Helical folding of an arylamide polymer in water and organic solvents of varying polarity

2015 ◽  
Vol 6 (15) ◽  
pp. 2955-2961 ◽  
Author(s):  
Peng Zhang ◽  
Liang Zhang ◽  
Hui Wang ◽  
Dan-Wei Zhang ◽  
Zhan-Ting Li
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Helical Conformation ◽  
Helical Folding

An arylamide polymer is driven by the solvophobicity and hydrogen bonding to form helical conformation in solvents of different polarity.

Cooperative Effect of the Two Hydrogen Bonding Types on 11/9-Helical Folding of α/β-Peptides

2018 ◽  
Vol 39 (2) ◽  
pp. 244-249 ◽  
Author(s):  
Geunhyuk Jang ◽  
Mihye Lee ◽  
Jaeyeon Lee ◽  
Jihyun Shim ◽  
Philjae Kang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Cooperative Effect ◽  
Helical Folding

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.

Helical folding in heterogeneous foldamers without inter-residual backbone hydrogen-bonding

2012 ◽  
Vol 48 (71) ◽  
pp. 8922 ◽  
Author(s):  
Gowri Priya ◽  
Amol S. Kotmale ◽  
Rupesh L. Gawade ◽  
Deepti Mishra ◽  
Sourav Pal ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Helical Folding

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

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
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