Synthesis and Characterization of Alkeyl Imidazolium Ionic Liquids

2014 ◽  
Vol 1048 ◽  
pp. 452-455
Author(s):  
Qiang Wang ◽  
Shi Dong Wang ◽  
Ming Chen Qi ◽  
Shu Liang Zang
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Structure And Properties ◽  
Spectra Analysis ◽  
Infrared Spectrometer ◽  
Liquid Salts ◽  
Structure Of Matter

Two new imidazole ionic liquid salts, 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) and 1-allyl-3-methy-imidazolium hydrogen sulfate ([EMIM]HSO4), were synthesized with direct synthesis and two-step synthesis method, using a viscosity meter, PH meter, conductivity meter, densitometer, infrared spectrometer determined its chemical structure and properties. The results show that two ionic liquids in the range is slightly different, the trend is roughly same. As the temperature increases, the viscosity decreases, PH gradually increased, the density decreases slightly, can be regarded as constant, the conductivity gradually increased. Ionic liquids of the two IR spectra analysis show its structure and synthetic route consistent with the structure of matter.

Characterization, structural transitions and properties of a tightly crosslinked polythiourethane network for optical applications

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Boris Jaffrennou ◽  
Nicolas Droger ◽  
Françoise Méchin ◽  
Jean-Louis Halary ◽  
Jean-Pierre Pascault
Keyword(s):  
Chemical Structure ◽  
Reactive System ◽  
Gel Point ◽  
Curing Process ◽  
Structure And Properties ◽  
Critical Temperatures ◽  
Plastic Properties ◽  
Optical Applications ◽  
Different Characteristics

AbstractA new polythiourethane thermosetting system based on a diisocyanate and a trithiol was studied. After characterization of the reactive species, two critical temperatures, namely Tg∞ (maximum glass transition temperature of the thermosetting system) and gelTg (Tg of the material at the gel point), were determined. The conversion at gel point was also determined and compared to the theoretical prediction. Two different characteristics of the evolution of a reactive system, Tg and conversion x as a function of time, were related. This is of particular interest for understanding the curing process, especially when non-isothermal cure schedules are used. Viscoelastic and plastic properties were investigated, with the aim of establishing connections between the chemical structure and properties through detailed analysis of the polymer chain motions (β and α relaxations). Measurements of the storage modulus at the rubbery plateau and of the critical strain intensity factor KIc complete the study.

Synthesis and Characterization of Supported on Silica Based Ionic Liquids

2015 ◽  
Vol 727-728 ◽  
pp. 34-37
Author(s):  
Li Ying Guo ◽  
Jun Shi ◽  
Jun Hai He ◽  
Ji Yue Huang ◽  
Peng Cheng Huang
Keyword(s):  
Crystal Structure ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Chemical Structure ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Ionic Liquids ◽  
Methyl Imidazole

Three kinds of functionalized imidazolium ionic liquid, 1-chloride (2-hydroxyethyl) -3-methyl imidazole ionic liquid [HeMIM]Cl, 1-bromide ethylamine-3-methyl imidazolium ionic liquid [AeMIM]Br and chlorinated 1-carboxyethyl-3-methyl imidazolium ionic liquid [CeMIM]Cl, were synthesized firstly. Subsequently, three kinds of supported silicon imidazolium ionic liquids were prepared from above ionic liquids with tetraethoxysilane by sol-gel method. The Chemical structure and crystal structure of the supported on silica based ionic liquids were analyzed by FTIR and XRD.

Preparation and characterization of vinyl-functionalized mesoporous SBA-15 silica by a direct synthesis method

2007 ◽  
Vol 61 (7) ◽  
pp. 1469-1473 ◽  
Author(s):  
Qi Wei ◽  
Hui-Qiao Chen ◽  
Zuo-Ren Nie ◽  
Ya-Li Hao ◽  
Yan-Li Wang ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Synthesis Method

GROWTH AND CHARACTERIZATION OF SILICON CARBIDE NANOWIRES

2004 ◽  
Vol 11 (04n05) ◽  
pp. 373-378 ◽  
Author(s):  
BYOUNGTAE PARK ◽  
YONGHWAN RYU ◽  
KIJUNG YONG
Keyword(s):  
Hydrofluoric Acid ◽  
Carbothermal Reduction ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Core Shell ◽  
The Core ◽  
Sic Nanowires ◽  
Solid Liquid ◽  
Shell Nanowires

A simple, direct synthesis method was used to grow the core-shell SiC - SiOx nanowires by heating the NiO catalyzed silicon substrate. The carbothermal reduction of WO3 by C provided a reductive environment to synthesize the crystalline SiC nanowires covered with the SiO x sheath in the growth temperature of 1000–1100°C. After hydrofluoric acid (HF) etching, the cubic β- SiC nanowires were extracted from the core-shell nanowires in large quantities. A solid-liquid-solid (SLS) mechanism was proposed for the growth of the core-shell SiC - SiO x nanowires.

