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Homo- and Heterochiral Supramolecular Tapes from Achiral, Enantiopure, and Racemic Promesogenic Formamides: Expression of Molecular Chirality in Two and Three Dimensions

✍ Scribed by Steven De Feyter; André Gesquière; Klaus Wurst; David B. Amabilino; Jaume Veciana; Frans C. De Schryver

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 254 KB
Volume: 40
Category: Article
ISSN: 0044-8249
DOI: 10.1002/1521-3773(20010903)40:17<3217::aid-anie3217>3.0.co;2-y

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✦ Synopsis

Enantiomorphous monolayers of enantiopure formamides form on a graphite surface, while the racemic compound does not undergo a spontaneous resolution under similar conditions. This difference in the two-dimensional behavior has been studied by scanning tunneling microscopy (see image of the racemate adsorbed on graphite). A study of the three-dimensional crystallization of the racemic formamide by X-ray crystallographic analysis also shows that it forms racemic tapes.

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Homo- and Heterochiral Supramolecular Ta

Homo- and Heterochiral Supramolecular Tapes from Achiral, Enantiopure, and Racemic Promesogenic Formamides: Expression of Molecular Chirality in Two and Three Dimensions

✍ Steven De Feyter; André Gesquière; Klaus Wurst; David B. Amabilino; Jaume Vecian 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 255 KB

Compounds 1 and 2 were prepared according to the published method. [15] The STM images were acquired in the variable current mode (constant height) under ambient conditions with the tip immersed in the liquid. For details see ref. [9].