Solubility of Cellulose in Binary Mixtures of 1-Alkyl-3-methylimidazolium Acetate and Dimethyl Sulfoxide: Influence of Alkyl Chain Length in the Cation

2019 ◽  
Vol 72 (9) ◽  
pp. 669
Author(s):  
Yuta Tomimatsu ◽  
Yukihiro Yoshimura ◽  
Akio Shimizu
Keyword(s):  
Binary System ◽  
Chain Length ◽  
Mole Fraction ◽  
Binary Systems ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Anionic Species ◽  
Hydrogen Bond Basicity ◽  
A Chain ◽  
Chain Lengths

The influence of alkyl chain length of cations on cellulose solubility in a neat imidazolium (MIM)-based ionic liquid (IL) [CnMIM][OAc] and [CnMIM][OAc]–DMSO binary system (n=0–6) was investigated. The correlation between cellulose solubility and Kamlet–Taft hydrogen bond basicity (β) was also examined. Cellulose solubility (g per mol IL) in neat [CnMIM][OAc] increased as the cation alkyl chain length decreased from 6 to 2. However, alkyl chain lengths of 1 and 0 resulted in extremely poor cellulose solubility, indicating that a chain length of 2 was optimal for dissolution of cellulose in the system. Cellulose solubility in the [CnMIM][OAc]–DMSO binary system (n=1–6) was greater than that in neat IL, with maximum solubility occurring at an IL mole fraction of ~0.2. Maximum cellulose solubility in the [CnMIM][OAc]–DMSO binary system was slightly better at even alkyl chain lengths (n=2, 4, or 6) than at odd chain lengths (n=1, 3, or 5), with the best solubility at n=4. More interestingly, maximum cellulose solubility and specific IL mole fraction in the IL-DMSO binary system were related with the β values of neat ILs, even with ILs containing different anionic species or cation alkyl chain lengths. This indicates that solubility information in IL-DMSO binary systems is influenced by the characteristics of neat ILs.

Effects of alkyl chain length and anion on the optical and electrochemical properties of AIE-active α-cyanostilbene-containing triphenylamine derivatives

2020 ◽  
Vol 8 (22) ◽  
pp. 7454-7462
Author(s):  
Sin-Yu Chen ◽  
Min-Hao Pai ◽  
Guey-Sheng Liou
Keyword(s):  
Electrochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Redox Active ◽  
Chain Lengths

A series of AIE-active and redox-active α-cyanostilbene-containing triphenylamine derivatives with different alkyl chain lengths and anions were successfully synthesized, and their optical, photoluminescent and electrochromic behaviors were investigated.

The transfection efficiency of calix[4]arene-based lipids: the role of the alkyl chain length

2015 ◽  
Vol 3 (2) ◽  
pp. 317-322 ◽  
Author(s):  
Shinichi Mochizuki ◽  
Koichi Nishina ◽  
Shota Fujii ◽  
Kazuo Sakurai
Keyword(s):  
Chain Length ◽  
Plasmid Dna ◽  
Alkyl Chain ◽  
Transfection Efficiency ◽  
Alkyl Chain Length ◽  
Chain Lengths

Calix[4]arene-based lipids with the C6 alkyl chain length exhibited the highest transfection efficiency among all lipoplexes comprising the lipids with different alkyl chain lengths and plasmid DNA.

Correlating alkyl chain length with defect passivation efficacy in perovskite solar cells

2020 ◽  
Vol 56 (37) ◽  
pp. 5006-5009 ◽  
Author(s):  
Wenhuai Feng ◽  
Chengxi Zhang ◽  
Jun-Xing Zhong ◽  
Liming Ding ◽  
Wu-Qiang Wu
Keyword(s):  
Solar Cells ◽  
Chain Length ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Alkyl Chain Length ◽  
Defect Passivation ◽  
Amine Ligands ◽  
Chain Lengths

Anchoring of amine ligands with different alkyl chain lengths on perovskites mitigates non-radiative charge recombination in perovskite solar cells.

