Face-selective crystal growth behavior of L-aspartic acid in the presence of L-asparagine
Abstract
The kinetic mechanism of L-asparagine (L-Asn) action on L-aspartic acid (L-Asp) crystal growth, namely the face-selective effect of L-Asn on the L-Asp crystal growth rate in each direction, was examined. In the a-axis direction, the effect of L-Asn on the L-Asp crystal growth rate was small. Enhancement and inhibition of L-Asp crystal growth, and interestingly the dissolution of the L-Asp crystal face, were observed in the b-axis direction, depending on the amount of L-Asn added. In the c-axis direction, the L-Asp crystal growth rate decreased with the increase in the amount of L-Asn added, and the experimental results were well fitted with a Langmuir adsorption isotherm. The study showed that there were crystal growth conditions where enhancement and inhibition, as well as inhibition and dissolution, coexisted in the presence of an additive with a structure similar to the growing crystal.
- Publication:
-
Journal of Crystal Growth
- Pub Date:
- February 2016
- DOI:
- 10.1016/j.jcrysgro.2015.12.006
- Bibcode:
- 2016JCrGr.436...99S
- Keywords:
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- A1. Crystal morphology;
- A1. Crystal structure;
- A1. Growth models;
- A1. Impurities;
- A1. Optical microscopy;
- B1. Organic compounds