Solubility of the Antimicrobial Agent Triclosan in Organic Solvents of Different Hydrogen Bonding Capabilities at Several Temperatures

2008 ◽  
Vol 53 (11) ◽  
pp. 2576-2580 ◽  
Author(s):  
Diana M. Aragón ◽  
Miller A. Ruidiaz ◽  
Edgar F. Vargas ◽  
Carlos Bregni ◽  
Diego A. Chiappetta ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Antimicrobial Agent ◽  
Organic Solvents

Analysis of the Visual Spectrum of Methyl Orange in Solvents and in Hydrophobic Binding Sites

1973 ◽  
Vol 51 (4) ◽  
pp. 628-635 ◽  
Author(s):  
Richard L. Reeves ◽  
Robert S. Kaiser ◽  
Mary S. Maggio ◽  
Edward A. Sylvestre ◽  
William H. Lawton
Keyword(s):  
Hydrogen Bonding ◽  
Methyl Orange ◽  
Organic Solvents ◽  
Absorption Maximum ◽  
Low Frequency ◽  
Blue Shift ◽  
Frequency Component ◽  
High Frequency Component ◽  
Surfactant Micelle ◽  
Aqueous Solvent

The absorption curves of methyl orange (MO) and analogous p-aminophenylazobenzenes in organic and aqueous organic solvents are shown to consist of two severely overlapping bands. The curves have been resolved into two skewed component bands using a regression method. The blue shift of the absorption maximum obtained when organic solvents are added to aqueous solutions of MO, or when MO is bound to bovine serum albumin or a surfactant micelle, is the result of a change in relative intensities of the component bands. The low-frequency component is assigned to a π1 → π1* transition of a solvate in which there is specific hydrogen-bonding interaction between solvent and the azo nitrogens, and the high-frequency component to a π1 → π1* transition of a solvate in which the interaction is absent. The low-frequency component is favored by aqueous solvent compositions and by low temperatures. The free energies of interconversion of the species in various hydrogen-bonding solvents are correlated by the solvent surface tension but not by the dielectric constant. The results show that the shift in absorption maximum accompanying binding to a protein or micelle should be interpreted as a shift in an equilibrium rather than as a shift in transition energy.

A fluorescent “glue” of water triggered by hydrogen-bonding cross-linking

2016 ◽  
Vol 4 (47) ◽  
pp. 11050-11054 ◽  
Author(s):  
Dejia Wang ◽  
Hongwei Zhao ◽  
Hongjuan Li ◽  
Shiguo Sun ◽  
Yongqian Xu
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Organic Molecule ◽  
Linear Range ◽  
Cross Linking ◽  
The Novel ◽  
Aggregation Induced Emission ◽  
Small Organic Molecule ◽  
Wide Linear Range ◽  
Trace Water

As a “glue” of water, a small organic molecule with the novel hydrogen-bonding cross-linked aggregation-induced emission (AIE) property was designed to detect trace water, displaying a wide linear range (0–40%, v/v) in most of the organic solvents.

Remarkable Viscoelasticity of Organic Solvents Containing Trialkyl-1,3,5-benzenetricarboxamides and Their Intermolecular Hydrogen Bonding

1997 ◽  
Vol 26 (5) ◽  
pp. 429-430 ◽  
Author(s):  
Kenji Hanabusa ◽  
Chiemi Koto ◽  
Mutsumi Kimura ◽  
Hirofusa Shirai ◽  
Akikazu Kakehi
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Intermolecular Hydrogen Bonding

Acylanthranils. 10. Influence of hydrogen bonding on hydrolysis of acetylanthranil in organic solvents

1980 ◽  
Vol 45 (19) ◽  
pp. 3868-3875 ◽  
Author(s):  
L. A. Errede ◽  
J. J. McBrady ◽  
G. V. D. Tiers
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Hydrolysis Of

Accelerated Reduction and Solubilization of Elemental Sulfur By 1,2-Aminothiols

2021 ◽  
Author(s):  
Jonathan T Stoffel ◽  
Kimberly Riordan ◽  
Emily Y Tsui
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Elemental Sulfur ◽  
Hydrogen Bonding Interactions ◽  
Nonpolar Organic

Nucleophilic 1,2-aminothiol compounds readily reduce typically-insoluble elemental sulfur to polysulfides in both water and nonpolar organic solvents. The resulting anionic polysulfide species are stabilized through hydrogen-bonding interactions with the proximal...

Preparation and Properties of Novel Aromatic Polyimides from 4,4′-Diamino-4″ -Hydroxytriphenylamine and Aromatic Tetracarboxylic Dianhydrides

2000 ◽  
Vol 12 (1) ◽  
pp. 197-203 ◽  
Author(s):  
Satoshi Akimoto ◽  
Mitsutoshi Jikei ◽  
Masa-aki Kakimoto
Keyword(s):  
Aqueous Solution ◽  
Weight Loss ◽  
Hydrogen Bonding ◽  
Glass Transition ◽  
Dimethyl Sulfoxide ◽  
Organic Solvents ◽  
Phthalic Anhydride ◽  
Glass Transition Temperatures ◽  
Aromatic Polyimides ◽  
Polymer Properties

Novel aromatic polyimides containing hydroxytriphenylamine units were prepared from 4,4′-diamino-4″-hydroxytriphenylamine 1 and various aromatic tetracarboxylic dianhydrides 2. The glass transition temperatures ( Tgs) of these polyimides were in the range of 274–388 °C and the 10% weight loss temperatures ( T d10s) were above 462 and 511 °C in air and nitrogen respectively. Polyimide 4f prepared from diamine 1 and 4,4′-hexafluoroisopropylidenebis(phthalic anhydride) (6FDA) was soluble not only in organic solvents such as N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, 1, 3-dimethyl-2-imidazolidone and dimethyl sulfoxide but also in tetramethylammonium hydroxide aqueous solution. Other resulting polyimides were not soluble in organic solvents. The resulting polyimides 4 possessed Tgs about 20–70 °C higher and poorer solubilities than the previously reported polyimides prepared from 4,4′-diaminotriphenylamine and various aromatic tetracarboxylic dianhydrides. These results indicated that polymer properties such as thermal behaviour and solubilities were influenced by the intermolecular interaction of hydrogen bonding due to hydroxy units.

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