Achieving dynamic behaviour and thermal expansion in the organic solid state via co-crystallization

Kristin M. Hutchins, Ryan H. Groeneman, Eric W. Reinheimer, Dale C. Swenson, Leonard R. MacGillivray

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Thermal expansion involves a response of a material to an external stimulus that typically involves an increase in a crystallographic axis (positive thermal expansion (PTE)), although shrinking with applied heat (negative thermal expansion (NTE)) is known in rarer cases. Here, we demonstrate a means to achieve dynamic molecular motion and thermal expansions in organic solids via co-crystallizations. One co-crystal component is known to exhibit dynamic behaviour in the solid state while the second, when varied systematically, affords co-crystals with linear thermal expansion coefficients that range from colossal to nearly zero. Two co-crystals exhibit rare NTE. We expect the approach to guide the design of molecular solids that enable predesigned motion related to thermal expansion processes.

Original languageEnglish
Pages (from-to)4717-4722
Number of pages6
JournalChemical Science
Volume6
Issue number8
DOIs
StatePublished - Aug 1 2015

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