1
|
Khazaei A, Zolfigol MA, Faal-Rastegar T. Ionic Liquid Tributyl (Carboxymethyl) Phosphonium Bromide as an efficient Catalyst for the Synthesis of bis(indolyl)Methanes under Solvent-Free Conditions. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751913x13787959859380] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Ardeshir Khazaei
- Department of Chemistry, University of Bu-Ali Sina, Zip Code 65178, Hamedan, Iran
| | | | - Toktam Faal-Rastegar
- Department of Chemistry, University of Bu-Ali Sina, Zip Code 65178, Hamedan, Iran
| |
Collapse
|
2
|
Ajay Mallia V, Weiss RG. Correlations between thixotropic and structural properties of molecular gels with crystalline networks. SOFT MATTER 2016; 12:3665-3676. [PMID: 27052003 DOI: 10.1039/c6sm00377j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This review focuses on correlations between the thixotropic and structural properties of molecular gels having crystalline fibrillar networks (SAFINs). Formation of thixotropic molecular gels and their recovery after the application of destructive strain depends on the strength and type of intermolecular interactions in the SAFINs of the gelator molecules. Here, we limit our discussion to gelator molecules with simple structures in order to dissect more easily the important contributors to the thixotropic behaviors. Possible mechanisms to explain the thixotropic phenomena, involving the transformation of the SAFINs into unattached objects, and their reassembly into 3-dimensional networks, are advanced. The data are analyzed to provide insights into the rational design of thixotropic molecular gelators.
Collapse
Affiliation(s)
- V Ajay Mallia
- Department of Chemistry, Georgetown University, Washington DC 20057-1227, USA.
| | - Richard G Weiss
- Department of Chemistry, Georgetown University, Washington DC 20057-1227, USA. and Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington DC 20057-1227, USA
| |
Collapse
|
3
|
Goossens K, Lava K, Bielawski CW, Binnemans K. Ionic Liquid Crystals: Versatile Materials. Chem Rev 2016; 116:4643-807. [PMID: 27088310 DOI: 10.1021/cr400334b] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This Review covers the recent developments (2005-2015) in the design, synthesis, characterization, and application of thermotropic ionic liquid crystals. It was designed to give a comprehensive overview of the "state-of-the-art" in the field. The discussion is focused on low molar mass and dendrimeric thermotropic ionic mesogens, as well as selected metal-containing compounds (metallomesogens), but some references to polymeric and/or lyotropic ionic liquid crystals and particularly to ionic liquids will also be provided. Although zwitterionic and mesoionic mesogens are also treated to some extent, emphasis will be directed toward liquid-crystalline materials consisting of organic cations and organic/inorganic anions that are not covalently bound but interact via electrostatic and other noncovalent interactions.
Collapse
Affiliation(s)
- Karel Goossens
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Kathleen Lava
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium.,Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry and Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Republic of Korea
| | - Koen Binnemans
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| |
Collapse
|
4
|
Mallia VA, Weiss RG. Structural bases for mechano-responsive properties in molecular gels of (R)-12-hydroxy-N-(ω-hydroxyalkyl)octadecanamides. Rates of formation and responses to destructive strain. SOFT MATTER 2015; 11:5010-5022. [PMID: 26007154 DOI: 10.1039/c5sm00353a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The self-assembly and gelation behavior of a series of (R)-12-hydroxy-N-(ω-hydroxyalkyl)octadecanamides (HS-n-OH, where n = 2, 3, 4 and 5 is the length of the alkyl chain on nitrogen), as well as those of two ‘model’ compounds, N-(3-hydroxypropyl)octadecanamide (S-3-OH) and (R)-12-hydroxy-N-propyloctadecanamide (HS-3), have been investigated in a wide range of liquids. A unique aspect of some of the HS-n-OH gels is the degree and velocity of their recovery of viscoelasticity after the cessation of destructive shear. The recovery times vary from less than one second to hundreds of seconds, depending on the length of the ω-hydroxyalkyl group on nitrogen. The data indicate that the modes and dynamics of aggregation of the gelator molecules from incubation of a sol phase below the gel melting temperature, as analyzed by Avrami and fractal equations, cannot be used to explain the degree and dynamics of the thixotropy: sol-to-gel transformations involve assembly of 0-dimensional objects (i.e., individual gelator molecules) into 1-dimensional fibrils and then into 3-dimensional networks; recovery after mechano-destruction of gels requires only 1-dimensional to 3-dimensional re-assembly or re-association of 3-dimensional spherulitic objects. A model to understand the extreme sensitivity of the thixotropy on the length of the ω-hydroxyalkyl group in the HS-n-OH (which is based upon detailed comparisons among the dynamic properties of the gels, the morphologies of the neat gelators, and the fibrillar networks of the gels) invokes the importance of the cleavage and reformation of H-bonds between fibers at ‘junction zones’ or between spherulitic objects.
