Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/344690
Type: Artigo
Title: Experimental evidence for a chiral symmetry-breaking mechanism in aspartic acid: lattice and sub-lattice matching
Author: Teschke, O.
Soares, D. M.
Abstract: A mother crystal formed from a transient molecular structure of (D+L) aspartic acid in solution is reported. Hexagonal structures with a lattice constant of 1.04 nm were crystallized from a solution in which three aspartic acid species coexist: right-and left-handed enantiomorphs, denoted D-aspartic and L-aspartic, respectively, and transitory (D+L) aspartic acid specie. Atomic force microscopy images of the crystalline deposits reveal domains of the transitory (D+L) aspartic acid crystal forming the substrate deposit on silicon wafers, and on top of this hexagonal lattice only L-aspartic acid is observed to conform and crystallize. A preferential crystallization mechanism is then observed for (D+L) aspartic acid crystals that seed only L-aspartic deposits by the geometrical matching of their multiple hexagonal lattice structures with periodicities of 1.04 nm and 0.52 nm, respectively.
Subject: Ácido aspártico
Cristalização
Simetria quebrada (Física)
Aspartic acid
Crystallization
Broken symmetry (Physics)
Country: Holanda
Editor: Elsevier
Rights: fechado
Identifier DOI: 10.1016/j.jcrysgro.2017.06.005
Address: https://www.sciencedirect.com/science/article/pii/S0022024817304220
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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