scholarly journals Studies of PET nonwovens modified by novel antimicrobials configured with both N-halamine and dual quaternary ammonium with different alkyl chain length

RSC Advances ◽  
2019 ◽  
Vol 9 (13) ◽  
pp. 7257-7265 ◽  
Author(s):  
Hsiu-Wen Chien ◽  
Ying-Yuan Chen ◽  
Yen-Lun Chen ◽  
Chi-Hui Cheng ◽  
Jui-Che Lin
Keyword(s):  
Chain Length ◽  
Quaternary Ammonium ◽  
Antimicrobial Agents ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chain Lengths

This work describes the synthesis of novel antimicrobial agents consisting of N-halamine and dual quaternary ammonium with different alkyl chain lengths and their antimicrobial applications for PET nonwovens.

Electronic and electrochemical properties as well as flowerlike supramolecular assemblies of fulleropyrrolidines bearing ester substituents with different alkyl chain lengths

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60342-60348 ◽  
Author(s):  
Xuan Zhang ◽  
Xu-Dong Li ◽  
Li-Xia Ma ◽  
Bei Zhang
Keyword(s):  
Electrochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Supramolecular Assemblies ◽  
Bilayer Structure ◽  
Lamellar Structures ◽  
Supramolecular Architectures ◽  
Chain Lengths

Flowerlike supramolecular architectures, obtained from a series of energetically PCBM-like and high C60 content (76–79%) fulleropyrrolidines FP1–FP4, were lamellar structures with alkyl chain length dependent thickness of a bilayer structure.

scholarly journals Controlled Growth of ZnSe Nanocrystals by Tuning Reactivity and Amount of Zinc Precursor

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Lai-Jun Zhang ◽  
Fa-Yun Chen ◽  
Ji-Zao Tong ◽  
Guang-Da Chen ◽  
Hai-Jin Huang ◽  
...  
Keyword(s):  
Optical Property ◽  
Chain Length ◽  
Alkyl Chain ◽  
Zinc Stearate ◽  
Alkyl Chain Length ◽  
Controlled Growth ◽  
Visible Absorption ◽  
Chain Lengths ◽  
Excellent Optical Property ◽  
Znse Nanocrystals

Zinc selenide (ZnSe) nanocrystals were synthesized via a phosphine-free route using the highly reactive alkylamine-H2Se complex as selenium precursor and zinc precursors with different reactivity. The reactivity of zinc precursor was tuned by using three kinds of zinc carboxylates with different alkyl chain lengths, including zinc acetate, zinc nonanoate, and zinc stearate. The effect of the reactivity and the amount of zinc precursor on nucleation and growth of ZnSe nanocrystals were investigated by ultraviolet-visible absorption and photoluminescence spectra. Result indicates that the growth and optical property of the resulting ZnSe nanocrystals are strongly dependent on the alkyl chain length and the amount of the zinc carboxylates and both shorter alkyl chain length, and more amount of zinc carboxylate will lead to faster growth of ZnSe nanocrystals. This allows that the controlled growth and excellent optical property of high-quality ZnSe nanocrystals can be achieved by combining the different reactivity and the used amount of zinc precursor, such as by using stoichiometric and reactive Zn precursor and Se precursor or by using larger amount of more unreactive Zn precursor relative to the highly reactive alkylamine-H2Se complex precursor.

Effect of alkyl chain length on piezochromic luminescence of iridium(iii)-based phosphors adopting 2-phenyl-1H-benzoimidazole type ligands

2014 ◽  
Vol 2 (36) ◽  
pp. 7648-7655 ◽  
Author(s):  
Yi Han ◽  
Hong-Tao Cao ◽  
Hai-Zhu Sun ◽  
Yong Wu ◽  
Guo-Gang Shan ◽  
...  
Keyword(s):  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chain Lengths

The effect ofN-alkyl chain lengths on the mechanochromism of Ir(iii)-based phosphors is studied. Reversible switching of the emission colour is achieved by using the Ir(iii) material as a medium.

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

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