The Structure of Glycine Dihydrate: Implications for the Crystallization of Glycine from Solution and Its Structure in Outer Space
[1];
[2];
[3]
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439 USA
- Department of Physics and Astronomy, High Pressure Science and Engineering Center, University of Nevada Las Vegas, Las Vegas NV 89154 USA; Department of Geosciences, Stony Brook University, Stony Brook NY 11794 USA
- Department of Chemistry, New York University, 100 Washington Square East New York NY 10003 USA
Glycine, the simplest amino acid, is also the most polymorphous. Herein, we report the structure determination of an unknown phase of glycine which was firstly reported by Pyne and Suryanarayanan in 2001. To date, the new phase has only been prepared at 208 K as nanocrystals within ice. Through computational crystal structure prediction and powder X-ray diffraction methods, we identified this elusive phase as glycine dihydrate (GDH), representing a first report on a hydrated glycine structure. The structure of GDH has important implications for the state of glycine in aqueous solution, and the mechanisms of glycine crystallization. GDH may also be the form of glycine that comes to Earth from extraterrestrial sources.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1394828
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 56, Issue 8; ISSN 1433-7851
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
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