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Science 16 September 1988:
Vol. 241. no. 4872, pp. 1475 - 1479
DOI: 10.1126/science.241.4872.1475
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Articles

The Structure and Symmetry of Crystalline Solid Solutions: A General Revision

M. VAIDA 1, L. J. W. SHIMON 1, Y. WEISINGER-LEWIN 1, F. FROLOW 1, M. LAHAV 1, L. LEISEROWITZ 1, and R. K. MCMULLAN 2

1 Department of Structural Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.
2 Department of Chemistry, Brookhaven National Laboratory, Upton, NY 11973.

Mixed single crystals composed of host and guest organic molecules of similar structures and shapes are shown to comprise sectors with different host-guest distributions and to have symmetries lower than that of the host crystal. These properties are determined by the structure of the guest and the surface structures of the crystal faces through which the guest molecules are occluded. This general concept is illustrated by studies of three mixed crystal systems,(E)-cinnamamide—(E)-2-thienylacrylamide, (E)-cinnamamide—(E)-3-thienylacrylamide, and(S)-asparagine—(S)-aspartic acid, with x-ray and neutron diffraction and solid-state photochemistry.

Submitted on April 14, 1988
Accepted on July 13, 1988


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Molecular Recognition at Crystal Interfaces.
I. WEISSBUCH, L. ADDADI, and L. LEISEROWITZ (1991)
Science 253, 637-645
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)