Modeling the polymorphism of pentacene

Christine C. Mattheus, Gilles A. De Wijs*, Robert A. De Groot, Thomas T M Palstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

200 Citations (Scopus)

Abstract

Thin films of pentacene are known to crystallize in at least four different polymorphs. All polymorphs are layered structures that are characterized by their interlayer spacing d(001). We develop a model that rationalizes the size of the interlayer spacing in terms of intralayer shifts of the pentacene molecules along their long molecular axes. It explains the wide variety of interlayer spacings, without distorting the herringbone pattern that is characteristic of many acenes. Using two simple theoretical models, we attempt to relate the intralayer shifts with the dominant, although weak, interatomic interactions (van der Waals, weak electrostatic, and covalent). For two polymorphs, a consistent picture is found. A full understanding of the other two, substrate-induced, polymorphs probably requires consideration of interlayer interactions.

Original languageEnglish
Pages (from-to)6323-6330
Number of pages8
JournalJournal of the American Chemical Society
Volume125
Issue number20
DOIs
Publication statusPublished - 21 May 2003
Externally publishedYes

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