Hydrogen Peroxide → DL-Arginine Cerium
Reaction equation
[NH2:1][CH:2]([C:10]([OH:12])=[O:11])[CH2:3][CH2:4][CH2:5][NH:6][C:7](=[NH:9])[NH2:8].OO.[Ce:15].N[C@H](C(O)=O)CCCNC(=N)N.[N+]([O-])(O)=O>O>[NH2:1][CH:2]([C:10]([OH:12])=[O:11])[CH2:3][CH2:4][CH2:5][NH:6][C:7](=[NH:8])[NH2:9].[Ce:15]Participants
Reactant 5
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 40 °C
Procedure
Into a 600 ml glass beaker containing a magnetic stir bar was introduced 500 ml of high purity (HP) water. A 2.006 gm quantity of DL-arginine was dissolved in this volume and the solution was heated to about 40° C., forming an alkaline solution. A 10.0 gm quantity of Ce(NO3)3·6(H2O) was added, dissolved with stirring, resulting in a solution pH of about pH 6. The molar ratio of DL-arginine to cerium ion was 0.5. Then a 10 ml solution containing 1.20 gm of 50% H2O2 (0.75 molar ratio of H2O2 to cerium ion) was added slowly to the cerium and arginine solution mixture, which lowered the pH to about 4, and formed a turbid white suspension. The pH was further adjusted to about 3 by the addition of 1N HNO3, thereby forming a clear suspension. The reaction product was then held at 40° C. for 1 hour. After cooling, the final product dispersion was a clear liquid that displayed a high degree of Tyndall scattering when illuminated with a low intensity LASER beam, indicating it contained well-dispersed colloidal particles. Particle size analysis by dynamic light scattering indicated a hydrodynamic diameter of 7.7 nm with a polydispersity of 0.27.
Workup
- customforming an alkaline solution
- dissolutiondissolved
- customresulting in a solution pH of about pH 6
- customformed a turbid white suspension
- customforming a clear suspension
- temperatureAfter cooling
Sources & evidence
- ORD record
- ord-31ba3cbd361a4338805bdab4ad6cfe7b
- Source dataset
- uspto-grants-2016_04
- Patent number
- US09308265B2
Reaction notes
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