Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene
Article first published online: 9 APR 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 44, Issue 6, pages 905–908, June 2013
How to Cite
Bacchi, A., Bilotti, I., Brillante, A., Crocco, D., Della Valle, R. G., Girlando, A., Masino, M., Pelagatti, P. and Venuti, E. (2013), Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene. J. Raman Spectrosc., 44: 905–908. doi: 10.1002/jrs.4278
- Issue published online: 5 JUN 2013
- Article first published online: 9 APR 2013
- Manuscript Accepted: 18 JAN 2013
- Manuscript Revised: 18 DEC 2012
- Manuscript Received: 11 OCT 2012
- lattice phonons
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.