http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CO2 Solubilities in Amide-based Brønsted Acidic Ionic Liquids
Jelliarko Palgunadi,임진규,Je Eun Kang,김훈식,정민석 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.1
A distinguished class of hydrophobic ionic liquids bearing a Brønsted acidic character derived from amide-like compounds were prepared by a neutralization reaction of N,N-diethylformamide, N,N-dibutylformamide, 1-formylpiperidine, and ε-caprolactam with trifluoroacetic acid and physical absorptions of CO2 in these ionic liquids were demonstrated and evaluated. CO2 solubilities in these ionic liquids were influenced by the molecular structure of the cation and were apparently increased with the molar volume. Comparison based on a volume unit reveals that CO2 solubilities in these liquids are relatively higher than those in imidazolium-based ionic liquids. Henry’s coefficients calculated from low-pressure solubility tests at 313 to 333 K were used to derive the thermodynamics quantities. Enthalpy and entropy of solvation may share equal contributions in solubility
Palgunadi, Jelliarko,Kang, Je-Eun,Cheong, Min-Serk,Kim, Hong-Gon,Lee, Hyun-Joo,Kim, Hoon-Sik Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.8
Solubilities of carbon dioxide (C$O_2$) in a series of fluorine-free room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates and dialkylimidazolium alkylphosphites, were measured at 313∼333 K and pressures up to 5 MPa. Henry’s law coefficients as the solubility parameter of C$O_2$ in RTILs were derived from the isotherm of fugacity versus C$O_2$ mole fraction. The C$O_2$ solubility in a phosphorus-containing RTIL was found to increase with the increasing molar volume of the RTIL. In general, dialkylimidazolium dialkylphosphate exhibited higher absorption capacity than dialkylimidazolium alkylphosphite as long as the RTILs possess an identical cation. Among RTILs tested, 1-butyl-3-methylimidazolium dibutylphosphate [BMIM][B$u_2PO_4$] and 1-butyl-3-methylimidazolium butylphosphite [BMIM][BuHP$O_3$] exhibited similar Henry’s law coefficients to 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([BMIM][T$f_2$N]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][B$F_4$]), respectively. The Krichevsky-Kasarnovsky equation was employed to derive the C$O_2$ solubility parameter (Henry’s law coefficient) from the solubility data measured at elevated pressures.
CO<sub>2</sub> Solubilities in Amide-based Brønsted Acidic Ionic Liquids
Palgunadi, Jelliarko,Im, Jin-Kyu,Kang, Je-Eun,Kim, Hoon-Sik,Cheong, Min-Serk Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.1
A distinguished class of hydrophobic ionic liquids bearing a Br${\o}$nsted acidic character derived from amide-like compounds were prepared by a neutralization reaction of N,N-diethylformamide, N,N-dibutylformamide, 1-formylpiperidine, and $\varepsilon$-caprolactam with trifluoroacetic acid and physical absorptions of $CO_2$ in these ionic liquids were demonstrated and evaluated. $CO_2$ solubilities in these ionic liquids were influenced by the molecular structure of the cation and were apparently increased with the molar volume. Comparison based on a volume unit reveals that $CO_2$ solubilities in these liquids are relatively higher than those in imidazolium-based ionic liquids. Henry's coefficients calculated from low-pressure solubility tests at 313 to 333 K were used to derive the thermodynamics quantities. Enthalpy and entropy of solvation may share equal contributions in solubility.
Palgunadi, Jelliarko,Hong, Sung Yun,Lee, Jin Kyu,Lee, Hyunjoo,Lee, Sang Deuk,Cheong, Minserk,Kim, Hoon Sik American Chemical Society 2011 The Journal of physical chemistry B Vol.115 No.5
<P>Room temperature ionic liquids (RTILs) are proposed as the alternative solvents for the acetylene separation in ethylene generated from the naphtha cracking process. The solubility behavior of acetylene in RTILs was examined using a linear solvation energy relationship based on Kamlet−Taft solvent parameters including the hydrogen-bond acidity or donor ability (α), the hydrogen-bond basicity or acceptor ability (β), and the polarity/polarizability (π*). It is found that the solubility of acetylene linearly correlates with β value and is almost independent of α or π*. The solubility of acetylene in RTILs increases with increasing hydrogen-bond acceptor (HBA) ability of the anion, but is little affected by the nature of the cation. Quantum mechanical calculations demonstrate that the acidic proton of acetylene specifically forms hydrogen bond with a basic oxygen atom on the anion of a RTIL. On the other hand, although C−H···π interaction is plausible, all optimized structures indicate that the acidic protons on the cation do not specifically associate with the π cloud of acetylene. Thermodynamic analysis agrees well with the proposed correlation: the higher the β value of a RTIL is, the more negative the enthalpy of acetylene absorption in the RTIL is.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2011/jpcbfk.2011.115.issue-5/jp108351f/production/images/medium/jp-2010-08351f_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp108351f'>ACS Electronic Supporting Info</A></P>
Jelliarko Palgunadi,Je Eun Kang,정민석,김홍곤,이현주,Hoon Sik Kim 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.8
Solubilities of carbon dioxide (CO2) in a series of fluorine-free room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates and dialkylimidazolium alkylphosphites, were measured at 313∼333 K and pressures up to 5 MPa. Henry’s law coefficients as the solubility parameter of CO2 in RTILs were derived from the isotherm of fugacity versus CO2 mole fraction. The CO2 solubility in a phosphorus-containing RTIL was found to increase with the increasing molar volume of the RTIL. In general, dialkylimidazolium dialkylphosphate exhibited higher absorption capacity than dialkylimidazolium alkylphosphite as long as the RTILs possess an identical cation. Among RTILs tested, 1-butyl-3-methylimidazolium dibutylphosphate [BMIM][Bu2PO4] and 1-butyl-3-methylimidazolium butylphosphite [BMIM][BuHPO3] exhibited similar Henry’s law coefficients to 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([BMIM][Tf2N]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), respectively. The Krichevsky-Kasarnovsky equation was employed to derive the CO2 solubility parameter (Henry’s law coefficient) from the solubility data measured at elevated pressures.
