UV picosecond laser-induced formation of amino acids from aqueous solutions of ammonic salts of dicarboxylic acids

Letokhov, V. S.; Matveetz, Yu. A.; Семчишен, В. А.; Khoroshilova, E. V.

doi:10.1007/bf00692545

Cited by 16 publications

(2 citation statements)

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“…The fact that the quantum yield of fl-alanine depends on the laser intensity points to a nonlinear nature of the process that has been already proposed for the similar synthesis of amino acids. 4 To check up the conclusion that photochemical formation of amino acids is a result of excitation of high lying electronic states of the molecules of ammonium salts of unsaturated acids, the aqueous solution of ammounium acrylate was irradiated with hydrogen lamp producing the vacuum ultraviolet range radiation, 140 + 160 nm. As a result a molecule of salt was directly excited to high-lying singlet electronic state by a single VUV light quantum whose energy is approximately the sum of laser light two quanta energy.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3] The use of a powerful laser source of UV radiation with its pulse duration of the order of a few picoseconds made it possible to synthesize amino acids in solutions of ammonium salts of tr,/-unsaturated dicarboxylic acids by effecting the two-step excitation of the higher electronic states in the parent molecules. 4 The process of nonlinear photochemical formation of amino acids was found to display some specific features: 1) an amino acid was the only photoproduct corresponding to the addition of ammonia to the C--C bond;…”

Section: Introductionmentioning

confidence: 99%

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Alanine Formation in Aqueous Solution of Ammonium Acrylate Induced by UV Picosecond LaserPulses

1987

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Formation of amino acids (α- and β-alanine) and oligomers containing NH2-groups, have been discovered under the irradiation of aqueous solution of ammonium acrylate by picosecond laser pulses with intensity up to 1 GW/cm2, λ = 266 nm.The composition of photoproducts was shown to depend on intensity of laser pulses. The laser intensity dependence of the β-alanine quantum yield was of a nonlinear character. The β-alanine formation occurred under the excitation of highly singlet electronic states of ammonium acrylate molecule by two quanta of UV or one quantum of VUV light. The unimolecular mechanism of amino acid formation in such a reaction was suggested.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Alanine Formation in Aqueous Solution of Ammonium Acrylate Induced by UV Picosecond LaserPulses

1987

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Polymer catalysts for important photoelectron transfer reactions

Guillet

Burke

Nowakowska

et al. 1998

Macromolecular Symposia

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Photozymes are novel water-soluble polymers made by the copolymerization of mixtures of hydrophobic and hydrophilic monomers, some of which contain chromophores capable of absorbing light and transmitting the excitation energy to selected traps by means of the antenna effect. The interactions between these groups and water force the polymer to adopt a hypercoiled conformation with hydrophobic pockets similar to those in the catalytic sites of natural enzymes. Hydrophobic organic compounds in the water solution will seek out and localize themselves in these regions, where they are subjected to electronic energy transfer from the light-excited antenna chromophores. The chemical reactions which occur are often different and more specific than in the case of photoreactions in common organic solvents. In a number of cases the reactions appear to proceed by an electron transfer mechanism. This paper summarizes recent results on the dechlorination of chlorinated aromatic and aliphatic compounds, and laser studies of multiphoton processes in aromatic compounds such as 9-(acetoxymethy1)phenanthrene (AMP).

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Laserinduzierte Chemie in Lösungen, Matrizen und Adsorbatschichten

Stafast

1993

Laser in Technik Und Forschung

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UV picosecond laser-induced formation of amino acids from aqueous solutions of ammonic salts of dicarboxylic acids

Cited by 16 publications

References 6 publications

Alanine Formation in Aqueous Solution of Ammonium Acrylate Induced by UV Picosecond LaserPulses

Alanine Formation in Aqueous Solution of Ammonium Acrylate Induced by UV Picosecond LaserPulses

Polymer catalysts for important photoelectron transfer reactions

Laserinduzierte Chemie in Lösungen, Matrizen und Adsorbatschichten

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