NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Asymmetric photolysis of /RS/-leucine with circularly polarized ultraviolet light(RS)-leucine in 0.1 M HCl solution has been subjected to photolysis with 212.8-nm right (R-) and left circularly polarized light (LCPL) obtained from a laser source. RCPL preferentially photolyzed the (R)-leucine component and LCPL the (S)-leucine component of the RS substrate. The enantiomeric excess produced were 1.98% for the 59% conversion with RCPL and 2.50% for the 75% conversion with LCPL. These 'equal and opposite' effects represent the second highest enantiomeric enrichments yet reported for an asymmetric photolysis and the first ever reported for a prebiotically important substrate - an amino acid. Implications regarding the origin of optical activity are briefly discussed.
Document ID
19770058801
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Flores, J. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Bonner, W. A.
(NASA Ames Research Center Moffett Field, CA, United States)
Massey, G. A.
(NASA Ames Research Center Moffett Field; Stanford University, Stanford, Calif.; Oregon Graduate Center for Study and Research, United States)
Date Acquired
August 9, 2013
Publication Date
May 25, 1977
Publication Information
Publication: American Chemical Society
Subject Category
Chemistry And Materials (General)
Accession Number
77A41653
Funding Number(s)
CONTRACT_GRANT: NGL-05-020-582
CONTRACT_GRANT: NSF GB-43630
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available