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 cm1) 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.

Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene / Bacchi, Alessia; Ivano, Bilotti; Aldo, Brillante; Crocco, Domenico; Raffaele G., Della Valle; Girlando, Alberto; Masino, Matteo; Pelagatti, Paolo; Elisabetta, Venuti. - In: JOURNAL OF RAMAN SPECTROSCOPY. - ISSN 0377-0486. - 44:6(2013), pp. 905-908. [10.1002/jrs.4278]

Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene

BACCHI, Alessia;CROCCO, Domenico;GIRLANDO, Alberto;MASINO, Matteo;PELAGATTI, Paolo;
2013-01-01

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 cm1) 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.
Raman investigation of polymorphism in 1,1,4,4-tetraphenyl-butadiene / Bacchi, Alessia; Ivano, Bilotti; Aldo, Brillante; Crocco, Domenico; Raffaele G., Della Valle; Girlando, Alberto; Masino, Matteo; Pelagatti, Paolo; Elisabetta, Venuti. - In: JOURNAL OF RAMAN SPECTROSCOPY. - ISSN 0377-0486. - 44:6(2013), pp. 905-908. [10.1002/jrs.4278]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2617851
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