationic Polymerization ◽  
Gelation Behavior ◽  
Physical Gelation ◽  
Liquid Type ◽  
Amphiphilic Diblock Copolymers

Amphiphilic diblock copolymers of hydrophobic and imidazolium salt-containing vinyl ethers were synthesized via living cationic polymerization. The influence of hydrophobic and the ionic-liquid moieties on physical gelation in water was examined.

Synthesis of highly reactive polyisobutylenesviacationic polymerization in ionic liquids: characteristics and mechanism

2019 ◽  
Vol 10 (2) ◽  
pp. 201-208 ◽  
Author(s):  
Xiaoning Li ◽  
Yibo Wu ◽  
Jinghan Zhang ◽  
Shuxin Li ◽  
Min Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Cationic Polymerization

The cationic polymerization of isobutylene (IB) was systematically studied in a 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) ionic liquid at −10 °C.

Characteristics and mechanism of styrene cationic polymerization in 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105322-105330 ◽  
Author(s):  
Lu Han ◽  
Yi-bo Wu ◽  
Yang Dan ◽  
Hao Wang ◽  
Xiao-qian Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Cationic Polymerization ◽  
Wide Range

There has recently been a wide range of trends in the use of ionic liquids (ILs) as reaction solvent for various polymerization processes.

scholarly journals Electro-synthesis of ammonia from nitrogen at ambient temperature and pressure in ionic liquids

2017 ◽  
Vol 10 (12) ◽  
pp. 2516-2520 ◽  
Author(s):  
Fengling Zhou ◽  
Luis Miguel Azofra ◽  
Muataz Ali ◽  
Mega Kar ◽  
Alexandr N. Simonov ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ambient Temperature ◽  
Ambient Conditions ◽  
Liquid Media ◽  
Faradaic Efficiency ◽  
Temperature And Pressure

High faradaic efficiency reduction of N2 to NH3 is achieved in ionic liquid media under ambient conditions.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

Ionic Liquid Assisted Synthesis of Some 2-Aminobenzenethiols

2019 ◽  
Vol 16 (7) ◽  
pp. 550-555
Author(s):  
Dinesh K. Jangid ◽  
Keshav L. Ameta ◽  
Surbhi Dhadda ◽  
Anjali Guleria ◽  
Prakash G. Goswami ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Comparative Study ◽  
Maximum Yield ◽  
Efficient Synthesis ◽  
Target Molecules ◽  
Presence And Absence

Ionic Liquid assisted efficient synthesis of some 2-aminobenzenethiols has been reported using three different Ionic Liquids (ILs) namely methylimidazolium tetrafluoroborate [MIM]+[BF4]−, methylimidazolium chloride [MIM]+[Cl]− and methylimidazolium nitrate [MIM]+[NO3]−. A comparative study has been carried out for the synthesis of target molecules in the presence and absence of IL, leading to conclusion that maximum yield has been observed with [MIM]+[BF4]−.

Dispersive Liquid-Liquid Microextraction Based on Ionic Liquid and Spectrophotometric Determination of Bilirubin in Biological Samples

2020 ◽  
Vol 16 (5) ◽  
pp. 652-659
Author(s):  
Asiye A. Avan ◽  
Hayati Filik
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Biological Samples ◽  
Urine Samples ◽  
Spectrophotometric Detection ◽  
Full Color ◽  
Dispersive Liquid Liquid Microextraction ◽  
Urine And Serum ◽  
Liquid Microextraction

Background: An Ionic Liquid-based based Dispersive Liquid-Liquid Microextraction (IL-DLLME) method was not applied to preconcentration and determination of bilirubin. Ionic Liquids (ILs) are new chemical compounds. In recent years, Ionic Liquids (ILs) have been employed as alternative solvents to toxic organic solvents. Due to these perfect properties, ILs have already been applied in many analytical extraction processes, presenting high extraction yield and selectivity for analytes. Methods: In this study, IL-DLLME was applied to biological samples (urine and serum) for the spectrophotometric detection of bilirubin. For bilirubin analysis, the full-color development was based on the reaction with periodate in the presence of hydrochloric acid. The high affinity of bilirubin for the ionic liquid phase gave extraction percentages above 98% in 0.3 M HCl solution. Results: Several IL-extraction parameters were optimized and room temperature ionic liquid 1-butyl- 1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and ethanol were used as extraction and disperser solution. The linear range was found in the range of 0.5-6.0 μM (0.3-3.5 μg mL-1) and the limits of detection of the proposed method was 0.5 μM (0.3 μg mL-1). The proposed method was applied for the preconcentration and separation of trace bilirubin in real urine samples. Also, the recoveries for bilirubin in spiked biological samples (urine and serum) were found to be acceptable, between 95-102%. Conclusion: The proposed IL-DLLMEapproach was employed for the enrichment and determination of trace levels of bilirubin in urine samples using NaIO4 as an oxidizing agent and Uv-vis spectrophotometric detection. The periodate oxidation of bilirubin is rapid, effective, selective, and simple to perform. The method contains only HCl, NaOI4, and an anionic surfactant. The method may be useful for economizing in the consumption of reagents in bilirubin determining. The IL-DLLMEmethod ensures a high yield and has a low toxicity no skin sensitization, no mutagenicity and no ecotoxicity in an aquatic environment since only very low quantities of an IL is required. For full-color formation, no any extra auxiliary reagents are required. Besides, the IL-DLLME technique uses a low-cost instrument such as Uv-vis which is present in most of the medical laboratories.

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