Temperature-dependent magnetic susceptibilities study on parity-violating phase transition of d- and l-alanine crystals
✍ Scribed by Wenqing Wang; Wei Min; Fan Bai; Lin Sun; Fang Yi; Zheming Wang; Chunhua Yan; Yongming Ni; Zhongxian Zhao
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 206 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0957-4166
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✦ Synopsis
Temperature-dependent DC-magnetic susceptibility measurements were employed to test the parity violating effect in a specific phase transition of alanine crystals. An obvious difference in magnetic susceptibility between the two enantiomers was observed at temperatures lower than the transition point T c :250 K. A vibrationally generated electronic ring current model was introduced to explain this phenomenon. This parity-violating phase transition of D-alanine may be closely related to the one suggested by Salam. The different behavior of the D-and L-amino acids below the transition temperature may result in new insights into the application of low temperature enantiomeric separations and the origin of homochirality.