Protonation and deprotonation induced organo/hydrogelation: Bile acid derived gelators containing a basic side chain
نویسندگان
چکیده
Two bile acid derived molecules containing basic amino groups are reported to be efficient and unusual gelators of organic and aqueous solvents.
منابع مشابه
Effect of Ionic Strength on Deprotonation of Salicylic Acid and its Derivative
The protonation constant values of salicylic and 5-nitrosalicylic acid werestudied by a combinationof spectrophotometric and potentiometric methods at 25 °C in wide range of ionic strength. The ionicstrength of solutions was kept constant by sodium perchlorate as background electrolyte at 0.10 to 3.0 moldm-3. Potentiometer was calibrated according to Gran method at each of ionic strength. The p...
متن کاملDirect observation of protonation reactions during the catalytic cycle of cytochrome c oxidase.
Cytochrome c oxidase, the terminal protein in the respiratory chain, converts oxygen into water and helps generate the electrochemical gradient used in the synthesis of ATP. The catalytic action of cytochrome c oxidase involves electron transfer, proton transfer, and O2 reduction. These events trigger specific molecular changes at the active site, which, in turn, influence changes throughout th...
متن کاملToward the Understanding of the Metabolism of Levodopa I. DFT Investigation of the Equilibrium Geometries, Acid-Base Properties and Levodopa-Water Complexes
Levodopa (LD) is used to increase dopamine level for treating Parkinson's disease. The major metabolism of LD to produce dopamine is decarboxylation. In order to understand the metabolism of LD; the electronic structure of levodopa was investigated at the Density Functional DFT/B3LYP level of theory using the 6-311+G** basis set, in the gas phase and in solution. LD is not planar, with the amin...
متن کاملAn additional fluorenylmethoxycarbonyl (Fmoc) moiety in di-Fmoc-functionalized L-lysine induces pH-controlled ambidextrous gelation with significant advantages.
In recent years, several fluorenylmethoxycarbonyl (Fmoc)-functionalized amino acids and peptides have been used to construct hydrogels, which find a wide range of applications. Although several hydrogels have been prepared from mono Fmoc-functionalized amino acids, herein, we demonstrate the importance of an additional Fmoc-moiety in the hydrogelation of double Fmoc-functionalized L-lysine [Fmo...
متن کاملProtonation and lanthanide(III) complexation equilibria of a new tripodal polyaza-polycatechol-amine.
The sulfonated tripodal polyaza-polycatechol-amine ligand tris(2,3-hydroxy-5-sulfobenzylamine) ethyl)amine (STRENCAT) was synthesized and its protonation constants determined by potentiometry at 25 degrees C and in 0.1 mol dm(-3) NaClO(4). In the adopted experimental conditions (2.5 < p[H(+)] < 11.5), six of the virtual thirteen protonation constants of STRENCAT were determined. The deprotonati...
متن کامل