Tailor-Made Auxiliaries for Polar Growth from Melts

Bart Kahr, Alexander G. Shtukenberg, Jingxiang Yang, Michael D. Ward

Research output: Contribution to journalReview articlepeer-review


Tailor-made auxiliaries are generally less stereochemically discriminating of crystals grown from the melt than crystals grown from solution. However, it is possible to make supramolecular inferences using well-chosen additives in the manner taught to us by Lahav and Leiserowitz. Spherulites manifesting needle-like growth and small angle branching grow frequently from supercooled melts under high crystallization driving forces, along one principal crystallographic direction. If this direction is polar, it is important to establish its absolute sense as a basis for understanding growth at the interface between crystals and melt. This assignment, for polycrystalline ensembles, is beyond the capabilities of X-ray crystallography. Two examples of this discrimination are described with tailor-made additives, one for the β form of resorcinol and another for form I of L-malic acid. Assigning the absolute sense of a polar axis with molecular additives is a problem that resembles both the science and style of previous experiments from the Weizmann Institute.

Original languageEnglish (US)
Pages (from-to)583-589
Number of pages7
JournalIsrael Journal of Chemistry
Issue number9-10
StatePublished - Oct 2021


  • crystal growth
  • polar axis
  • spherulite
  • supercooled melts
  • tailor-made additives
  • tailor-made auxiliaries

ASJC Scopus subject areas

  • General Chemistry


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