Synthesis and Characterization of Novel Ester Functionalized Chiral Ionic Liquids

2011 ◽  
Vol 197-198 ◽  
pp. 471-477
Author(s):  
Hong Li Wang ◽  
Xiao Ling Hu ◽  
Ping Guan ◽  
Jin Yang Yu ◽  
Yi Mei Tang
Keyword(s):  
Ionic Liquids ◽  
Quantum Chemical ◽  
Chemical Structure ◽  
Structure Optimization ◽  
Building Blocks ◽  
Optimization Method ◽  
Metathesis Reaction ◽  
Chiral Ionic Liquids ◽  
Methyl Imidazole

Three different chiral ionic liquids, chloride (R)-(+)-β-(1-methyl-imidazole)–propio-nate, (R)-(+)-β-(1-methyl-imidazole)-propionate terafluoroborate and hexafluorophosphate, weresuccessfully synthesized via the nucleophilic substitution reaction and the anion metathesis reaction, with (S)-(-)-2-chloro-propionic acid as the chiral source. Structures of the chiral io-nic liquids have been characterized by the infrared spectroscopy, nuclear magnetic resonancespectroscopy and quantum chemical structure optimization method. These new ionic materia-ls can be used as building blocks for the synthesis of ionic liquids.

Synthesis and Characterization of Blue Light Emitting N,N-Dimethylpyren-1-Amine and its Vinyl Polymer

2012 ◽  
Vol 557-559 ◽  
pp. 722-726 ◽  
Author(s):  
Jian Li Wang ◽  
Louis M Leung
Keyword(s):  
Free Radical ◽  
Quantum Yield ◽  
Radical Polymerization ◽  
Small Molecule ◽  
Chemical Structure ◽  
Synthesis And Characterization ◽  
Structure And Properties ◽  
Light Emitting ◽  
Vinyl Polymer

A new small molecule N,N-dimethylpyren-1-amine (DMPA) was synthesized and its vinyl polymer poly(N,N-dimethylpyren-1-amine) was polymerized by free radical polymerization. The chemical structure and properties of DMPA and P(DMPA) were characterized by NMR, GPC, TGA, DSC, UV-Vis, PL, CV and quantum yield measurements.

Preparation and Characterization of 1-methyl-3-butyl Nitrate

2013 ◽  
Vol 303-306 ◽  
pp. 2675-2678
Author(s):  
Peng Tian ◽  
Yan Hong Kang ◽  
Zhi Gang Zhao ◽  
Tian Ling Qin ◽  
Bo Meng ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Forward Direction ◽  
Structure Characterization ◽  
Room Temperature Ionic Liquids ◽  
Synthesis Reaction ◽  
Continuous Precipitation ◽  
Infrared Spectrometer ◽  
Methyl Imidazole

1-methyl-3-butyl Imidazole chloride is prepared by 1–methyl imidazole and chlorinated n-butane. The synthesis reaction of 1-methyl-3-butyl imidazole tetrafluoroborate is in the acetone. The solubility of NaNO3and BMIC in acetone is not large, but due to the insolubility in acetone of reaction product NaCl and continuous precipitation from the liquid phase in the reaction process, so as to promote the reaction continuously towards forward direction. The colorless transparent and odorless BMINO3are gotten. We use infrared spectrometer for the structure characterization, it is proved that we have gotten BMINO3room temperature ionic liquids. BMIC and BMINO3ionic liquids have better solubility in H2O, ethanol, ethyl acetate, acetone, acetonitrile, and methanol, and is insoluble in the ether and cyclohexane.

Comparative Characterization of Different Samples Containing Nano-ZnO Particles with Applicability in Topical Therapies

2019 ◽  
Vol 56 (3) ◽  
pp. 652-656
Author(s):  
Raul Chioibas ◽  
Florin Borcan ◽  
Ovidiu Mederle ◽  
Dana Stoian ◽  
Codruta Marinela Soica
Keyword(s):  
Synthesis Method ◽  
Pharmaceutical Preparations ◽  
Ultrasound Treatment ◽  
Heating Process ◽  
White Pigment ◽  
Nano Zno ◽  
Zno Particles ◽  
Repeated Freezing ◽  
Skin Healing

Zinc oxide (ZnO) is an inorganic compound used for its antiseptic and skin healing properties. It is an excellent protective filter against UV radiation and it can be used as white pigment in pharmaceutical preparations. In this study, nano-ZnO particles were obtained by ultrasound treatment, and respectively by repeated freezing/heating process. The influence of synthesis method and of ultrasound generator parameters on the particles size and stability was observed. The results reveal that were obtained samples with a very good stability and sizes between 15 and 96 nm. It was found that synthesis based on ultrasound treatment lead to the formation of nanoparticles with lower sizes.

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