dorsal/arxiv
View SchemaLow Temperature Dependence in 1H CRAMPS & 13C CP/MAS ssNMR Spectra of Alanine Enantiomers
| Authors | Miao Zhang, Fan Bai, Wenqing Wang, Zhi Liang |
|---|---|
| Categories | |
| ArXiv ID | physics/0210111 |
| URL | https://arxiv.org/abs/physics/0210111 |
Abstract
1H RAMPS solid state NMR and 13C CP/MAS spectra of D- and L- alanine crystals were measured at temperature ranging from 220K to 295K. Some major points are as follows: (1)alpha-H and protons in the methyl group showed a spin-spin coupling effect as temperature went down in the 1H- MAS spectra of D-alanine. (2) In the 1H CRAMPS spectra, peak widths of alpha-H and beta-H showed a different trend between alanine enantiomers when temperature varied.(3) The dynamic behavior of 13C spectra showed an obvious change around 250K, which was supposed as a phase transition in alanine crystal. In the discussion section, we give these experimental phenomena a possible explanation related to chirality.
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"abstract": "1H RAMPS solid state NMR and 13C CP/MAS spectra of D- and L- alanine crystals\nwere measured at temperature ranging from 220K to 295K. Some major points are\nas follows: (1)alpha-H and protons in the methyl group showed a spin-spin\ncoupling effect as temperature went down in the 1H- MAS spectra of D-alanine.\n(2) In the 1H CRAMPS spectra, peak widths of alpha-H and beta-H showed a\ndifferent trend between alanine enantiomers when temperature varied.(3) The\ndynamic behavior of 13C spectra showed an obvious change around 250K, which was\nsupposed as a phase transition in alanine crystal. In the discussion section,\nwe give these experimental phenomena a possible explanation related to\nchirality.",
"arxiv_id": "physics/0210111",
"authors": [
"Miao Zhang",
"Fan Bai",
"Wenqing Wang",
"Zhi Liang"
],
"categories": [
"physics.bio-ph",
"physics.chem-ph"
],
"title": "Low Temperature Dependence in 1H CRAMPS \u0026 13C CP/MAS ssNMR Spectra of Alanine Enantiomers",
"url": "https://arxiv.org/abs/physics/0210111"
},
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