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- Title
Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene.
- Authors
Bacchi, Alessia; Bilotti, Ivano; Brillante, Aldo; Crocco, Domenico; Della Valle, Raffaele G.; Girlando, Alberto; Masino, Matteo; Pelagatti, Paolo; Venuti, Elisabetta
- Abstract
We present a Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene (TPB), a well-known blue luminescent molecule, which retains its emissive properties in the solid state. The use of low-wavenumber (10-150 cm−1) Raman microscopy, very sensitive to the crystal packing, allows us to single and pick up four different polymorphs. X-ray analysis shows that the TPB molecules assume different conformations in the various polymorphs, a fact revealed also by the Raman spectra in the region of intra-molecular vibrations. Lattice dynamics calculations yield a preliminary assignment of the low-wavenumber Raman spectra and provide information of the relative stability of the phases. Copyright © 2013 John Wiley & Sons, Ltd.
- Subjects
RAMAN spectroscopy; POLYMORPHISM (Crystallography); BUTADIENE; LUMINESCENCE; CONFORMATIONAL analysis; PHONONS
- Publication
Journal of Raman Spectroscopy, 2013, Vol 44, Issue 6, p905
- ISSN
0377-0486
- Publication type
Article
- DOI
10.1002/jrs.4278