Abstract
A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Brønsted and Lewis acidic sites (abbreviated as B-L MILs) were synthesized and characterized using nuclear magnetic resonance and mass spectrometry. Physical properties, such as thermal properties, magnetic susceptibility, and Brønsted and Lewis acidity, were measured. These properties were found to depend on the cation structure. These B-L MILs had good solubility in many organic solvents, good thermal stability, and low melting points, and exhibited magnet-like behavior. For these B-L MILs, the Brønsted acidity was measured using ultraviolet-visible (UV-Vis), and the Lewis acidity was measured using Fourier transform infrared spectroscopy (FTIR). The results showed that B-L MILs with an electron-withdrawing group in the aryl-imidazolium moiety had higher Brønsted acidity, whereas those with an electron-donating group had higher Lewis acidity. This type of ionic liquid, with both Brønsted and Lewis acidic sites, is expected to be a useful solvent and catalyst for organic reactions.
| Original language | English |
|---|---|
| Article number | 2539 |
| Journal | Materials |
| Volume | 11 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2018 Dec 13 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Materials Science(all)
Cite this
}
Synthesis and properties of magnetic aryl-imidazolium ionic liquids with dual Brønsted/Lewis acidity. / Chang, Jui Cheng; Yang, Che Hsuan; Sun, I-Wen; Ho, Wen Yueh; Wu, Tzi Yi.
In: Materials, Vol. 11, No. 12, 2539, 13.12.2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis and properties of magnetic aryl-imidazolium ionic liquids with dual Brønsted/Lewis acidity
AU - Chang, Jui Cheng
AU - Yang, Che Hsuan
AU - Sun, I-Wen
AU - Ho, Wen Yueh
AU - Wu, Tzi Yi
PY - 2018/12/13
Y1 - 2018/12/13
N2 - A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Brønsted and Lewis acidic sites (abbreviated as B-L MILs) were synthesized and characterized using nuclear magnetic resonance and mass spectrometry. Physical properties, such as thermal properties, magnetic susceptibility, and Brønsted and Lewis acidity, were measured. These properties were found to depend on the cation structure. These B-L MILs had good solubility in many organic solvents, good thermal stability, and low melting points, and exhibited magnet-like behavior. For these B-L MILs, the Brønsted acidity was measured using ultraviolet-visible (UV-Vis), and the Lewis acidity was measured using Fourier transform infrared spectroscopy (FTIR). The results showed that B-L MILs with an electron-withdrawing group in the aryl-imidazolium moiety had higher Brønsted acidity, whereas those with an electron-donating group had higher Lewis acidity. This type of ionic liquid, with both Brønsted and Lewis acidic sites, is expected to be a useful solvent and catalyst for organic reactions.
AB - A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Brønsted and Lewis acidic sites (abbreviated as B-L MILs) were synthesized and characterized using nuclear magnetic resonance and mass spectrometry. Physical properties, such as thermal properties, magnetic susceptibility, and Brønsted and Lewis acidity, were measured. These properties were found to depend on the cation structure. These B-L MILs had good solubility in many organic solvents, good thermal stability, and low melting points, and exhibited magnet-like behavior. For these B-L MILs, the Brønsted acidity was measured using ultraviolet-visible (UV-Vis), and the Lewis acidity was measured using Fourier transform infrared spectroscopy (FTIR). The results showed that B-L MILs with an electron-withdrawing group in the aryl-imidazolium moiety had higher Brønsted acidity, whereas those with an electron-donating group had higher Lewis acidity. This type of ionic liquid, with both Brønsted and Lewis acidic sites, is expected to be a useful solvent and catalyst for organic reactions.
UR - http://www.scopus.com/inward/record.url?scp=85058565717&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058565717&partnerID=8YFLogxK
U2 - 10.3390/ma11122539
DO - 10.3390/ma11122539
M3 - Article
VL - 11
JO - Materials
JF - Materials
SN - 1996-1944
IS - 12
M1 - 2539
ER -