Collapse
Affiliation(s)
- V Ajay Mallia
- Department of Chemistry, Georgetown University, Washington, DC 20057-1227, USA.
| | | |
Collapse
|
5
|
Li T, Xu F, Shi W. Ionic liquid crystals based on 1-alkyl-3-methylimidazolium cations and perfluorinated sulfonylimide anions. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
6
|
Stappert K, Mudring AV. Triazolium based ionic liquid crystals: effect of asymmetric substitution. RSC Adv 2015. [DOI: 10.1039/c4ra14961k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A new series of asymmetrical 1-dodecyl-3-alkyl-triazolium bromides has been synthesized to investigate the effect of asymmetric substitution on their phase behavior.
Collapse
Affiliation(s)
- K. Stappert
- Anorganische Chemie III – Materials Engineering and Characterization
- Fakultät für Chemie and Biochemie
- Ruhr-Universität Bochum
- Bochum
- Germany
| | - A.-V. Mudring
- Anorganische Chemie III – Materials Engineering and Characterization
- Fakultät für Chemie and Biochemie
- Ruhr-Universität Bochum
- Bochum
- Germany
| |
Collapse
|
7
|
Quiroz-Guzman M, Fagnant DP, Chen XY, Shi C, Brennecke JF, Goff GS, Runde W. Synthesis and characterization of the thermodynamic and electrochemical properties of tetra-alkyl phosphonium oxalate ionic liquids. RSC Adv 2014. [DOI: 10.1039/c4ra01467g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
8
|
He X, Lin JB, Kan WH, Baumgartner T. Phosphinine Lipids: A Successful Marriage between Electron-Acceptor and Self-Assembly Features. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303729] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
9
|
He X, Lin JB, Kan WH, Baumgartner T. Phosphinine Lipids: A Successful Marriage between Electron-Acceptor and Self-Assembly Features. Angew Chem Int Ed Engl 2013; 52:8990-4. [DOI: 10.1002/anie.201303729] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Indexed: 11/08/2022]
|
10
|
D'Anna F, Nimal Gunaratne HQ, Lazzara G, Noto R, Rizzo C, Seddon KR. Solution and thermal behaviour of novel dicationic imidazolium ionic liquids. Org Biomol Chem 2013; 11:5836-46. [DOI: 10.1039/c3ob40807h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
11
|
Chen XY, Goff GS, Quiroz-Guzman M, Fagnant DP, Brennecke JF, Scott BL, Runde W. Directed nucleation of monomeric and dimeric uranium(vi) complexes with a room temperature carboxyl-functionalized phosphonium ionic liquid. Chem Commun (Camb) 2013; 49:1903-5. [DOI: 10.1039/c2cc38255e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
Hui JKH, Jiang J, MacLachlan MJ. Unexpected lyotropic liquid crystals from ion-induced columnar assembly of Schiff-base macrocycles. CAN J CHEM 2012. [DOI: 10.1139/v2012-063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Schiff-base macrocycles 1, which have a crown ether-like interior, form ionic nematic lyotropic liquid crystals in various organic solvents when functionalized with long alkoxy substituents and complexed to diverse ammonium and alkali metal salts. From X-ray diffraction and transmission electron microscopy studies, and by comparison with the organization of macrocycles functionalized with shorter chains, these macrocycles assemble into lyotropic liquid crystals where the macrocycles are stacked and the cation is included in their interiors.
