Acid–Base Property ofN-Methylimidazolium-Based Protic Ionic Liquids Depending on Anion

2012 ◽  
Vol 116 (48) ◽  
pp. 14146-14152 ◽  
Author(s):  
Ryo Kanzaki ◽  
Hiroyuki Doi ◽  
Xuedan Song ◽  
Shota Hara ◽  
Shin-ichi Ishiguro ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Protic Ionic Liquids ◽  
Acid Base ◽  
Base Property ◽  
Acid Base Property

Structure, solvation, and acid–base property in ionic liquids

2010 ◽  
Vol 82 (10) ◽  
pp. 1927-1941 ◽  
Author(s):  
Shin-ichi Ishiguro ◽  
Yasuhiro Umebayashi ◽  
Ryo Kanzaki ◽  
Kenta Fujii
Keyword(s):  
Ionic Liquids ◽  
Metal Ion ◽  
Lithium Ion ◽  
Liquid Structure ◽  
Solution Chemistry ◽  
Acid Dissociation ◽  
Acid Base ◽  
Base Property ◽  
Ethylammonium Nitrate ◽  
Acid Base Property

Ionic liquids (ILs) are expected to have specific properties as solvents for chemical reactions in view of solution chemistry. Among physicochemical properties, liquid structure, acid–base, and electron-pair donating and accepting abilities of solvent play a crucial role in ion-solvation and acid–base, metal-ion complexation, and electrochemical reactions. Various types of ILs have been developed, and among others, the bis(trifluoromethanesulfonyl)amide (TFSA–)-based ILs are extensively used. TFSA– is a flexible molecule to give two stable conformers, cis (C1) and trans (C2), which are present in equilibrium in the liquid state. The conformational equilibrium shifts upon solvation to the metal ion. This is quantitatively studied to obtain thermodynamic parameters of conformational change from C2 to C1 in the bulk and in the solvation sphere of the lithium ion. On the other hand, with ethylammonium nitrate (EAN), a typical protic IL, it is revealed that the ammonium group is hydrogen-bonded with three nitrate ions to form a heterogeneous liquid structure. The solvent acid–base property of EAN and acid dissociation reaction in EAN have been quantitatively revealed, and the results will be discussed in comparison with those in normal molecular solvents.

Ethanol conversion over Ga2O3-ZrO2 solid solution: empirical evidences of the reaction pathway, the surface acid–base property, and role of isolated gallium ion

2021 ◽  
Author(s):  
Takashi Yamamoto ◽  
Akihito Kurimoto ◽  
Riona Sato ◽  
Shoki Katada ◽  
Hirotaka Mine ◽  
...  
Keyword(s):  
Solid Solution ◽  
Reaction Pathway ◽  
Ethanol Conversion ◽  
Acid Base ◽  
Base Property ◽  
Temperature Range ◽  
Acid Base Property

Ethanol conversion by Ga2O3-ZrO2 solid solution was examined in the temperature range 573–773 K, and acetone/isobutene formation was confirmed under cofeeding of H2O vapor. The reaction pathway was empirically investigated...

Using ozonation to eliminate the inhibition of soluble algal products (SAP) of Scenedesmus sp. LX1 on its growth in microalgal cultivation for biomass/bioenergy production

2015 ◽  
Vol 15 (5) ◽  
pp. 1034-1039 ◽  
Author(s):  
Lin-Lan Zhuang ◽  
Yin-Hu Wu ◽  
Xiao-Jie Shi ◽  
Tian-Yuan Zhang ◽  
Hong-Ying Hu
Keyword(s):  
Growth Rate ◽  
Recycled Water ◽  
Acid Base ◽  
Oxidation Treatment ◽  
Base Property ◽  
Microalgal Cultivation ◽  
Bioenergy Production ◽  
Algal Products ◽  
Microalgae Growth ◽  
Acid Base Property

Water recycling is an effective way to reduce water consumption in the industrialization of microalgae-based biomass/bioenergy production. The soluble algal products (SAP) which inhibit the microalgae growth will accumulate in the recycled water. Therefore, the ozone oxidation treatment of SAP produced by Scenedesmus sp. LX1 was studied to reduce the inhibition of SAP. The experimental results showed that there was almost no change in the content of SAP (counted by dissolved organic carbon) after ozonation, but the inhibition of SAP on microalgae growth disappeared. The intrinsic growth rate (r) of Scenedesmus sp. LX1 in the cultivation solution containing untreated SAP was 0.52 d−1, and it rose to 0.95 d−1 after SAP was ozonized. The maximum population growth rate (Rmax) followed a similar trend, increasing from 9.19 × 105 to 13.0 × 105 cells mL−1 d−1. It was suggested that the changes of fluorescence and hydrophilic–hydrophobic/acid–base property of SAP after ozonation leads to the disappearance of SAP inhibition on microalgae growth.

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