Photodissociation dynamics of tryptophan and the implication of asymmetric photolysis

2010 ◽  
Vol 133 (7) ◽  
pp. 074307 ◽  
Author(s):  
Chien-Ming Tseng ◽  
Yuri A. Dyakov ◽  
Huai Ching Huang ◽  
Kuan Yu Huang ◽  
Yuan T. Lee ◽  
...  
Keyword(s):  
Asymmetric Photolysis

Asymmetric photolysis of (RS)-leucine with circularly polarized ultraviolet light

1977 ◽  
Vol 99 (11) ◽  
pp. 3622-3625 ◽  
Author(s):  
Jose J. Flores ◽  
William A. Bonner ◽  
Gail A. Massey
Keyword(s):  
Ultraviolet Light ◽  
Circularly Polarized ◽  
Asymmetric Photolysis

Asymmetric photolysis of biomolecules under high-intensity UV laser irradiation

1990 ◽  
Vol 147 (2-3) ◽  
pp. 437-445 ◽  
Author(s):  
D.N. Nikogosyan ◽  
Yu.A. Repeyev ◽  
E.V. Khoroshilova ◽  
I.V. Kryukov ◽  
E.V. Khoroshilov ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
High Intensity ◽  
Uv Laser ◽  
Asymmetric Photolysis

scholarly journals Circular Polarisation in Star Forming Regions: The Origin of Homochirality?

2004 ◽  
Vol 213 ◽  
pp. 145-148
Author(s):  
P. W. Lucas ◽  
J. H. Hough ◽  
A. C. Chrysostomou ◽  
J. A. Bailey
Keyword(s):  
Effective Means ◽  
Enantiomeric Excess ◽  
Natural World ◽  
Chiral Molecules ◽  
Star Forming ◽  
Star Forming Regions ◽  
Murchison Meteorite ◽  
Asymmetric Photolysis ◽  
Polarised Light ◽  
Origin Of Homochirality

The origin of homochirality is one of the longest-standing puzzles in understanding the origins of life. In the laboratory, illumination by circularly polarised UV radiation (asymmetric photolysis) is an effective means of producing an enantiomeric excess in an otherwise racemic mix of chiral molecules. In the natural world, however, it has proven difficult to identify a suitable source of Circularly Polarised Light (CPL). Recent observations of L-excesses of 2–9% for a number of α-methyl amino acids in the Murchison meteorite and our discovery of large degrees of CPL in some star forming regions has added weight to the suggestion that the origin of homochirality is extra-terrestrial. Here we report initial modelling of the production of that CPL.

scholarly journals Astronomical Sources of Circularly Polarized Light and Their Role in Determining Molecular Chirality on Earth

1985 ◽  
Vol 112 ◽  
pp. 171-175
Author(s):  
Ramon D. Wolstencroft
Keyword(s):  
Polarized Light ◽  
Racemic Mixture ◽  
Relative Importance ◽  
Chiral Molecules ◽  
Direct Sunlight ◽  
Primitive Earth ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Chiral Selection ◽  
Asymmetric Photolysis

The major source of circularly polarized flux potentially capable of inducing asymmetric photolysis of a racemic mixture of chiral molecules on the primitive Earth is the daytime sky. The degree of circular polarization (q) depends on the slope and orientation of the local terrain which obscures part of the sky. After allowance for dilution by direct sunlight values of |q| range between about 10−4 and 10−5. The rates of (1) asymmetric photolysis, (2) chiral selection by the electro-weak process and (3) racemization are not yet well enough known for the relative importance of these processes to be definitely established.

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