Collapse
Affiliation(s)
- Joseph K.-H. Hui
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Jian Jiang
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Mark J. MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| |
Collapse
|
13
|
Butschies M, Frey W, Laschat S. Designer Ionic Liquid Crystals Based on Congruently Shaped Guanidinium Sulfonates. Chemistry 2012; 18:3014-22. [DOI: 10.1002/chem.201101925] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 09/27/2011] [Indexed: 11/05/2022]
|
14
|
Taguchi S, Ichikawa T, Kato T, Ohno H. Nano-biphasic ionic liquid systems composed of hydrophobic phosphonium salts and a hydrophilic ammonium salt. Chem Commun (Camb) 2012; 48:5271-3. [DOI: 10.1039/c2cc31074k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Gainanova GA, Vagapova GI, Syakaev VV, Ibragimova AR, Valeeva FG, Tudriy EV, Galkina IV, Kataeva ON, Zakharova LY, Latypov SK, Konovalov AI. Self-assembling systems based on amphiphilic alkyltriphenylphosphonium bromides: elucidation of the role of head group. J Colloid Interface Sci 2011; 367:327-36. [PMID: 22134214 DOI: 10.1016/j.jcis.2011.10.074] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 10/30/2011] [Accepted: 10/31/2011] [Indexed: 11/28/2022]
Abstract
A systematic study of the aggregation behavior of alkyltriphenylphosphonium bromides (TPPB-n; n=8, 10, 12, 14, 16, 18; here n is the number of carbon atoms in alkyl groups) in aqueous solutions has been carried out and compared with trimethyl ammonium bromides (TMAB-n). Critical micelle concentrations (cmcs) of TPPB-n and TMAB-n decrease with the number of carbon atoms with the slope parameter of ca.0.3. The low cmcs and effective solubilization power toward Orange OT indicate high micellization capacity of phosphonium surfactants. The low counterion binding parameter β is revealed for TPPB-10 and TPPB-12, while high counterion binding of ≥80% is observed for high TPPB-n homologs. Values of the surface potential ψ calculated on the basis of pK(a) shifts of p-nitrophenols is similar for both series and monotonously increase with alkyl chain length. Several points indicate non-monotonic changes within TPPB-n series. There are peculiarities of the tensiometry and solubilization plots for high homologs and above mentioned increases in counterion binding on transiting from low to high molecular weight surfactants. Differences in aggregation behavior between TPPB and TMAB series and between low and high homologs can be due to the specific structural character of the TPP(+) cation, which is supported by X-ray data.
Collapse
Affiliation(s)
- Gulnara A Gainanova
- A.E. Arbuzov Institute of Organic and Physical Chemistry of the Russian Academy of Sciences, 8, ul. Akad. Arbuzov, Kazan 420088, Russia
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Mallia VA, Terech P, Weiss RG. Correlations of Properties and Structures at Different Length Scales of Hydro- and Organo-gels Based on N-Alkyl-(R)-12-Hydroxyoctadecylammonium Chlorides. J Phys Chem B 2011; 115:12401-14. [DOI: 10.1021/jp207182p] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- V. Ajay Mallia
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227, United States
| | - Pierre Terech
- SPrAM, UMR CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France
| | - Richard G. Weiss
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227, United States
| |
Collapse
|
17
|
Ren Y, Kan WH, Henderson MA, Bomben PG, Berlinguette CP, Thangadurai V, Baumgartner T. External-Stimuli Responsive Photophysics and Liquid Crystal Properties of Self-Assembled “Phosphole-Lipids”. J Am Chem Soc 2011; 133:17014-26. [DOI: 10.1021/ja206784f] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yi Ren
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Wang Hay Kan
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Matthew A. Henderson
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Paolo G. Bomben
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Curtis P. Berlinguette
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Venkataraman Thangadurai
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Thomas Baumgartner
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| |
Collapse
|
18
|
Ueda S, Kagimoto J, Ichikawa T, Kato T, Ohno H. Anisotropic proton-conductive materials formed by the self-organization of phosphonium-type zwitterions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:3071-3074. [PMID: 21608051 DOI: 10.1002/adma.201100942] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Saori Ueda
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo, Japan
| | | | | | | | | |
Collapse
|
19
|
Tolstikova LL, Bel’skikh AV, Shainyan BA. Protonation and alkylation of organophosphorus compounds with trifluoromethanesulfonic acid derivatives. RUSS J GEN CHEM+ 2011. [DOI: 10.1134/s1070363211030054] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
20
|
Axenov KV, Laschat S. Thermotropic Ionic Liquid Crystals. MATERIALS 2011; 4:206-259. [PMID: 28879986 PMCID: PMC5448481 DOI: 10.3390/ma4010206] [Citation(s) in RCA: 273] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 12/27/2010] [Indexed: 12/26/2022]
Abstract
The last five years’ achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed.
