Simple and Inexpensive Nucleophilic Acyl Substitution of Phenols using Thiol Acetic Acid and Base Catalyst.

7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium acetate (mTBD acetate) is a protic ionic liquid that is being investigated for use in industrial processes, such as for producing textiles from cellulose. To aid in designing such processes, we have measured the densities, viscosities, and thermal conductivities of mTBD acetate and aqueous mixtures containing mTBD acetate. We also investigated how excess amounts of mTBD or acetic acid affect the density, and found that in general an excess of either component decreases the density. However, when no water is present, the sample with excess acetic acid actually has a slightly higher density than when there is an equimolar amount of acid and base. The maximum density occurs when some water is present (around 30-40 mol%). We also modeled the density data using the ePC-SAFT equation of state and provide simple correlations for calculating the viscosity and thermal conductivity of these mixtures.

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Separate mechanisms of ion oligomerization tune the physicochemical properties of n-butylammonium acetate: cation-base clusters vs. anion-acid dimers

Physical Chemistry Chemical Physics ◽

10.1039/c7cp04078d ◽

2017 ◽

Vol 19 (37) ◽

pp. 25544-25554 ◽

Cited By ~ 8

Author(s):

Paula Berton ◽

Steven P. Kelley ◽

Hui Wang ◽

Allan S. Myerson ◽

Robin D. Rogers

Keyword(s):

Acetic Acid ◽

Ionic Liquids ◽

Physicochemical Properties ◽

Protic Ionic Liquids ◽

Acid And Base

Ions comprising protic ionic liquids strongly interact with their neutral acid and base forms as exemplified by n-butylammonium acetate in the presence of excess n-butylamine or acetic acid.

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Multiarm Star Polymer-Supported Acid and Base Catalyst

Synfacts ◽

10.1055/s-2005-921705 ◽

2005 ◽

Vol 2006 (01) ◽

pp. 0086-0086

Author(s):

C. Hawker ◽

J. Fréchet ◽

B. Helms ◽

S. Guillaudeu ◽

Y. Xie ◽

...

Keyword(s):

Star Polymer ◽

Base Catalyst ◽

Acid And Base ◽

Polymer Supported

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Microporous organic nanotube network supported acid and base catalyst system for one-pot cascade reactions

New Journal of Chemistry ◽

10.1039/c6nj01457g ◽

2016 ◽

Vol 40 (9) ◽

pp. 7282-7285 ◽

Cited By ~ 11

Author(s):

Hui Zhang ◽

Linfeng Xiong ◽

Zidong He ◽

Aiqing Zhong ◽

Tianqi Wang ◽

...

Keyword(s):

Catalyst System ◽

Catalytic Performance ◽

Cascade Reactions ◽

Base Catalyst ◽

Acid Base ◽

One Pot ◽

Acid And Base ◽

Excellent Catalytic Performance

Acid/base functionalized microporous organic nanotube networks with excellent catalytic performance for one-pot cascade reactions were successfully prepared.

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Densities, Viscosities, and Thermal Conductivities of the Ionic Liquid 7-Methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium Acetate and Its Mixtures with Water

International Journal of Thermophysics ◽

10.1007/s10765-020-02742-4 ◽

2020 ◽

Vol 41 (12) ◽

Cited By ~ 1

Author(s):

Zachariah Steven Baird ◽

Petri Uusi-Kyyny ◽

Artur Dahlberg ◽

Daniel Cederkrantz ◽

Ville Alopaeus

Keyword(s):

Ionic Liquid ◽

Acetic Acid ◽

Maximum Density ◽

Equimolar Amount ◽

Industrial Processes ◽

Aqueous Mixtures ◽

Protic Ionic Liquid ◽

Density Data ◽

Acid And Base ◽

Thermal Conductivities

Abstract 7-Methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium acetate (mTBD acetate) is a protic ionic liquid that is being investigated for use in industrial processes, such as for producing textiles from cellulose. To aid in designing such processes, we have measured the densities, viscosities, and thermal conductivities of mTBD acetate and aqueous mixtures containing mTBD acetate. We also investigated how excess amounts of mTBD or acetic acid affect the density, and found that in general an excess of either component decreases the density. However, when no water is present, the sample with excess acetic acid actually has a slightly higher density than when there is an equimolar amount of acid and base. The maximum density occurs when some water is present (around 30–40 mol%). We also modeled the density data using the ePC-SAFT equation of state and provide simple correlations for calculating the viscosity and thermal conductivity of these mixtures.

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Ectodesmata as Revealed By Freeze-Etch Preparations of Plant Epidermal Cell Walls

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072782 ◽

1973 ◽

Vol 31 ◽

pp. 468-469

Author(s):

N.C. Lyon ◽

W. C. Mueller

Keyword(s):

Electron Microscopy ◽

Acetic Acid ◽

Nitric Acid ◽

Oxalic Acid ◽

Light Microscopy ◽

Epidermal Cell ◽

Cell Walls ◽

Plant Viruses ◽

Plant Leaves ◽

Thin Sections

Schumacher and Halbsguth first demonstrated ectodesmata as pores or channels in the epidermal cell walls in haustoria of Cuscuta odorata L. by light microscopy in tissues fixed in a sublimate fixative (30% ethyl alcohol, 30 ml:glacial acetic acid, 10 ml: 65% nitric acid, 1 ml: 40% formaldehyde, 5 ml: oxalic acid, 2 g: mecuric chloride to saturation 2-3 g). Other workers have published electron micrographs of structures transversing the outer epidermal cell in thin sections of plant leaves that have been interpreted as ectodesmata. Such structures are evident following treatment with Hg++ or Ag+ salts and are only rarely observed by electron microscopy. If ectodesmata exist without such treatment, and are not artefacts, they would afford natural pathways of entry for applied foliar solutions and plant viruses.

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TEM visualization of surface replicated acid and base catalyzed sol-gel glasses

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010014381x ◽

1986 ◽

Vol 44 ◽

pp. 448-449

Author(s):

George C. Ruben ◽

Merrill W. Shafer

Keyword(s):

Elevated Temperatures ◽

Sol Gel ◽

Basic Medium ◽

Glass Transition Point ◽

Structural Space ◽

Acid And Base ◽

Organometallic Precursors ◽

New Processing ◽

Gel Glasses ◽

Physical Phenomena

Traditionally ceramics have been shaped from powders and densified at temperatures close to their liquid point. New processing methods using various types of sols, gels, and organometallic precursors at low temperature which enable densificatlon at elevated temperatures well below their liquidus, hold the promise of producing ceramics and glasses of controlled and reproducible properties that are highly reliable for electronic, structural, space or medical applications. Ultrastructure processing of silicon alkoxides in acid medium and mixtures of Ludox HS-40 (120Å spheres from DuPont) and Kasil (38% K2O &62% SiO2) in basic medium have been aimed at producing materials with a range of well defined pore sizes (∼20-400Å) to study physical phenomena and materials behavior in well characterized confined geometries. We have studied Pt/C surface replicas of some of these porous sol-gels prepared at temperatures below their glass transition point.

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