Intermacromolecular complexation due to specific interactions. 7. Miscibility and complexation between poly(styrene-co-4-vinyl benzoic acid) and poly[n-butyl methacrylate-co-(4-vinylpyridine)]

1998 ◽  
Vol 37 (6) ◽  
pp. 827-839 ◽  
Author(s):  
Lei Zhu ◽  
Ming Jiang ◽  
Lu Liu ◽  
Hui Zhou ◽  
Lijuan Fan ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Butyl Methacrylate ◽  
Specific Interactions

Molecular Recognition Analyzed by Observing Intramolecular Interconversion with EPR Spectroscopy

1998 ◽  
Vol 53 (12) ◽  
pp. 1511-1519 ◽  
Author(s):  
Martin Jäger ◽  
Paul Schuler ◽  
Hartmut B. Stegmann ◽  
Antal Rockenbauer
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Recognition ◽  
Benzoic Acid ◽  
Molecular Interactions ◽  
Epr Spectroscopy ◽  
Specific Interactions ◽  
Binding Modes ◽  
Butyl Phenol ◽  
Site Exchange ◽  
Formation Conditions

Abstract Molecular recognition between Rebek’s cleft R and 4-(2-benzimidazolyl)-aminomethyl-2,6-di-rm-butyl-phenol (Bi) is investigated by means of EPR spectroscopy. Their specific inter-molecular interactions are distinguished from non-specific interactions represented by mere protonation on addition of benzoic acid. Both interactions are related to intramolecular in­ terconversions at the C∞-atom of Bi*, where a two-jump mechanism is found for free and protonated Bi* and a two-site exchange for the complexed ligand. While NMR spectroscopy indicates the existence of 1:1 and 1:2 receptor-substrate complexes, the faster time scale of EPR spectroscopy allows to identify one 1 : 2 as well as three 1 : 1 associates and to elucidate their formation conditions. Based upon the corresponding hf parameters, binding modes and sites are proposed for the key-in-the-lock system.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Bjerkandera adusta as a source of benzoic acid derivatives targeting 26S proteasome and cathepsins B&L

2019 ◽  
Author(s):  
K Georgousaki ◽  
N Tsafantakis ◽  
S Gumeni ◽  
V González-Menéndez ◽  
G Lambrinidis ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
26S Proteasome ◽  
Bjerkandera Adusta ◽  
Benzoic Acid Derivatives
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