Collapse
Affiliation(s)
- Kirill V Axenov
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| |
Collapse
|
21
|
Lin JCY, Huang CJ, Lee YT, Lee KM, Lin IJB. Carboxylic acid functionalized imidazolium salts: sequential formation of ionic, zwitterionic, acid-zwitterionic and lithium salt-zwitterionic liquid crystals. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10580a] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
Taguchi S, Matsumoto T, Ichikawa T, Kato T, Ohno H. Gelation of an amino acid ionic liquid by the addition of a phosphonium-type zwitterion. Chem Commun (Camb) 2011; 47:11342-4. [DOI: 10.1039/c1cc14455c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Wei Z, Wei X, Wang X, Wang Z, Liu J. Ionic liquid crystals of quaternary ammonium salts with a 2-hydroxypropoxy insertion group. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10236b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Butschies M, Sauer S, Kessler E, Siehl H, Claasen B, Fischer P, Frey W, Laschat S. Influence ofN‐Alkyl Substituents and Counterions on the Structural and Mesomorphic Properties of Guanidinium Salts: Experiment and Quantum Chemical Calculations. Chemphyschem 2010; 11:3752-65. [DOI: 10.1002/cphc.201000444] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martin Butschies
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| | - Sven Sauer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| | - Elena Kessler
- Institut für Organische Chemie I, Universität Ulm, Albert Einstein Allee 11D‐89069 Ulm (Germany), Fax: +(49) 731‐502‐2787
| | - Hans‐Ullrich Siehl
- Institut für Organische Chemie I, Universität Ulm, Albert Einstein Allee 11D‐89069 Ulm (Germany), Fax: +(49) 731‐502‐2787
| | - Birgit Claasen
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| | - Peter Fischer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55D‐70569 Stuttgart (Germany), Fax: (+49) 711‐68564285
| |
Collapse
|
25
|
Cristiano R, Walls AD, Weiss RG. Sequential bromination reactions from beads with methyltriphenylphosphonium tribromide groups. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1694] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
26
|
Cristiano R, Ma K, Pottanat G, Weiss RG. Tetraalkylphosphonium Trihalides. Room Temperature Ionic Liquids As Halogenation Reagents. J Org Chem 2009; 74:9027-33. [DOI: 10.1021/jo901735h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rodrigo Cristiano
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227
| | - Kefeng Ma
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227
| | - George Pottanat
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227
| | - Richard G. Weiss
- Department of Chemistry, Georgetown University, Washington, D.C. 20057-1227
| |
Collapse
|
27
|
Fabris M, Lucchini V, Noè M, Perosa A, Selva M. Ionic Liquids Made with Dimethyl Carbonate: Solvents as well as Boosted Basic Catalysts for the Michael Reaction. Chemistry 2009; 15:12273-82. [DOI: 10.1002/chem.200901891] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|