Spectroscopic and structural characterization of two polymorphs of 1,1,4,4-tetraphenyl-1,3-butadiene

Alberto Girlando, Sandra Ianelli, Ivano Bilotti, Aldo Brillante, Raffaele G. Della Valle, Elisabetta Venuti, Marcello Campione, Stefano Mora, Leonardo Silvestri, Peter Spearman, Silvia Tavazzi

Research output: Contribution to journalArticlepeer-review

Abstract

We report a combined spectroscopic and structural study of polymorphism of 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) blue luminescent crystals. We have identified two polymorphs, which can be grown by crystallization of the vapor. The first, α-TPB, has the monoclinic noncentrosymmetric structure (P2 1, two molecules per unit cell), whose lattice parameters have already been reported in the literature. The second, β-TPB, is a new polymorph, monoclinic centrosymmetric (P21/c, four molecules per unit cell). The previously reported triclinic structure, γ-TPB, has not been identified in samples grown by the physical vapor transport method. The effects of the different molecular configuration and packing of α- and β-TPB on Raman scattering, IR, and UV-vis optical properties are discussed.

Original languageEnglish
Pages (from-to)2752-2758
Number of pages7
JournalCrystal Growth and Design
Volume10
Issue number6
DOIs
Publication statusPublished - Jun 2 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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