Kim, Jin Hyung,Palgunadi, Jelliarko,Mukherjee, Deb Kumar,Lee, Hyun Joo,Kim, Honggon,Ahn, Byoung Sung,Cheong, Minserk,Kim, Hoon Sik Royal Society of Chemistry 2010 Physical chemistry chemical physics Vol.12 No.42
<P>A Cu(<SMALL>I</SMALL>)-containing room temperature ionic liquid (Cu-RTIL), prepared from CuCl and 1,3-dimethylimidazolium methylphosphite ([DMIM][MeHPO<SUB>3</SUB>]), was found to reversibly and selectively interact with propyne over propylene. Cu-RTIL exhibited 12 times higher propyne absorption capacity and 14 times higher ideal propyne/propylene selectivity than [DMIM][MeHPO<SUB>3</SUB>]. Fast atom bombardment (FAB)-mass spectral and computational results with Cu-RTIL (CuCl/[DMIM][MeHPO<SUB>3</SUB>] = 1/2) strongly imply that the Cu-RTIL contains stable methylphosphite-coordinated anionic Cu(<SMALL>I</SMALL>) species such as CuCl(MeHPO<SUB>3</SUB>)<SUP>−</SUP> and Cu(MeHPO<SUB>3</SUB>)<SUB>2</SUB><SUP>−</SUP>. Computational studies on the optimized structures demonstrate that the preferential absorption of propyne over propylene in a Cu-RTIL originates from the difference in the interaction mode between the coordinated phosphite ligand and propyne or propylene. Strong π-complexation of propylene and propyne with Cu in Cu-RTIL is not observed.</P> <P>Graphic Abstract</P><P>A Cu(<SMALL>I</SMALL>)-containing room temperature ionic liquid (Cu-RTIL), prepared from CuCl and 1,3-dimethylimidazolium methylphosphite ([DMIM][MeHPO<SUB>3</SUB>]), was found to reversibly and selectively interact with propyne over propylene. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c004140h'> </P>
Ether-functionalized ionic liquids as highly efficient SO<sub>2</sub> absorbents
Hong, Sung Yun,Im, Jinkyu,Palgunadi, Jelliarko,Lee, Sang Deuk,Lee, Je Seung,Kim, Hoon Sik,Cheong, Minserk,Jung, Kwang-Deog Royal Society of Chemistry 2011 Energy & environmental science Vol.4 No.5
<P>Room temperature ionic liquids (RTILs), ether-functionalized imidazolium methanesulfonates, exhibit extremely high SO<SUB>2</SUB> solubility, at least 2 moles of SO<SUB>2</SUB> per mole of RTIL at 30 °C and at atmospheric pressure. The solubility of SO<SUB>2</SUB> in these RTILs increases with increasing number of tethered ether oxygen atoms and also with the pressure rise. FT-IR spectroscopic and quantum mechanical calculation results show that such high SO<SUB>2</SUB> solubility is originated from the combined interactions of SO<SUB>2</SUB> with methanesulfonate anion and ether oxygen atom or atoms on the imidazolium ring. The absorbed SO<SUB>2</SUB> gas can be readily and completely desorbed from the RTILs by heating at 100 °C in a N<SUB>2</SUB> flow, thereby allowing the RTILs to be reused up to 5 cycles without loss of their initial capacity.</P> <P>Graphic Abstract</P><P>Ether-functionalized imidazolium-based ionic liquids bearing a methanesulfonate anion are highly effective for the reversible absorption of SO<SUB>2</SUB>. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0ee00616e'> </P>